Help me find the weak spot in my overclock.

[BlueAcolyte]

Ok, before, I had my E4500 stable at a 33% OC to 2.93GHz at stock voltage. Then now I tried for 3.30GHz to make it a round 50%.

EIST and C1E were disabled.
VCore was 1.387.
It posted and passed an hour of Prime95 at 6 x 300 and 6 x 334.
But no matter what, I can't get it to boot to windows (passes post) at 11 x 300.
RAM is running at 1:1 and normal voltage (2.0V, it's EPP)

Do I just need more VCore? I am leery of boosting my VCore up by .1V just to squeeze out another 400MHz. I've already corrupted my Vista MBR twice. (fixed both times)

Edit: It rebooted during prime95 at 11x273 and 1.337V. I don't think I'm limited by FSB somehow.

 

[BolleY2K]

Didn´t you touch your NB voltage yet?

 

[BlueAcolyte]

No, but I thought that most motherboards are supposed to do 333FSB on default as because of Intel's 1333FSB CPUs? I only have two sticks of RAM.

 

[error8]

Increase the cpu voltage further. You do have an aftermarket cooler on it?

 

[BlueAcolyte]

CM HyperTX2, still only at 50C at load.

 

[imported_Scoop]

Mmmmmore voltage!

 

[BlueAcolyte]

This is absurd...

 

[error8]

Well, the maximum voltage that Intel states for your chip is 1,5 V, so 1,45 V should be perfectly safe if you can keep those temperatures low enough. You could even cross that limit, like I'm doing, 'cause low vcore is so gay...

 

[BlueAcolyte]

I know, but for 370mhz? I'm not a hard-core overclocker, and I can't abuse my computer because I can't return parts at will and I already have all my progs installed.

 

[Foxery]

Er, what other steps have you tried inbetween? (3100, 3200mhz) That's a hell of a leap to just reach for out of the blue.

Based on your edit saying it failed at 3000, the usual solution is to get a bigger hammer. More voltage!

 

[betasub]

Originally posted by: Foxery
More voltage!

You heard the man.

I tested at 1.5Vcore (BIOS, less some for droop) to get 11x300 stable, but I don't have great cooling so I've settled on 8x400 with 1.425Vcore. If you increase your core speed in smaller steps, you should only need small increments in Vcore.

 

[imported_Scoop]

I would like to add to my previous 'more voltage' comment that turn your C1E and EIST 'on' as no-one is telling you to run your chip at that voltage all the time. That would be crazy.

 

[error8]

Originally posted by: Scoop
I would like to add to my previous 'more voltage' comment that turn your C1E and EIST 'on' as no-one is telling you to run your chip at that voltage all the time. That would be crazy.

I don't see any difference in voltage with C1E and EIST disabled. Only the multiplier decreases in idle.

 

[BlueAcolyte]

But C1E and EIST reduce stability, right? I will turn those on when I can actually get it stable period.

Edit: booted into windows at 9x334FSB, 1.425 VCore and +1 to FSB and MCH (northbridge, right)

 

[BlueAcolyte]

Computer rebooted, but that was because the power went out.

 

[toadeater]

Originally posted by: BlueAcolyte
But C1E and EIST reduce stability, right? I will turn those on when I can actually get it stable period.

Edit: booted into windows at 9x334FSB, 1.425 VCore and +1 to FSB and MCH (northbridge, right)

C1E doesn't reduce stability on Core 2 Duos and it helps to keep the CPU slightly cooler. Usually EIST is disabled once you set the voltage manually.

Since you raised the FSB and MCH and seem to be stable now, try lowering the CPU voltage a little. Once that's stable on the lowest possible voltage, see if you can set FSB back to normal. It was most likely the MCH that needed more voltage over 333 FSB.

 

[aigomorla]

turn off EPP.

I heard that botches OC sometimes. EPP is a joke really.

Blue what sink you using? Id say do the overclocking in reverse order. C2D + board combo's will have funky walls.

MEaning it can fail where your trying, however if you jump higher fsb, like 450x8, that sometimes allow you to bypass these walls.

You need to jump around to find out where your walls are. If you only know 1 wall, you havent been playing around with it enough.

Reverse Order means YOU RAMP up voltage to MAX your system can handle/what you want, and scale down.

 

[BlueAcolyte]

Well, my CPU is being a bitch. On the bright side, I have a real cute yorkie terrier to play with while Prime runs. I ran 356 x 9 (for 3.2GHz) at 1.45V, but it fails prime after a bit. So you're saying I should check if I'm FSB limited or not by lowering the multiplier and raising FSB. I don't want to raise voltage further, but my temps are fine. I am using a CM HyperTX2 and my temps reach 62C during prime. Although it is pretty cool today... I'm guessing I have 23-25C ambient.

Edit: when I reported I booted into windows at higher speeds, I hadn't tested with Prime95 yet.

 

[BlueAcolyte]

going for 8x400 later today.

 

[imported_Scoop]

Originally posted by: error8

Originally posted by: Scoop
I would like to add to my previous 'more voltage' comment that turn your C1E and EIST 'on' as no-one is telling you to run your chip at that voltage all the time. That would be crazy.

I don't see any difference in voltage with C1E and EIST disabled. Only the multiplier decreases in idle.

My voltage drops from 1.464V to 1.352 with C1E and EIST enabled read by cpu-z.

 

[o1die]

Have you tried the 1333 pin mod? I know the 1066 pin mod works well on my e4300; had to use it on a compaq board with no bios adjustments. Fry's sells some copper tape for around $3, or you can try rear defroster repair kits for the conductive solution.

 

[BlueAcolyte]

But I can just set 333FSB in my bios... I think I can change the strap or simply force it by using 334FSB.

 

[geoffry]

Originally posted by: Scoop

Originally posted by: error8

Originally posted by: Scoop
I would like to add to my previous 'more voltage' comment that turn your C1E and EIST 'on' as no-one is telling you to run your chip at that voltage all the time. That would be crazy.

I don't see any difference in voltage with C1E and EIST disabled. Only the multiplier decreases in idle.

My voltage drops from 1.464V to 1.352 with C1E and EIST enabled read by cpu-z.

Did you manually set your voltage in the BIOS or is it on auto? Mine always stays the same with the power saving features on, just the clock changes.

I've also heard that the power savings features only touch the voltage if its set as auto in the BIOS, I've never bothered to see what that hits me with cause I guess I'm lazy or that I prefer being in control.

 

[imported_Scoop]

Originally posted by: geoffry

Originally posted by: Scoop

Originally posted by: error8

Originally posted by: Scoop
I would like to add to my previous 'more voltage' comment that turn your C1E and EIST 'on' as no-one is telling you to run your chip at that voltage all the time. That would be crazy.

I don't see any difference in voltage with C1E and EIST disabled. Only the multiplier decreases in idle.

My voltage drops from 1.464V to 1.352 with C1E and EIST enabled read by cpu-z.

Did you manually set your voltage in the BIOS or is it on auto? Mine always stays the same with the power saving features on, just the clock changes.

I've also heard that the power savings features only touch the voltage if its set as auto in the BIOS, I've never bothered to see what that hits me with cause I guess I'm lazy or that I prefer being in control.

I've set it to 1.5025V in BIOS. Maybe this is a board/bios related issue if it stays the same all the time?

 

[geoffry]

Originally posted by: Scoop

Originally posted by: geoffry

Originally posted by: Scoop

Originally posted by: error8

Originally posted by: Scoop
I would like to add to my previous 'more voltage' comment that turn your C1E and EIST 'on' as no-one is telling you to run your chip at that voltage all the time. That would be crazy.

I don't see any difference in voltage with C1E and EIST disabled. Only the multiplier decreases in idle.

My voltage drops from 1.464V to 1.352 with C1E and EIST enabled read by cpu-z.

Did you manually set your voltage in the BIOS or is it on auto? Mine always stays the same with the power saving features on, just the clock changes.

I've also heard that the power savings features only touch the voltage if its set as auto in the BIOS, I've never bothered to see what that hits me with cause I guess I'm lazy or that I prefer being in control.

I've set it to 1.5025V in BIOS. Maybe this is a board/bios related issue if it stays the same all the time?

It might be. I have a DS3R on an ancient BIOS, I think f4.