understanding my OC results

[SmokeMojo20]

I have MSI K8N Neo2 Platinum with a A64 3000+ E6 Venice and just upgraded from 1GB to OCZ5002048ELGE-K with SAMSUNG UCCC.

I have followed the guide and can hit 285 FSB on by CPU (max was 295) with memory set to 100. Now I am just trying to find a happy medium for the memory. I can get the memory to past MEMTEST at DDR520 (2.85v) and OCCT will also pass the stability test at this speed (1.44v). But when I try Prime it will randomly fail from 1.5 to 7 hours.

I actually had it running at 280FSB (1.5v) with a 183Mhz divider and it passed OCCT but reach 54C and that kinda scarred me so I decided to drop it down. It made it only about 2 hours though on Prime. Wierd thing about the K8N Neo2 is that when the 183 divider is used at POST it then shows DDR200 but in Windows it will show correctly.

I am currently at 3-4-4-7 on the memory and it is 2 hours into Stress Prime Blend test. Currently at 50C. I have the GIGABYTE G-Power GH-PDU21-SC fan and it runs around 33C at idle.

Am I missing something here? Is it just a matter of loosing timings even more? Heck I can get MEMTEST to pass with only 2.7v at 3-3-3-5 at DDR500 but Prime doesn't want too no matter what I do.

Should I just run it at 250 1:1 and be done with it. I was doing this with my GIGARAM 466TCD kit but thought I might be able to get a little more speed out of this memory.

Any suggestions appreciated.

 

[5t3v0]

I have G.Skill DDR500 also using Samsung UCCC & mine dont overclock for ****** either. Some say that 2Gb puts more stress on the memory controller which might account for it. I found that higher vdimm gave worse results which might be G.Skill-specific but its worth a try lowering it. I am using 2.6v currently. Will the memory go to DDR520 on a 1:1 ratio with the cpu?

 

[TecHNooB]

Originally posted by: 5t3v0
I have G.Skill DDR500 also using Samsung UCCC & mine dont overclock for ****** either. Some say that 2Gb puts more stress on the memory controller which might account for it. I found that higher vdimm gave worse results which might be G.Skill-specific but its worth a try lowering it. I am using 2.6v currently. Will the memory go to DDR520 on a 1:1 ratio with the cpu?

1GB -> 2GB RAM will affect OC? Is this true? Might account for some of the trouble I'm having as I have also just upgraded to a set of G.Skills. The G.Skills do DDR520 3-4-3-5 1T easily but CPU needs more juice to hit speeds I normally hit on stock. For example, I used to be able to hit 2.5Ghz on 1.35v stock volts. Now it takes 1.375-1.3825v for the cpu to be truly stable at 2.5Ghz. What originally took 1.375v to hit 2.6Ghz now takes 1.45v++. I can't hit 2.7Ghz anymore. Used to be prime stable at 1.4825v. I'm currently running DDR500 3-4-3-5 1T / 250 x 10 since I really hate the idea of having to go over 1.45v to hit 2.6Ghz when it used to take far less.

 

[SmokeMojo20]

It is completely Stress Prime table at 250*9 1:1 DDR500 3-4-3-8 with 2.7v. Ran it over 10 hours @ 255*9 1:1 DDR510 3-4-3-8. Got to over 6 hours at 260FSB DDR520 3-4-3-8 so I don't know if I should just stick with DDR510 and try and tighten the timings or DDR520 and loosing them. Wierd thing is that anything above 250 the CPU clock in BIOS (1CO sideeffects modded) reports complete wrong ... like instead of 2340 (@260) it reports 36MHZ.

 

[SmokeMojo20]

I forgot ... I tried lowering volts and it gives random missing or corrupt Windows/system/xxxxx file error at boot.

Maybe I should consider 6+ hours at DDR520 good enough but probably not.

currently trying tighter timings at DDR510 3-3-3-7 2.8v ... approaching 2 hours now