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after memory upgrade, cannot OC

post #1 of 3
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So for awhile I was having a problem just getting my system to run after my memory upgrade, but now it is working fine. The problem is even if i bump the FSB up just a tad it tells me upon startup that my system is going into safemode and it wont hold any of the OC. I can crank up the SLI memory but anything in regards to OCing it further with the RAM or the CPU it just goes back to stock. Do i need to DL a new BIOS or something??
Edited by yot - 6/29/08 at 12:17pm
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post #2 of 3
SLI memory? Any frequency to do with graphics cards should be fixed at stock frequencies or left to those with uppermost tweaking skills. Make sure your PCI frequency is fixed or set it to auto. Your memory may not have much more headroom then the manufactured operating speed of 1066MHz.

Like many with DDR2-8500 kits you may have to run your memory on a divider. So in your bios get you memory to run right around 1066MHz or just above. If you go above you may have to loosen the timings, like to 6-8-8-18 or something like that instead of the 5-5-5-15 you are likely running them at for anything above the 1066MHz.

You will have to determine if running your memory on a divider with tighter timings or running them at a high frequency with looser timings produce better performance. The only way you will be able to determine this is with some benchmarking like SuperPi or PCMark05. A quick 1m SuperPi run is the fastest way to check performance of memory tweaking.
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post #3 of 3
Alright, try this first. Set your FSB to 400 and also set your RAM to 400 also and see if it works. I know you'll only be at 3.2, but try it to see if it's your RAM that's the issue. You shouldn't be fooling around with RAM til you get your OC stable, then if you run into an issue you'll know where to look.
Also is that 2X2GB or 4X1GB? Either way you may need more NB voltage, but with 4X1 you'll need even more.
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