2500k 4.4 1.35 volts used to be stable not anymore

J

Johnny197666

New member
I overclocked my 2500k to 4.4 ghz @ 1.335 volts ram was at 1600 rated speed 1.8v and it passed both occt tests but I lost the oc my making a mistake resetting CMOS I think and it just won't go back blue screens and freezing it's driving me nuts I have not changed anything bios hardware nothing plz help:)
 
Can you reset the RAM to stock and just test the CPU for stability. No point in testing both at the same time is pointless as if it crashes, you have no idea what the fault is.

1.8v on the RAM sounds way too high though. Do you have a link to the RAM - where you bought it from maybe? Why not just set it to XMP mode?
 
XMP is just an auto reset basically to what the RAM is at stock.

Can you clear the CMOS again, and leave the RAM settings alone. Then overclock the CPU on it's own and make sure that's stable
 
You just need to overclock it again by yourself and start afresh really. If there are BIOS updates then update it.

If your RAM is at stock settings and it blue screens when you're testing your CPU overclock, you know what the fault is.

You just need to test things yourself.
 
most likely you killed the ram 1.8 is alot for ram these days. I'm thinking your instability lies there not the CPU as 1.35 vcore isnt bad at all.
 
Would this be an ASUS Z68? They come with a Mem OK button that normally resets to stable memory spec. I certainly agree however, 1.8V is way high for DDR3 memory. Especially with Intel based controllers. They like it better around the 1.5V mark, though 1.65 doesn't seem to be a problem from my observations.

How long was it running at 1.8V? Have you tried some extra juice to the CPU (a notch or two above)?
 
S_I_N said:
most likely you killed the ram 1.8 is alot for ram these days. I'm thinking your instability lies there not the CPU as 1.35 vcore isnt bad at all.
Click to expand...

What he said.:)
You toasted your ram mate by the sounds of it. 1.8v is crazy high.
See if you can get hold of some test ram to make sure.
 
I'd have to agree, 1.8v for vanilla 1600mhz ram is too high. I know some of the specialist ram can need a few more v but 1.8v sounds too much. My own 1600mhz Corsair Vengeance ram uses 1.5v.

Btw: on my ASUS P8Z68-V Pro motherboard, XMP isn't always as reliable as it should be. For example, I had 2x4gb and 2x 8gb DIMMs, the former being 9-9-9 the latter 10-10-10 yet XMP forces the lot to 9-9-9 causing instabilities. Once I manually set the timings to 10-10-10 (plus the other bits of course) everything was fine...

Hope you ram isn't fried, but I'd not be surprised if it was.

Best of luck - worse case Ram is fairly cheap currently, so replacing it shouldn't sting too much.

Scoob.
 
1.8v stuff will work with SB but its not realy advised as the VVT voltage needs to be within .5v of the memory volts according to the intel spec IIRC, so for 1.8v ram you would need 1.3v VVT and the standard is like 1.05v or something so you would pushing it a little high.

Drop the cpu to stock and set the memory to 1.65v and bump the VVT to 1.15v and give it a stability test, your ram may not care TBH, if its unstable drop the ram to 1333 and try again.

If push comes to shove you will be running your ram at 1333 but it will be a bit safer for your memory controller and you wont notice any real performance hit.
 
also wtf 1.35 volts for a 4.4 OC :S

I must be really blessed as I'm running a 4.3ghz OC at 1.20 volts lulz
What kind of PSU / Motherboard do you have anyway? And what kind of cooling do you have in there?
If im hitting the wall at 4.5ghz then surely you must be hitting it at like 4ghz yikes
 
Good advice I Hunta x, I'd forgotten about that - I am a little out of practise it seems!

grassman: some people get lucky, some people don't. I need 1.35 or there abouts for an IBT stable 4.5 on my 2500k. That is under HEAVY IBT load mind. I get away with around 1.2 @ 4.5 if I just test using Prime and the like. There are of course many other factors other than CPU that contribute to a good OC, I can only guess which applies here.

Scoob.
 
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