Coire i5 2500k overclocking

[jaspreetsinghbabbra]

Hi all
I have a 2500k and a p67 - ud3r b3 and 4x4gb corsair vengeance rated at 9-9-9-24 2t 1600mhz

Problem
My cpu aint stable at stock settings under very high intel burn test

My gigabyte mobo automaticall ups the voltage as i increase the multi
I had a hyper 212+ and now i ve bought h100 temps are super low reach 80c at 1.5 v

Dont know my cpu just cant pass ibt very high

Ram xmp profile says profile vtt at 1.2 but qpi/vtt shows 1.05 at every time

I ve tried 4.8 ghz at 1.48v passes 20 runs standard but fail very high

One thing ive noticed....my cpu pass one 10runs ibt and shows the success dialog and if again i run it ....it fails...
Can somebody tell me what os happening...


Want to have my cpu at 5ghz with this cooler but not stable....anyhow

Enabled load line calibration too

Want a stable setting for mainly gaming

Is the intel burn test buggy....

 

[Rockdpm]

...at 1.5v... your crazy

 

[envy14tpe]

First off, i5-2500k should never exceed 1.5V. Actually getting close to 1.5 is very dangerous. At most 1.4V (and that is already too high) I got mine dialed at 1.34V

If you are having issues getting to 5.0GHz then it could be your motherboard. You need at least a 8+4 power phase to reach 4.7. Getting to 5.0 requires a $$ mobo. What is your mobo?

I never used Intel burn test. I always used Prime95.

 

[jaspreetsinghbabbra]

Gigabyte p67 ud3r b3

 

[jaspreetsinghbabbra]

Shud i disable c1e and eist .... to overclock...

Wanted some power savings when cpu not on load....but *** it i really dont care but its just it looks nice

 

[k1114]

I'd suspect it's your ram that is not completely stable. I've seen multiple times where you need to raise the ram voltage when you have all 4 dimms filled.

 

[k1114]

If you are having issues getting to 5.0GHz then it could be your motherboard. You need at least a 8+4 power phase to reach 4.7. Getting to 5.0 requires a $$ mobo.

This is not true, my mobo is 4+1 (z68 pro 3) and am able to get to 4.7 with a 212+ at 1.35v. 4.4 at 1.34v is just an unlucky cpu pick. Most 2500k hit 4.5 at 1.3. The oc club at overclock.net used to have an easy to see chart with everyone's specs and speeds but you can still see what others got. I'd also like to note that cpu phases are not created equal.

 

[jaspreetsinghbabbra]

I'd suspect it's your ram that is not completely stable. I've seen multiple times where you need to raise the ram voltage when you have all 4 dimms filled.

Its running at rated spec at 1.5 v

How much voltage 1.6 or more

Is 10-10-10-20-1t 1867mhz better than 9-9-9-20-1t 1600mhz

Cause it can run at that too...

 

[jaspreetsinghbabbra]

My ram has xmp profile but when i select that it shows profile voltage 1.5 profile vtt 1.2

Cpuz shows incorrect voltage shows qpi vtt as cpu core v .... bugs with gigabyte mobo

It always is at 1.05 wether i select xmp profile or not...

It shud increase i think....

 

[k1114]

I couldn't tell you. It is the same for ocing any component, you need to find what works for you. 1866 cl10 is faster but ram speed makes next to no difference in game performance. http://www.bit-tech.net/hardware/memory/2011/01/11/the-best-memory-for-sandy-bridge/6 I'd just leave it at 1600 cl9 and get it stable.

Don't worry about vtt, it isn't supposed to change with xmp on sb.

 

[envy14tpe]

This is not true, my mobo is 4+1 (z68 pro 3) and am able to get to 4.7 with a 212+ at 1.35v. 4.4 at 1.34v is just an unlucky cpu pick. Most 2500k hit 4.5 at 1.3. The oc club at overclock.net used to have an easy to see chart with everyone's specs and speeds but you can still see what others got. I'd also like to note that cpu phases are not created equal.

I have a Z77 Pro3 and I can't seem to get past 4.4GHz and it is considered a good overclock and I haven't seen anyone do better with this 4+1 mobo. Maybe Z68 is different. Also, I have thought about redoing thermal paste and trying again but 4.4 is good enough. If I could reach 4.8 safely then I'd try. 4.5/4.6 is nil difference.

 

[jaspreetsinghbabbra]

Ao shud i raise the ram voltage or any otherrelated voltage...... and shud i raise qpi vtt voltage

 

[k1114]

Just keep it simple and raise the ram voltage.

@envy You were a bit unlucky in the cpu lottery, nothing you can do about it other than a new cpu. Obviously not worth it. Just don't go around telling this phase requirement nonsense.

 

[jaspreetsinghbabbra]

Ram to 1.575v

 

[envy14tpe]

Just keep it simple and raise the ram voltage.

@envy You were a bit unlucky in the cpu lottery, nothing you can do about it other than a new cpu. Obviously not worth it. Just don't go around telling this phase requirement nonsense.

@k114. I'd love to see someone with my mobo reach 4.5GHz or higher, but it isn't possible while keeping under 1.4V. I'm ok with my 2500k.

 

[jaspreetsinghbabbra]

I think started this topic.....my cpu my machine...

 

[k1114]

Well is it stable at the voltage? Memtest may be easier to test.

@envy, Took me like 5 seconds to google, http://www.overclock.net/t/1259685/how-far-can-one-push-a-4-1-power-phase-2500k-asrock-z77-pro3 There plenty of others too. Your cpu is the issue, not the mobo. But enough hijacking this thread.

 

[jaspreetsinghbabbra]

It is not stable till yet i gave 1.580 to ram and 1.100 to qpi vtt....
Not stable....fails on second run of very high intel burn test....

 

[jaspreetsinghbabbra]

Seems found the sweet spot.....

I5 2500k @ 4.8 ghz @1.43v @qpi vtt 1.20 @ram 1.6v

Passes very high 10 pasess several times....

Tried for 5ghz but heat limited on a h100 even

5ghz didnt stabilize at even 1.51v temps were 87c max and package went to 98c max..... waswilling to give more voltage but never mind can play with 1fps lower at 4.8ghz stable.

Fuckin h100 shud had bought custom water loop.

At 4.8 ghz at 1.43 max temps were 74 c package was at 83c

 

[jaspreetsinghbabbra]

Idle temps are 20c

 

[ericjohn004]

You know Intel Burn In Test will give you about 10-15c higher than almost any other program you run. If your temps are only 74c during IBT then you could probably overclock higher. I let my temps get up to 95c during IBT before I get worried. Because under prime95 my temps are only 75-80c. Which is safe.

I use IBT to test my highest synthetic temps and I use prime95 to test what my highest real world temps will probably be. I also use IBT to test for stability because prime95 won't cause a blue screen for me even though I'm not stable during IBT.

 

[jaspreetsinghbabbra]

Max qpi vtt voltage ???

 

[jaspreetsinghbabbra]

It again went mad and wont stabilize again.....

 

[jaspreetsinghbabbra]

How to check ram....

 

[k1114]

Put everything to stock and use memtest. Could one of your sticks be bad?