9800gt and 9800gtx both wont work

Biostar / Ta720
August 1, 2009 at 19:04:57
Specs: Windows XP
I Recently purchased a Biostar TA720 motherboard and a BFG 800w power supply.

It has PCI-express 2.0

so i hook up a 9800GTX oc2 and the motherboard wont post, i pull the card out, and reboot, then i get a CMOS checksum bad error, resulting in my having to pull out the battery, blah blah blah.

I tried it also with a BRAND NEW 9800gt, and i got the same thing, could it just be a DOA board? or could this be a power supply issue?


See More: 9800gt and 9800gtx both wont work

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#1
August 1, 2009 at 19:10:55
You mean a TA790?

Skip


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#2
August 1, 2009 at 23:55:27
yea sorry its a TForce TA790

and im starting to lean towards the power supply being the problem, but i dont wanna shell out another 200 dollars unless im a little more certain lol.


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#3
August 12, 2009 at 12:14:32
bump, yea its not just the PCI-E slot anymore, everytime it boots now i get a CMOS checksum error and i have to re-input my bios settings, im pretty sure its a combination between the motherboard AND the power supply, can anyone else here with experience tell me if they agree or not? plz :D

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Related Solutions

#4
August 12, 2009 at 13:25:40
Which specific TA790 model do you have - is there anything after TA790?
There's a whole bunch of them!
e.g. The model on the label on the box it came in.
The model printed on the surface of the mboard, though that may be shorter.

Your mboard has an extra power socket other than the main one that MUST be connected to a connector andwiring for that coming from the power supply.

Your PCI-E video cards may also have a power socket that MUST be connected to a connector and wiring for that coming from the power supply.

If you have been fiddling with the clear cmos jumper on the mboard, or in any case, make sure the cmos jumper is in the "normal" position. Consult the manual - the markings on the mboard may be confusing.
If you have removed and re-installed the mboard battery for the cmos, make sure it's installed correctly and the contacts of it's socket are contacting it properly - e.g. if it's flat on the mboard, + must be upwards on the battery, where you can see it.
...

Apparently your mboard probably has onboard video.

Your no video from the video cards may indicate you have this problem - the bios may NOT automatically disable the onboard video when you install a video card!
NOTE that I recently installed an Asus M3A78 Pro mboard - it has an AMD main chipset and also has onboard ATI video.
The onboard video worked fine. When I then installed a Visiontek HD AIW card (ATI chipset) and connected a monitor to it - I got NO VIDEO.
It turned out the onboard video was still enabled and is NOT automatically disabled when you install a PCI-E X16 card - you have to connect a monitor to the onboard video, then go into the bios Setup and set Initialize Video First, or Primary Video, or similar to PCI-E, rather than onboard video, then the Visiontek HD AIW card (or any PCI-E X16 card) will output video to a monitor.

You may need to do the same thing!
...........

ATX mboards are always powered in some places by the ATX power supply, even when the computer is not running, as long as the power supply is getting live AC, it's switched on, and it's connected to the mboard.
Did you REMOVE the AC power to the power supply while installing or removing the video cards, or while doing anything else with connections or components inside the case?
If you didn't, you may have damaged something - e.g. the video cards, and/or the PCI-E x16 slot circuits, or the ram.
......

You should not be getting any bios errors.

Defective mboards are relatively rare - almost always there's something else wrong.

One of the most common reasons a new build doesn't work properly is this.....
you have installed incompatible ram, or it is compatible but it has a poor connection.

You can get FALSE error messages from the bios and/or have all sorts of problems if you have installed incompatible ram, or it is compatible but it has a poor connection.

...

A common thing that can happen with ram, even ram that worked fine previously, is the ram has, or has developed, a poor connection in it's slot(s).
This usually happens a long time after the ram was installed, but it can happen with new ram, or after moving the computer case from one place to another, and I've had even new modules that needed to have their contacts cleaned.

See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:
http://www.computing.net/hardware/w...
....

Not all ram will work in your mboard properly!

e.g. At least some TA790 models are not rated as being able to use anything faster than 800mhz ram, despite the fact a Phenom cpu can be installed and supports that ram.
If the model does support using faster ram, it can run it at that speed ONLY if you have installed a Phenom cpu - the memory controller is on the cpu - otherwise it will run it at 800mhz, max.

It is easy to test for incompatible ram that has caused your mboard to fail to work properly.

Make sure you have a speaker or speakers or the equivalent connected to the mboard so you can hear mboard beeps (see your mboard manual if you need to).
Remove the AC power to the case/power supply.
Remove all the ram.
Restore AC power.
Try to boot.
If nothing else is wrong, you will get no video but you will hear a pattern of beeps that indicate no ram is installed, or a ram problem.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.

In your case you should get NO bios generated errors when there's no ram installed. You MAY need to go into the bios and set the present date and time, first, once, however.
......

If you didn't look up which ram works properly in your mboard before you bought it, it may NOT be compatible with the mboard!

Ram that works in another mboard , or any ram you buy or have lying around, may not work properly, or sometimes, not at all - even if it physically fits and is the right overall type (e.g. SDram, DDR, DDR2, etc.; PCxxxx, xxx mhz) for your mboard. In the worst cases of incompatibilty your mboard WILL NOT BOOT all the way with it installed, and the mboard may not even beep - the ram has to be compatible with the mboard's main chipset, or in the case of recent mboards, compatible with the memory controller built into the cpu.

If you still have the ram that was installed when the system worked fine, try installing just that ram.


See response 5 in this for some info about ram compatibilty, and some places where you can find out what will work in your mboard for sure:
http://www.computing.net/hardware/w...
Correction to that:
Mushkin www.mushkin.com

NOTE that if you have G-Skil or other "also-ran" brand ram, I have further info you need to be made aware of - e.g. you may need to use manually set ram timing or HIGHER ram timing settings.

Once you know which module ID strings work in your mboard, you can get them from anywhere you like that has ram with those ID strings.

If you have brand name ram, it is usually easy to look up whether it's ID string is in a list of compatible modules found by using your mboard or brand name system model number.
If the ram is generic, that may be difficult or impossible.
.......

You can confirm whether the ram is working properly or not by running a ram diagnostic test.
Contrary to popular belief, having actual BAD ram is extremely rare, although if it is new and BAD that shows up right away. In almost all cases, if the ram isn't working properly, it's either because it has a poor connection, or you are trying to use the wrong ram - it's incompatible with the mboard, or with the memory controller built into certain cpus.

If you do a ram test, do that AFTER having tried cleaning the contacts and making sure the ram is seated properly - otherwise any errors found may be FALSE.
If the ram is incompatible with the chipset, or on more recent computers, incompatible with the memory controller built into the cpu, it will likely FAIL a ram test - that is NOT a true indication of the ram being faulty - there is probably nothing wrong with it, and it will pass the test if installed in a mboard it is compatible with.
If a ram test DOES find errors, if you have more than one module installed, try the test with one module at a time - sometimes they won't work properly when more than one is installed, but it will pass when by itself.


If you want to try a memory diagnostic utility that takes a lot less time to run a full pass than memtest86 does, this one is pretty good - Microsoft's
Windows Memory Diagnostic:
http://oca.microsoft.com/en/windiag...
It can be toggled (press T) to do a standard or a more comprehensive set of tests - use the default 6 test one first - if it passes one pass of that, use the latter one. A few of the tests in the latter set are intentionally slower.
If you don't have a floppy drive, see the Quick Start Information at that Microsoft link for how to make a bootable CD of the Windows Memory Diagnostic (you need Windiag.iso - you don't necessarily need to use the program they mention to add it to the CD).


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#5
August 12, 2009 at 16:56:16
BIOSTAR TForce TF720 A2+ AM2+/AM2 NVIDIA nForce 720a ATX AMD Motherboard

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#6
August 12, 2009 at 17:03:48
also, im not completely new with PC builds, i've pretty much tried all of this, when i put the video card in, i made sure that the onboard video was disabled in the bios and in windows before i even put the card in, also, the bios has the option to be able to use both onboard AND the PCI-E card, without having to disable anything, however, whenenver i tried to boot, it wouldnt even load the bios, so i did the next thing, i tried booting into the bios with onboard, but with the card installed, nothing, so i pulled the card out, reconnected the onboard, and started up the computer, BOOM CMOS Checksum error


CMOS checksum errors

Explanation: A checksum is computed as an error-detecting code, to protect the BIOS settings stored in the CMOS memory. Each time the system is booted this number is recomputed and checked against the stored value. If they do not match, an error message is generated to tell you that the CMOS memory contents may have been corrupted and therefore some settings may be wrong. BIOSes react in different ways to encountering this sort of error. Some will warn the user and then continue on with whatever settings were in the CMOS. Others will assume that the settings that were in the CMOS were corrupted and will load default values stored in the BIOS chip "for safety reasons". The error message will indicate which your system is doing.


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#7
August 12, 2009 at 17:06:17
Diagnosis: The most common cause of checksum errors in CMOS is a battery that is losing power. Viruses can also affect CMOS settings, and motherboard problems can also affect the stored values.

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#8
August 12, 2009 at 19:24:56
"BIOSTAR TForce TF720 "

Did you state the model wrong?
You stated TA720, then TA790.
There is a TA720 but it appears there is no English version of it - it's certainly not sold in the US or Canada - all the "hits" were in other languages when I searched.

If you had a TA790 on Aug 1st and you now have a TF720 and you're still getting the cmos checksum error, the most likely thing is the ram you have installed is incompatible with BOTH mboards! - see above.

What I was tallking of brefore is there is a whole series of TA790 mboard models not just one - there is more to ythe model number after TA790.

"....the bios has the option to be able to use both onboard AND the PCI-E card, without having to disable anything"

If the mboard has a "hybrid" or similar feature where you can have both the onboard video and a card in a slot enabled, if it's like the situation with certain AMD chipsets, it ONLY works with cards with specific video chipsets, AND it only works in Vista.
Most mboards auto disable the onboard video when a card is installed in aPCI-E slot, although with some new and recent mboards/main chipsets there are exceptions.
........

The cmos checksum error can be caused by a cmos battery that's too weak or dead, but that's extremely unlikely. On most more recent desktop mboards the cmos battery is not rechargable - on some laptops it is, and it can discharge if the laptop sits un-used a long time.

The cmos battery on mboards typiically last 5 years or more. If you think the battery is no good, measure it's voltage - it's probably rated at 3 or 3.3 v - or replace it - it's not expensive - you may even find a "dollar store" that sells it.

Other things that can cause the cmos checksum error.

You may get FALSE bios errors if the ram is incomptible with the mbioard, or if the ram is not seated properly - see above.

The clear cmos jumper on the mboard may be in the wrong place.
If you have been fiddling with the clear cmos jumper on the mboard, or in any case, make sure the cmos jumper is in the "normal" position. Consult the manual - the markings on the mboard may be confusing

If the battery is upside down or backwards (wrong polarity) , or if there's something wrong with it's connection... .

If you have removed and re-installed the mboard battery for the cmos, make sure it's installed correctly and the contacts of it's socket are contacting it properly - e.g. if it's flat on the mboard, + must be upwards on the battery, where you can see it.

You or someone flashed the bios and the flash failed - in that case you MAY get Cmos Checksum Error or similar AND Boot Block Bios loaded or similar. You may have to install a PCI video card to see that message at all .If you don't get the second part, the bioschip probably must be replaced
...

IF the ram you have installed is compatible and has a good connection ...

You will get the cmos checksum error when you boot
- after having cleared the cmos
- after removing the battery and re-installing it
- if you flashed the bios if it was successful
In that case, you go into the bios while booting and set at least the date and time, save settings, then you will not get the message while booting after that.

You can also get the message
- it if the battery isn't being recognizedfor whatever reason
- possibly if the cmos jumper is in the clear postion

In that case, you can set at least thedateand time in the bios, save settings - the bios will retain the settings while you're in Windows or if you reboot, but if you shut down the computer and turn off the power to it, turn it back on you will get the cmos checksum error again.
........

The cmos checksum error does NOT normally cause no post or no video, unless the bios was flashed and that failed.
The cmos clear jumper being in the clear position MAY cause no post and no video.

Installing incomptible ram, or the ram having a poor connection, CAN cause no post or no video or BOTH.

Malware that attacks the bios is extremely rare these days. A new mboard would not have that.



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#9
August 12, 2009 at 20:48:56
no i messed up and grabbed the wrong model number, sorry
:(

i looked it up on newegg, its the TF720 always has been

but its wierd, im thinking that the whole motherboard just locks up whenever i put a video card in that slot, and there is no PC speaker that i can use currently, so i cant check for beeps, i fixed the cmons constantly coming up, however it still does it if i put a card in that slot, then take it back out because of no video, and reboot, i've just got no damn clue, im starting to think that the power supply is wired wrong and whenever i use the power connections for the video card it just locks everything up with bad power.


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#10
August 13, 2009 at 10:27:56
It's extremely unlikely there's anything wrong with the power supply, if it was new or working fine with another system previously, unless at some point you did NOT remove the AC power to it while connecting or disconnecting anything to the PS or the mboard when the PS was connected to it, in which case you MAY have damaged it. E.g. I fried the board on one PS by merely plugging in a hard drive - there was nothing wrong with the hard drive before or after that - the PS was also plugged into the mboard.

If you have another or can borrow a used power supply that has the right connectors and has at least 400 watts capacity, you could try it with this mboard,
(minimum PS capacity for a system with a single 9800GT video chipset CARD installed - 400 watts - 9800GTX - 450 watts; with no CARD installed (onboard video is NOT a CARD) a 350 watt, or maybe 300 watt, PS is probably adequate; 50 watts more required for 9800GT or GTX in SLI mode - normally that's for when you have two cards in slots, or two chipsets on one card - e.g. 9800GT X2 - that may apply if you can use the Hybrid mode for the particular card chipset and DO use Hybrid mode)

or - you could try this power supply with another working system - in most cases the main power connector from the PS is two pieces and the 4 "pin" piece can be unclipped from or slid off the 20 "pin" piece if you need to connect it to a mboard with a 20 "pin" main connector.
....................

Are you sure you got that right this time?

Why didn't you just quote this?:

The model on the label on the box it came in.
or
The model printed on the surface of the mboard, though that may be shorter.

I'll assume you do have TF720 - if so there is only one possible model of that, assuming you're in the US or Canada.
TF720 A2+ 6.x
6.x is probably the mboard revision or version, and probably printed on the mboard suface, x being a specific number
......

You have NOT said whether the mboard works normally when you DO NOT have a graphics card installed and you connect a monitor to the onboard video.

If you have set video bios settings incorrectly, that MAY not work until you
- remove the AC to the power supply, move the clear cmos jumper to the clear position (pins 2 and 3) , wait at least 5 seconds, move the jumper back to the normal position (pins 1and 2), restore AC power, boot.
You'll get the Cmos Checksum error.
Go into the bios Setup and set at least the date and time.
You should NOT get the Cmos Checksum error while booting after that.

- OR - remove the AC to the power supply, remove the cmos battery, wait at least 5 minutes, install the battery so + is upwards, restore AC power, boot.
You'll get the Cmos Checksum error.
Go into the bios Setup and set at least the date and time.
You should NOT get the Cmos Checksum error while booting after that.
.......

If the onboard video doesn't work properly either, you probably have either.....
- a ram compatibility problem.
I need to know what the ram module brand and part numbers are.

E.g. Kingston KVR800D2N6/1GB

OR - you're trying to use a cpu your mboard does not support.

CPU support for TF720 A2+ 6.x
http://www.biostar-usa.com/app/en%2...

There's only one bios version for your mboard - that's probably what it already has - so flashing the bios won't change the cpu support .
NEVER flash the bios unless you find specific info such as on the same page you can the download it that it will definately cure a problem you're having.
The list has no cpu listed that requires more than 95 watts.
This may indicate the mboard does not support you using cpus that require more than about 95 watts
Some Phenom models require a mboard supports more than that - up to 140 watts.

Whats the model code of the cpu? - if you still have the box, state the code on that. Example codes are in the list at the link above.
.........

Partial specs

nVidia nForce 720a chipset

Integrated Geforce 8100-based graphics (DX10)

Support nVidia Hybrid SLI Technology

MEMORY

Support Dual Channel DDR2 533/667/800/1066(1066 by AM2+ CPU) MHz
4 x DDR2 DIMM Memory Slot
Max. Supports up to 16GB Memory
It is recommended to use those Validated DDR2-1066 modules suggested by AMD
http://www.amd.com/us-en/assets/con...
....

My notes...

32 bit operating systems - e.g. 2000, XP Home, XP Pro 32 bit, XP MCE, Vista 32 bit - can't use more than 4gb of ram, and can't use all of 4gb ram for user programs. You can probably install more but it can't be used by the operating system.

64 bit operating systems - e.g. XP Pro 64 bit, Vista 64 bit - can use more than 4gb of ram
........

OS SUPPORT

Support Windows XP / XP 64 / Vista / Vista 64

My note: It can't support ME and previous. It MIGHT support 2000 if the XP drivers work for 2000 too, or if they don't if you can get 2000 drivers.
................................

Manual - this is probably the same as on the CD that came with the mboard, and if you got a printed manual with the mboard that is a full manual, the same as in that.
http://www.biostar-usa.com/upload/M...

Page numbers quoted are those of the pdf manual. They may not be the same as for the printed manual.

4 "pin" socket near where PS/2 keyboard or mouse plugs in.

That MUST be connected to the power supply, as well as the main 24 "pin" socket.

Page 9 manual - if you have a 3 wire" fan, that connects to the left 3 pins.
Usually the 3 or 4 wire CPU fan MUST be connected to the cpu fan header!

page 14 - front panel header - including where you connect a speaker.
Surely you have a case.It's often easy to remove the speaker from the case. Connect a speaker to that header.
NOTE that sometimes the mboard comes with a small piezo device, rather than a speaker, you can plug in there.

Page 17 - clear cmos header - must be on pins 2-3 for normal operation.

Page 19 - SATA 5 and 6 sockets only support AHCI and RAID mode

Two diagnostic leds near cmos battery
LED1 LED2
ON ON Normal
ON OFF Memory error
OFF ON VGA (video) error
OFF OFF Abnormal - CPU/Chipset error (or failing or defective or dead power supply )


Page 20 - AUX power socket for Graphics - for graphics card
NOTE that this looks like the socket is male and if so you may have to connect a larger power connector (which is female) from the PS to this socket when you install a video card in a PCI-E X16 slot!! It probably does no harm at all to plug one in in any case! - if you want confirmation about that, email the Biostar web site, or look for further info on their site.
If the socket on the mboard is female, then it's probably for an alternate way of connecting to the additional power socket some PCI-E cards have, by means of a larger male drive connector (molex) to card connector adapter some PCI-E cards come with.

Your PCI-E video cards may also have a power socket that MUST be connected to a connector and wiring for that coming from the power supply.

Page 26 - start of Bios Setup description

Exit tab page
Cmos reloading program (load bios defaults)

You MAY need to reload that. It does no harm to load that.
That will not reset the time and date in the bios to defaults. (clearing the cmos by moving the jumper, or removing the battery, will reset the date and time to defaults)
....

T-series tab

Integrated memory test -
description page 30
Allows you to test memory compatibilities

Page 45 - AMI Bios Beep codes

My note: Most bioses beep once while booting if the POST was successful and there is no ram or video problem.
.............................................................

nVidia Hybrid SLI info

This page will not load for me at the present time:
http://www.nvidia.co.uk/page/hybrid...
....

http://en.wikipedia.org/wiki/Scalab...
(Excerpts)

Hybrid SLI

Caveats
In an SLI configuration, cards can be of mixed manufacturers, card model names, BIOS revisions or clock speeds. However, they must be of the same GPU series (e.g. 8600, 8800) and GPU model name (e.g. GT, GTS, GTX).[15]

My note - that may indicate your 9800 cards CANNOT work in Hybrid mode work along with your Geforce 8100 integrated video!

Users having a Hybrid SLI setup must manually change modes between HybridPower and GeForce Boost....
.......

What are the requirementsfor Hybrid SLI?
http://nvidia.custhelp.com/cgi-bin/...

Similar and how to enable Hybrid SLI - you MUST do that in your bios Setup:
Introducing Hybrid SLI Technology
http://www.nvidia.com/content/hsli/...

Found in that:
"Hybrid SLI is supported only by Windows Vista"

My note: I would think you would still get video until XP loads, but I'm not sure.


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#11
August 14, 2009 at 08:40:48
yea, the computer is locking up completely when i try to use the video card, thats why im getting a cheksum after i take it out and go back to onboard.

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#12
August 14, 2009 at 11:53:53
You STILL have NOT said whether the mboard works normally when you DO NOT have a graphics card installed and you connect a monitor to the onboard video.


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