Phenom X3 8750 crash problems

1225 Views 27 Replies 5 Participants Last post by TEntel, Mar 11, 2009

mikeyk365

Discussion Starter · Mar 10, 2009

i know my temps are good and i can run anything in windows good except for games and prime95. when i run prime95 my third core freaks out and fails its test. i have a cpu-z in the tag below. voltage is 1.35v any ideas??

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XxBeNigNxX

· #2 · Mar 10, 2009

If your temps are fine, Give it a little more Vcore.

Your at 1.35v vcore so next try 1.375v, if that doesn't work try 1.4 and so on. Just keep trying

Some cpu/Mobo Combo's you have to play with different voltages (example-Vcore,NBvid,SB etc.)

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mikeyk365

Discussion Starter · #3 · Mar 10, 2009

anyone recommend good voltage ranges??? im a lil inexperienced at oc'ing nb voltage and all that...

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XxBeNigNxX

· #4 · Mar 10, 2009

Just work with your Vcore for now....And make sure to test stability between changes.

You really only need to adjust other voltages if changing the Vcore doesn't help.

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mikeyk365

Discussion Starter · #5 · Mar 10, 2009

right now im up to 1.4v and prime ran for a minute and a half before 2 of my cores crashed... im idle 39c that too high for an idle temp??

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TEntel

· #6 · Mar 10, 2009

Are you using ACC?

What is the highest you have stable?

Personally, I need 1.4v to be stable at 2.9 GHz, so I would say you are doing fine.

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mikeyk365

Discussion Starter · #7 · Mar 10, 2009

i am.. i jacked it up to +12%, so i know the cores are very flexible for oc'ing now. im runnin windows at 3.1ghz stable but the thing is any games i load, or runnin prime95, it crashes a core and then the program.. its drivin me crazy!! what about the hypertransport speed?? maybe turn that down?? i heard that relieves stress on the cpu..

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XxBeNigNxX

· #8 · Mar 10, 2009

This may be a case where ACC could help you with that core.

It maybe a weak core, so maybe underclocking that core may help (Just a Thought)

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TEntel

· #9 · Mar 10, 2009

But what is the highest you've had it prime stable?

Lower ACC back down to 2 or 4. You can set it individually for each core.

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mikeyk365

Discussion Starter · #10 · Mar 10, 2009

prime ran for a minute and a half before cores started to crash.. im going to reset my acc and try more oc'ing through overdrive.. i shall return in a moment.

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TEntel

· #11 · Mar 10, 2009

So have you had a stable run of prime at any OC?

You can't just jump into it. Start at the bottom and work your way up.

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mikeyk365

Discussion Starter · #12 · Mar 10, 2009

i set core0 at +2, core1 at +4, core2 at +4, and left core3 at -2. maybe lowering my bus speed and increasing the multiplier?

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mikeyk365

Discussion Starter · #13 · Mar 10, 2009

i had it runnin 24/7 for a week on 3.0ghz. 3.1ghz crashes in a minute

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TEntel

· #14 · Mar 11, 2009

Are you OCing via multiplier, or reference clock?

I've found that sometimes droping the multi a step and raising the ref clock adds stability.

On the flipside, if you are OCing by ref clock, then your northbidge and HT link will need voltage.

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mikeyk365

Discussion Starter · #15 · Mar 11, 2009

im doin a mix of both.. multiplier is at 14x and bus at 221mhz. 1.3625v for core, 1.175 for nb.

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TEntel

· #16 · Mar 11, 2009

Hmmm, that is kinda low for the NB.

Did you pick that voltage on a whim, or is it specified in the mobo manual?

As far as I know, 1.25v is stock. I'm running at 2200 MHz, 1.33v

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TEntel

· #17 · Mar 11, 2009

Actually, just to clarify, I'm talking about the processor-nb voltage.

I believe the other voltage options are

HT link 1.2v
core pll 1.1v
nb (something) 1.8v

NOTE: these voltages are specifically for my board, but we have very similar boards, and probably the same bios.

Also, sb voltage is 1.2 for the sb600.

You have the sb750 though, so it may be different.

Also, Phenoms get hungry for sb600 voltage, that may or may not hold true for sb750.

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skugpezz

· #18 · Mar 11, 2009

I took mine all the way up to 1.6v

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mikeyk365

Discussion Starter · #19 · Mar 11, 2009

current voltages.. all set back to default after system crashed a minute ago.. so i know they're stock, except for the core of course. default is 1.250v.

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skugpezz

· #20 · Mar 11, 2009

Quote:

Originally Posted by mikeyk365

current voltages.. all set back to default after system crashed a minute ago.. so i know they're stock, except for the core of course. default is 1.250v.

I took mine all the way up to 1.6v, but i am now at 1.5v stable at 3.1ghz

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