Correct voltage & multiplier settings

Gigabyte Ga-ep45-ud3r motherboard
August 28, 2009 at 17:39:03
Specs: Windows Vista HP, E7600/Corsair XMS2 8500C5
Haven't received any replies to previous post.
Wanted correct timings & voltages to run super-stable...not O/C'ing.
Gigabyte EP45-UD3R Mobo
Corsair XMS2 DDR2-1066 (2 x 2Gb)
Wolfdale E7600 CPU
Sapphire HD4890 1Gb
Vista HP SP2

Any advice would be much appreciated...Mike.

See More: Correct voltage & multiplier settings

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August 28, 2009 at 18:21:37
Missed your last thread. What BIOS version are you using?

Link to other thread folks...


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August 28, 2009 at 18:31:37
Updated to F9 Mobo is revision 1.1

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August 28, 2009 at 18:35:37
If you not done so already, go to the Corsair web site and look up the ram that is listed for (is definately compatible with) your mboard model by using your mboard brand and model to search with.
If whatever the part number of your Corsair XMS2 DDR2-1066 is not listed, it MAY or MAY NOT work properly in your mboard.
If it IS listed, it should work fine in your mboard.
If it's NOT listed, it MAY work fine at 800mhz but NOT at 1066mhz, or it may just not work properly.

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:

Assuming the ram you have is listed....
Either find the timing numbers that are printed on your Corsair XMS2 DDR2-1066 modules, or find that in the specs for the exact same part number.

Go into the mboard's bios Setup and load Optimized Defaults, or similar, save settings.

Go into the bios Setup again and make sure your cpu model is running at the speed it is designed to run at, and find the place where the ram timing numbers are shown - those timing numbers should match the timing numbers on / for the ram modules, if those are the only modules you have installed.

NOTE that some bioses default to running the ram at 800mhz even when you have a cpu that you can use 1066mhz ram with and you have installed 1066mhz ram, and in that case you must change some setting to get it to run at 1066mhz.

Your cpu must support using 1066 mhz ram with it - if it doesn't you must run the ram at 800mhz. The timing numbers only apply to when the ram is running at 1066mhz.

If everything is right except the ram timing numbers, you can change those manually in Setup to match the specs of the modules, or as close as you can get with numbers that are HIGHER (slower).

Your particular video card requires a lot of power.

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD!)
You can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements.

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Related Solutions

August 28, 2009 at 18:43:01
I've tried all that, but thanks.
I contacted the retailer and was told to run the RAM (PC8500 C5 5-5-5-15) at 2.1v, but the motherboard shows this voltage up in red saying that I may damage the this just a generic warning or is the board detecting a problem. Also the optimized advanced settings for CPU and PCI voltages come up as 800 & 900mV, but the failsafe settings are 700mV and the system benchmarks faster with the latter, and also seems to be more reliable.
I'm just a little confused as to what should be "auto" and what needs to be tickled.

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August 28, 2009 at 18:51:33
I also upgraded the PSU to a TT 750 Toughpower. Unfortunately I plied my trade in the days of DOS 5 and preassembled Mobo/CPU combos. There's too much choice now in the settings, and I'm hoping that someone with the same combination of components has some insight into a bullerproof setup.

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August 28, 2009 at 19:04:00
I added a bit more to response 3 after you made response 4, before you made response 5.

If the modules you are using are not listed by Corsair for you mboard model they may not work properly in your mboard - this is especially the case and common for 1066mhz ram.
If the modules you are using are not listed by Corsair , you should get modules that are, by them or by other module manufacturers.

The default ram voltage is 1.8v, but mboards are capable of setting it higher than that, and usually default bios settings set the voltage to the voltage modules are rated for automatically, according the the info on the SPD chip on the modules. If the voltage the ram is set to is the same as the modules are rated for in their specs / on the label on the modules, ignoreany warning about the ram voltage in the bios Setup. However, some modules don't strictly follow the JEDEC standards most bioses use, and sometimes because of that the default ram timings the bios sets are incorrect must be changed.

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August 28, 2009 at 19:07:42
Took the time to double check, and both Gigabyte and Corsair sites list the combo as being compatible. I suspect that I inadverently changed some settings while mucking around with Easytune 6. Even though I reverted back to failsafe or optimized defaults, I really want a complete list of every timing and voltage parameter for this combo so that I can check each entry one-by-one.

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August 28, 2009 at 19:14:07
Default settings, other than possibly the ones I mentioned, should work fine!!

People frequently THINK the ram they're using should work fine, but there's no guarantee it will unless it's exact same part number is listed somewhere, in this case by Corsair, for your mboard model.

I started out with Dos 3.2 and my Dad's Sanyo 10mhz 286.

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August 28, 2009 at 19:33:29
OK I'll give that a try, everything on auto bar the DRAM voltage which I'll set manually to 2.1v (I checked the modules and they are marked as 2.1v). Can anyone recommend a good stress tester to give the new settings a good workout?
Again...thanks to all for the advice...cheers from downunder, Mike.

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August 28, 2009 at 19:39:02
I'm ashamed to admit it but prior to my first 286, I mucked around for a couple of years with a C64 and GEOS, before that was the Deakin Uni's Supercomputer using Fortran and punchcards...guess that nearly makes me a dinosaur.

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August 28, 2009 at 20:57:35
I'm in Canada myself.

I used to answer questions on Lanyon Computer's Constructor's Corner web pages, located in a small town or city in south east Aus, south of Canberra, before I started answering here, until they packed it in several years ago. I still get email from a fellow Alan Greaves, an Auzzie who also used to answer there and lives close enough that he bought things from their place.

No need to be ashamed about acquired knowledge.

Alan is older than I am and has had jobs to do with computers since there were only main frames. He worked for Compaq's support in Aus for a while.
I took a "Data Processing" course in grade 11 in 68-69 - it was simplistic - we learned how to program and run a card punching machine, a few other machines. There were only main frames then, no personal computers in schools.
I never used a computer until I used Dad's in 88 or 89.
After that my brother acquired an old Xerox computer that had 8" floppy drives and used the CPM language, and I fiddled with old PCs and XTs in the mid to late 90's

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August 28, 2009 at 21:05:20
Man, I loved Lanyon Computer's Constructor's Corner...more good info for old stuff than I've ever seen in one place.


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August 28, 2009 at 21:34:47
"Man, I loved Lanyon Computer's Constructor's Corner...more good info for old stuff than I've ever seen in one place."

Yes, that's why I started answering there. A friend had an old Gigabyte pentuim mboard, GA-586AT, the first model of a series - and they had the most useful info about it than anyone else I found on the web. Gigabyte no longer had the manual - they pointed me to the Total Hardware 99 web site for my first time (it was still viable then). The people who answered tended to explain things so anyone could understand what they were talking about even if they were newbies. I looked up a lot of old mboards, e.g. many Hsing Tech / PCChip /etc. ones, and still have the info I saved about them and many manuals, but of course many of the links in my info no longer work.

One of the things about their site is there was no time limit on making a post in an old thread for the "Active" threads we answered anyway. The "Inactive" threads could still be accessed, but you couldn't make a new post in them. But they never had the traffic this site has.

Apparently the owners of Lanyon Computers (two guys) saved the data on their server(s) that was there when they folded but I have not heard whether anyone else has put it back on the web since like was done with Total Hardware 99.

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September 23, 2009 at 03:47:54
Further to this thread if it's any help to others with the same issues...found that by dropping my RAM back to 800Mhz strapped at 2.00D) and increasing my FSB speed to 400Mhz, I can comfortably run my CPU at 3.40Ghz (multiplier 8.5) without crashing or overheating. Only other changes I made were to run CIA on the second highest setting (Turbo), GPU accelerator on Turbo, and RAM on Turbo as well with manual timings set to 5-5-5-18.
Also enabled Vdroop and manually set DRAM volts to 2.10v.
All runs like a dream with an increase of around 15% on benchmarks over standard.

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