K8N Neo4 SLI overclocking help >>

[lackdog]

I got a MSI K8N Neo4 SLI Mobo with a 3500+ venice in it. I got 2x512 of Corsair XMS 3200XL memory at 2-3-3-6 timings. I have the nforce voltage at 1.6, DDR Voltage at 1.85, HTT 3x, 236 FSB with an 11x multi and cpu voltage at like 1.525. I can run stable at the 2.6ghz it's at with the occasional lockup in games after playing awile. I can run windows stable at 2.7ghz and even play some games for long periods of times, but then the lockups and 3dmark won't even run at 2.7ghz. What can I do to stable this more? I have a Coolermaster 550watt real power PSU thats active with triple rails so power isnt a prob and I have a Hyper6 HSF so temps arent a problem with great case cooling. I tried mem at 2.5-3-3-7 and still the same probs so I don't think it's memory. Anandtech said my memory is good to DDR500 also. I look at cpu Z and just sitting idel i can watch the voltage fluctuate from 1.485 to 1.510 which is contantaly changing. Whats up with that? Do i need more voltage to the core? Any help appreciated! Thanks!

Agressive timings disabled ofcourse
Newest bios
Grafx card XFX 7800GT OC'd to 470/1100
2x WD Raptors raid 0
Blah blah blah
Fresh install WinXP with latest nvidia Nforce drivers

 

[rseven]

I suggest you try and isolate what is holding you back. Though your suspicion that your ram is fine may well be correct, use a 166 divider anyway just to completely take it out of the picture. I wouldn't worry too much about the voltage fluctuations as I am not confident CPU-Z or the mobo diode is reporting it correctly. Do you get this fluctuation reported in the bios? If not then I would certainly dismiss it. If you are still unstable with the ram on a divider then I would up the vcore in small increments and see if that does it. If the vcore proves to be the issue then by all means put your ram back to 1:1. I'm only suggesting the divider for testing purposes.
Also, I assume you meant to report your vdimm as 2.85 and not 1.85.

 

[lackdog]

Yes 2.85 on the vdimm. Ok i will try that and see what happens. Il be back later with a reply.

 

[martinjon666]

i don't know though, i had brand new ballistix, ddr500, and it turned out the ram wasn't good. my diamond vcore fluctates from 1.47 to 1.52, this is a tricky situation, may be ram timings, may be you need more voltage.

 

[epa]

i noticed that much people have the fluctuation prob.
mine also fluctuate 0.03 volts (sometimes even more)
the only thing that i can see ,is that the 3.3 volt rail is a bit low(3.17 volts)
i also have the coolermaster realpower.
how is your 3.3 volt rail?

edit,in the bios my 3.3=3.26>3.29 so thats ok

 

[martinjon666]

my 3.3 sits at 3.38 and sometimes goes down to 3.36

 

[martinjon666]

but i have an msi turbostream 500w

 

[epa]

this fluctuation does not help in therms of stability.
other than that i,m Happy with the board.
i will do the v-mod this weekend,see if that helps

 

[rseven]

An .05 voltage fluctuation is pretty normal and probably is board related. I have that much with my OCZ PSU and yet it's stable.

 

[Romulox]

Yea everyone has a these fluctuations on the vcore with these MSI boards.
I blame the core center chip because it says " help save power when not in use"
or something like that. This is what I get at 250x9 fsb 1:1 vcore 1.425 + 3.3 %
I wouldn't worry about the voltage changes unless it drops to something lower than required