RAM corrupts my system

November 6, 2009 at 18:59:52
Specs: Windows XP PRO
I recently installed two-1 Gig DDR 2700 Desktop 333 mhz 184-pin Non-ECC DIMM, for a total of 2G's of memory.
My mtherboard is a : K7_M863G ((V5.1A))_462_socket A
Specs read : Socket A w/ AMD Athlon XP 2200+ (1.80GHz, 256KB, 266MHz, Socket A)OEM AMD processor
FSB:333/266 MHz
Memory:2 x 184-pin DIMM sockets support two 2.5V DDR SDRAMs (DDR333/266) Max:2GB
When both are installed my system becomes unstable and frequently shuts down.It also only shows 512MB in each socket.I can put just one in and the system wont boot, but if I add 1- 512MB pc 2700 in the 2nd slot my stem remains stable but only uses 512MB from each slot for a total of 1G.I just updated the latest BIOS flash from AMI for my specific board. any ideas on how I can make them both work and be able to utilize 2G's ?


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#1
November 6, 2009 at 20:14:07
Your motherboard may be able to handle 1 gig sticks but that doesn't mean every 1 gig stick will work. Go to crucial.com and enter your mobo specs and see if the ram you bought is compatible.

Another but less likely possibility is you need a bios upgrade.

Help me Jebus!


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#2
November 7, 2009 at 05:58:44
This has nothing to do with your problem, but with AMD socket A systems, it's very important that you run the RAM at the same frequency as the CPU or you'll take a performance hit. You should have either gotten PC2100 (DDR266) or you should manually configure your PC2700 (DDR333) to run as DDR266.

http://pcchipsusa.com/prod-m863gv51...

Test your RAM with memtest86. If any errors are found, the RAM is defective & must be replaced.

http://www.memtest86.com/download.html

Other than that, it sounds like a density issue.


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#3
November 8, 2009 at 20:20:01
I ran Crucial Scan and this is what it returned about my installed memory:
It says I have 2 - 512MB DDR PC2700 memory modules

Each memory slot can hold DDR PC2700,DDR PC3200 with a maximum of 1GB per slot.*
*Not to exceed manufacturer supported memory.

It also says :
Guaranteed-compatible memory upgrades for your PC Chips M863AG v1.x Motherboard

Q: What memory goes into my computer, and can I mix speeds?

A: DDR memory with support for DDR PC2700,DDR PC3200 speeds.

Because DDR memory is backward-compatible, you can safely upgrade your system with any of the guaranteed-compatible DDR speeds listed below, even if your manual calls for PC1600 or PC2100 speeds.
---------------------------------------------------
And thats my problem, I actually have 2 - 1 Gig DDR SDRAM 2700 Desktop 333 mhz 184-pin Non-ECC DIMM installed for a total of 2G's of memory. And I'm only getting 512MB from each slot for a total of 1 G instead of the full 2G's
--------------------------------------------------------------------------
My motherboard is a : M863G ((V5.1A))_462_socket A
Specs read : Socket A w/ AMD Athlon XP 2200+ (1.80GHz, 256KB, 266MHz, Socket A)OEM AMD processor
FSB:333/266 MHz
Memory:2 x 184-pin DIMM sockets support two 2.5V DDR SDRAMs (DDR333/266) Max:2GB
------------------------------------------------------------------------------------------------------------------------------
When both 1G DDR SDRAM 2700 Desktop 333 mhz 184-pin Non-ECC DIMM are installed, It only shows 512MB in each socket. I can put just one: 1 Gig DDR SDRAM 2700 Desktop 333 mhz 184-pin Non-ECC DIMM in and the system wont boot, but if I add 1- 512MB pc 2700 in the 2nd slot my system remains stable but only uses 512MB from each slot for a total of 1G.I just updated the latest BIOS flash from AMI for my specific board.I also went into setup and configured my CPU and RAM to 1:1 133Mz and tried 1:1 at 166MHz .
Any ideas on how I can make them both work and be able to utilize 2G's


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#4
November 8, 2009 at 22:25:23
First of all, are you sure they're 1 gig sticks? There's probably a white sticker on each. What does it say?

If they are 1 gig sticks then they're either bad or incompatible. Do the sticks have chips on both sides? How many on each side?

Help me Jebus!


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#5
November 9, 2009 at 15:27:53
They both have 8 modules on each side. The white sticker says:
PC 2700 DDR SDRAM 128Mx64 1GB
1GBPFURTULAC

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#6
November 9, 2009 at 19:25:13
I ran across some mac memory not long ago that came in a kit of 2 sticks. The sticks were marked as if they were both 512 ram instead of 256. It was the 'kit' that was 512--not the sticks. I don't think that's the problem here. But the only reference I could find by googling 1GBPFURTULAC was someone with a similar problem. One stick was being seen as 1 gig and the other as 512. I don't know, maybe it's just crappy ram.

With 8 chips on each side it's probably not a density issue. It would be a good idea to run the memtest that jam linked to above and see what it says.

I downloaded the manual:

http://www.pcchips.com.tw/PCCWebSit...

and it said it also takes PC3200 (DDR400). I think if you really want to run that with 2 gig you'll need to shop around. Does the crucial site recommend compatible 1 gig sticks?

Help me Jebus!


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#7
November 12, 2009 at 10:34:47
I ran Crucial Scan and this is what it Said:
Each memory slot can hold DDR PC2700,DDR PC3200 with a maximum of 1GB per slot.*
*Not to exceed manufacturer supported memory.

It also says :
Guaranteed-compatible memory upgrades for your PC Chips M863AG v1.x Motherboard
DDR memory with support for DDR PC2700,DDR PC3200 speeds.
Because DDR memory is backward-compatible, you can safely upgrade your system with any of the guaranteed-compatible DDR speeds listed below, even if your manual calls for PC1600 or PC2100 speeds.
That is what the crucial scan told me about my system when I ran the scan.
But thats what I have installed now : I actually have 2 - 1 Gig DDR SDRAM 2700 Desktop 333 mhz 184-pin Non-ECC DIMM installed for a total of 2G's of memory. And I'm only getting 512MB from each slot for a total of 1 G instead of the full 2G's
If I only put one stick in, on the POST it shows I have only 512MB, but then my computer wont boot.
But if I put just one stick of my old RAM in,either : 1-256MB stick or just 1- 512MB stick it will boot just fine.
Whats really strange is that if I put just one of the new RAM sticks: 1-


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#8
November 12, 2009 at 11:10:38
Sorry I somehow sent the one above before i was finished.

When I ran Crucial Scan and this is what it returned about my installed memory:
It says I have 2 - 512MB DDR PC2700 memory modules

Each memory slot can hold DDR PC2700,DDR PC3200 with a maximum of 1GB per slot.*
*Not to exceed manufacturer supported memory.
It also says :
Because DDR memory is backward-compatible, you can safely upgrade your system with any of the guaranteed-compatible DDR speeds listed below, even if your manual calls for PC1600 or PC2100 speeds.
Guaranteed-compatible memory upgrades for your PC Chips M863AG v1.x Motherboard
DDR memory with support for DDR PC2700,DDR PC3200 speeds.
But thats what I have installed that wont work :
I actually have 2 - 1 Gig DDR SDRAM 2700 Desktop 333 mhz 184-pin Non-ECC DIMM installed for a total of 2G's of memory. And I'm only getting 512MB from each slot for a total of 1 G instead of the full 2G's
The strange thing is that I can run just one single stick of my old memory : 512MB DDR PC2700 memory , and my system will boot and run fine, but if I put as single stick of the new memory in ; The 1 Gig DDR SDRAM 2700 Desktop 333 mhz 184-pin Non-ECC DIMM, on the screen during POST, it shows that I have only 512MB but system won't boot up!!
Even stranger is, if I add 1 of my old sticks ; Like a 256MB DDR PC2700 memory in the second slot and 1 of my new sticks ; The 1 Gig DDR SDRAM 2700 Desktop 333 mhz 184-pin Non-ECC DIMM , in the first slot, the system shows 512MBs in each slot !! not 512MB in one and 256MB in the other like you would think. It's adding another 256MBs to the second slot! so I'm actually,in this case, getting 512MBs of the 1GB memory in the in the first slot and then it's adding 256MBs of the RAM form the 1GB stick in the first slot to the 256MB stick in the second slot for a total of 512MBs in each slot!!!
This would tell me that The new 1 Gig DDR SDRAM 2700 Desktop 333 mhz 184-pin Non-ECC DIMM , is at least 750MB at minimum, right.But still can only get 512MBs per each slot..



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#9
November 12, 2009 at 13:12:10
Since the old ram seems to work OK I'd think the problem is with the new ram and not some motherboard hardware problem or damaged ram slots. That's a pretty old board to be able to handle 1 gig sticks so it may be finicky in which ones it'll take.

If you can get it to boot up try running the memtest jam suggested. I think there's a version that'll fit on a floppy bootdisk and it may be easier to run it that way.

Help me Jebus!


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#10
November 12, 2009 at 19:49:03
Thanks, I'll try that. I finally got this info from the place I purchased the RAM from.Here is what the information said about the RAM I have:
----------------------------------------
Brand New 1024MB PC2700 333Mhz DDR 1GB Memory

1024MB PC2700 DDR333 DDR-SDRAM 333 MHz fast!

84 pin Dimm (for desktop PCs, not for laptops) 128x64 modules (1gb, non- ecc), Non ecc, non registered, unbuffered

*IMPORTANT NOTE*High Density** (128mx4 configuration) chips. (Manufacturers tested folowing chipsets to be compatible: VIA P4M800, VIA KT400, VIA KT600, VIA PT800, SIS 645, SIS648, SIS 648FX and SIS 746FX.) NOT compatible to all(any) ASUS motherboards, name brand PCs, Apples/Macs, laptops and boards with other types of chipsets. Incompatible motherboards will only recognize a fraction of its 1gb (such as 32mb, 512mb) capacity or none at all. Limited in compatibility. Not for brand name PC.

Please see our LOW DENSITY 1GB in our other listings for fully compatible 1gb DDR.

Brand New, First Quality and Fully Tested, non-retail.

ONE module (1 stick) 1 GB

Limited Life-Time Warranty
-----------------------------------------
could my system possibly need the lower density RAM they are talking about ?


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#11
November 12, 2009 at 21:27:39
That's likely the problem. With 8 chips on each side I would have expected them to be low density but I guess that's not a 100% accurate way to classify low and high density sticks.

Yeah, just make sure any ones you buy in the future are low density. I was looking for PC3200 on ebay recently and noticed some were specified as low density.

Help me Jebus!


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#12
November 14, 2009 at 07:47:02
Thanks , I apreciate the help.
Johnboy

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