DDR500 mean guaranteed overclock?

A

Anti-Hero

Limp Gawd
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Jul 22, 2006
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I'm thinking about getting 2x1GB sticks of DDR500 (Along with a new S939 Xfire mobo) to do some more OCing, I can't get my 3200+ past 2.3GHz without getting a BSOD and I'm thinking it might be due to my generic crucial 4x512MB sticks of DDR400. Would the RAM changeout (plus a better OCing mobo) make that much of a difference? I'm assuming that as long as the CPU, and Motherboard, can handle the 250 MHz OC then running the stock DDR500 means an automatic 500 MHz CPU OC. Thoughts?
 
No.. The only thing that RAM guarantees is that it can run at DDR500. Thats all.
 
IE... the Ram is rated to run at at least 250mhz with the stated voltage and timings.

Course, it depends on your board too. My Asrock board was able to run my Geil DDR500 ram at DDR498 speeds (bah, 1mhz off) but my Asus board can't run it over about 240mhz (DDR 480). Strange.

Can't you just run a divider and see how high your board will take your FSB?
 
Arcygenical said:
I

Can't you just run a divider and see how high your board will take your FSB?
Click to expand...


That would be to easy. :p Seriously just use a divider and find the max overclock of your CPU before you start messing with your RAM.
 
use a divider before u buy the ram. running a divider would take the ran out of the equation as the liming factor during OC.
 
I don't think my current motherboard (spec in sig) has a FSB divider :( I looked around and saw that you could manually set the operating frequency. I went ahead and set it for 200MHz and then went and went and messed with the HTT in the overclocking menu. Still the same reults.

edit: What would be some recommended DDR400 for OCing ? (2x1Gb)
 
With your mobo, you need to make sure the DDR timings arn't set to "aggressive" levels...

With the agressive timings you're looking at 235FSB tops. Try setting them higher by 1 setting on each, and apply the 5:6 divider (also called running your RAM in DDR333, which is one way mobo manufacturers name dividers).

Can you find an option to change the DDR setting?

Your value RAM should be able to do at least 205mhz...
 
manually setting the memory frequency is the same as using a divider. it is another term for memory divider.
266mhz/DDR533 = 4:3
250mhz/DDR500 = 5:4
233mhz/DDR466 = 7:6
216mhz/DDR433 = 13:12
200mhz/DDR400 = 1:1
180mhz/DDR360 = 9:10
166mhz/DDR333 = 5:6
150mhz/DDR300 = 3:4
133mhz/DDR266 = 2:3
120mhz/DDR240 = 3:5
100mhz/DDR200 = 1:2
 
So what I did was manually set my ram to DDR333 speeds, then boosted my FSB up to 240MHz and am now running prime95. So what is my equivalent RAM speed right now? I'm a little clueless as to how all the formulas work right now.

edit: Now running at 250MHz. So that means my RAM is running at 5/6 of total FSB. I think I got this figured out. So essentially, since I've proven my board/CPU will go up to 250MHz, I could go and buy some DDR500 and then not worry about a divider and have a system OC'd by 500MHz with the RAM not overclocked.
 
Tell you the truth , i reckon your better off running at ddr400 with very very tight timings , than lloser 500 latencies.
 
nooh said:
Tell you the truth , i reckon your better off running at ddr400 with very very tight timings , than lloser 500 latencies.
Click to expand...
that's why use a divider to run at tighter timings.
 
My current cheapo Crucial DDR400 definitely doesn't like being ran at over 205MHz. I ran Prime95 for a couple hours @ 250MHz FSB with no errors, but randomly had it BSOD with an error message before quickly rebooting (didn't have time to jot down the error to post here). Bumped it down to 240MHz FSB with a 5:6 divider and it seems to be working all right. I might spring for some better RAM if I feel so inclined.
 
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