Help overclocking my E6750 alittle more!?

[ATOJAR]

Ok guys i could do with alittle help here! got my e6750 running stable at 3.2GHz, any higher and i get a blue screen of death just after the windows loading bar! ...... ive tried my memory timings at 5-5-5-15 with 2.40v ..... also tried the cpu voltage right up to 1.45v running a 1:1 ratio ..... anybody got any thing i could try?(system specs are in my sig)

ive alos tried turning off both speedstep & C1E support.

[tacos4me]

What does the blue screen say? Also make sure you've disabled any spread spectrum settings.

[mullet]

I think your ram is holding you back, you will need to go beyond 400fsb to make a difference. You will have to use 401fsb and above to get past the stepping on that NB. Say 425x8=3.4, with the ram you have you would need loose timings and the rated volts that your ram set for.

[ATOJAR]

what? looser timings than 5-5-5-15?

[Xion X2]

He has 800MHz memory, so that shouldn't be posing a problem if he's running a 9x multiplier (which he should be.) His memory is probably overheating.. you need to back the voltage way the hell down. No one needs 2.4v for 800MHz RAM. I'm running mine at 834MHz on 1.9v...

Try upping the voltage a little more on the CPU if backing down the voltage on the RAM doesn't help. If that doesn't work then increase the voltage on your northbridge by one tenth of a volt.

[Revs]

what? looser timings than 5-5-5-15?

U tried lowering the multiplier?? I've seen them CPU's running 4.0. Mine'll go to 3.7 but there is no performance gain cos this Striker has a stupid 420mhz FSB strap. I couldn't get past about 3.2 with 9x but 8x gives me alot more scope for CPU clocks.

As u can see in my sig i've not had to increase the timings either.

Xion's right about the vCore too. Going from 1.45 to 1.5 enabled a huge leap in overclockability for me. Just make sure it's an actual 1.5v and not a 1.5v setting. Mine's set to 1.525v on Auto which gives me a totally stable 1.5v (actual).

[ATOJAR]

heres what i have at the moment(see attachment)

the error messages i get in the bios says "IRQL_NOT_LESS_OR_EQUALS"

or

if i put the memory timings any higher i get this message "MEMORY_MANAGEMENT"

[Revs]

What's the default multiplier?

[Xion X2]

Look, just set your multiplier at 9x in your BIOS, set your FSB at 378, set your RAM at 756, and set your CPU voltage at 1.5v. That outta get you stable at 3.4GHz. 1.5v should allow you a ceiling all the way to 3.5GHz or so just by increasing the FSB a little at a time and setting your RAM exactly twice your FSB speed.

But for heavens sake.. reduce the voltage on your RAM before it melts into your memory slots. 2.0-2.1v should be enough.

What's the default multiplier?

Should be 9x with that proc, but some mobos will default to 8 for some reason. He definitely needs to set that to 9 since he has 800MHz RAM.

[ATOJAR]

6 i think.

[ATOJAR]

i cant set the multiplyer to 9 ... 8 is the highest.

[Xion X2]

i cant set the multiplyer to 9 ... 8 is the highest.

Are you sure that motherboard won't allow you to set a 9x multiplier!?

[Revs]

Surely there'll be some scope for OCing the RAM. Mine goes up to about 880mhz before it starts to loose performance.

[ATOJAR]

Are you sure that motherboard won't allow you to set a 9x multiplier!?


just checked .. 8 is the highest, 6 is the lowestt. :headexplode:

[Revs]

The default on that CPU is 8x. But the max temp is 72 deg and the max vCore is 1.5v according to Intel.

Interesting, both these specs are far higher than mine. Intel says 62 deg and 1.33v for mine so there should be no worry about using 1.5v.

http://processorfinder.intel.com/Details.aspx?sSpec=SLA9V

[Xion X2]

just checked .. 8 is the highest, 6 is the lowestt. :headexplode:
Too bad.

Alright, then set your FSB @ 425MHz (1700) and your RAM at 850MHz. Set the voltage on your RAM anywhere from 2.0-2.1 but no higher. Keep the same voltage on the CPU and see if it's stable by running Orthos small FFTs. If it's still not stable, first increase your NB voltage by one tenth; if still not stable, increase CPU voltage to 1.47 and try again.

[Xion X2]

The default on that CPU is 8x. But the max temp is 72 deg and the max vCore is 1.5v according to Intel.

Interesting, both these specs are far higher than mine. Intel says 62 deg and 1.33v for mine so there should be no worry about using 1.5v.

http://processorfinder.intel.com/Details.aspx?sSpec=SLA9V
Hmm, good find. I didn't take into account the 1333FSB. That would certainly explain why he can't set it to 9x. :p

[Revs]

I'm not trying to crap on Xion here cos I know he's got far more experience than me, but I would say:

8x, 1.5 vCore, 800mhz FSB (or 1600mhz depending on how your BIOS displays it), 1:1 ratio RAM (try messing with the 'sync' setting if ya have it), 2.2v on ya RAM and set your timings to 'Auto' while you're messing with the CPU.

Work up from here 5mhz at a time. When you find the max OC, start messing with the timings a bit.

Hmm, good find. I didn't take into account the 1333FSB. That would certainly explain why he can't set it to 9x. :p

Just type 'intel support' in to Google and put your CPU no. in the box on the Intel page. They're all there, right back to the P4's.

EDIT: Just checked here >> http://images.crucial.com/pdf/datasheets/Ballistix240-pinDIMM.pdf Your default memory voltage is 2.2 -+.1

I'm going to bed now dude so good luck and I hope it works out well for ya! ;)

[Xion X2]

I'm not trying to crap on Xion here cos I know he's got far more experience than me, but I would say:

8x, 1.5 vCore, 800mhz FSB

Not a problem, because I needed to be corrected on the multiplier. But you may want to edit that last post to say "400MHz" FSB just so he doesn't get confused. :)

Overclocking is something that comes easy from experience but is tough to communicate to someone else over the web. Most BIOS' usually vary in one way or another which doesn't make it any easier.

[ATOJAR]

Well i lowered the memory to 2.00v ... set the cpu to 1.5v and have so far managed to get the memory to just over 900MHz .... and the cpu to just over 3.6GHz :D ideling at 40c - 41c .... that temp to hot? ..... gonna try lowering the voltage and do some Orthos stress testing.

[Xion X2]

Temps are about where they should be, and it looks like you're on the right path.

[ATOJAR]

So what do you think a safe load temp i shoulk keep this cpu under is?

[Xion X2]

So what do you think a safe load temp i shoulk keep this cpu under is?

62C. Keep in mind that Orthos/Prime will push a CPUs temps much higher than other applications will. But for long-term benching try to keep it under 62C.

[ATOJAR]

Ahh .. well im below that with Orthos so far, highest ive seen is 57c! .. its usually lower than that .. 54c - 55c! .... just trying to get the voltage stable now! .... so far at 1.42v and stable after 10 mins Orthos testing.... long way to go yet lol ... would like to see at least 8 hours stable.

[Xion X2]

Make sure that you're running the small FFTs torture test and not large FFTs or Blend. Small FFTs stresses the overclock more. If you're at those temps when running that test around 1.5v then you're in good shape.