prime95 blend test - machine check exception

lemzip

lemzip

lemzip

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1 Sep 2005
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Any ideas? Only happens on the blend test, small and large are no probs.

running a athlon x4 630 @3.5Ghz
G Skill 1600Mhz @ 8-8-8-24 divider at 677
OCZ 600W
Asus board in sig :)

cheers
 
yep, up to 1.3, would any higher reallu help?

very off this setup, it should pull 3.5Ghz @ 1.35 volts or so, this one needs 1.425 for 3.5Ghz.

Others will clock to 3.8Ghz easy, this gives up at 3.5 even if i push the vcore to 1.5625, NB to 8 or 9 x, htt link to 1200Mhz and ram dropped to the 400 divider!
 
Hey lemzip,

so wheres our CPU-z screenies! :)

So your having Prime Blend Errors at 14x250 yeah, I'd like to see more how your memory is set-up? I've only used the DDR2 boards but are you sure your using the best memory multiplier?

The CPU-NB will be different on each chip but the one I am testing atm (AIIX3425) is happy running 2.5GHz on the CPU-NB with just 1.225v, can't see why yours would need much more?

I think the chip may need 1.55vCore for the big clocks, how are your temps now?

You may have to have a tinker with the memory settings/timings, keep an open mind and you discover a way to get past this technical barrier before you, good luck! :cool:
 
This memory has given me nothing but trouble so far. Incorrect SPD's, didnt used to work at other dividers until the last bios update (however spd incorrect and sometimes wont boot at manual timing even though they are right for current ram speed.

I will do some cpu-z screenies tonight for you. current idle woth CnQ enabled(i disable it for OC) is 18C with load at around 42-45 depending if my heating is on/off.

I have never seen 50C with this chip under load,48C is about norm, OC to 3.5 and running prime for 4-5hours which is strange as really the cpu is hitting 1.425 and should prolly be pulling more heat with the vcore running so i am unsure if i 1. have a pita of a chip or 2. the vcore is incorrect in bios/cpu-z. I have seen this once before however dont have a multimeter at hand to test and i dont know if this is really common or i just have bad luck and my chip sucks!
 
lemzip said:
This memory has given me nothing but trouble so far
Click to expand...
You know it may be due to that? Which Ripsaws are you using btw? (model number?) . . .

It could also be your silicon topping out at around 3500MHz? . . . but strange that Prime passes Small FFTs and Large-In Place FFTs but fail Blend? . . .Are you positive your testing is methodical? could it have failed Small FFTs if you gave it long enough to run?

Can't see anything obvious there but jeeps a northbridge @ 2.5GHz and Memory at 1.66GHz is an insane speed! :eek: . . . most likey will require tweaking, wish I could help more but I have no experience of DDR3 or memory running faster than 1.2GHz :cool:
 
here is the memory spec, could well be as i can run prime @ 3.75Ghz on large or small ftt, around 6-7 hours testing and it keeps on going but thats all i sleep for so not sure if i ran it longer but 7 hours SHOULD be okay??

G.Skill Ripjaw 4GB (2x2GB) DDR3 PC3-12800C8 1600MHz Dual Channel Kit (F3-12800CL8D-4GBRM)

I have lowered my multiplier from 677 to 533 now and will retest @blend but i have tried so many combinations. I would just like to see if this is memory specified without having to fork out for more ddr3 however i know no one who has moved up from ddr2 to 3 but me that i know!

cheers
 
lemzip said:
G.Skill Ripjaw 4GB (2x2GB) DDR3 PC3-12800C8 1600MHz
Dual Channel Kit (F3-12800CL8D-4GBRM)

MY-042-GS_400.jpg


I have lowered my multiplier from 677 to 533 now and will retest @blend but i have tried so many combinations.
Click to expand...

Out of interest how do these sticks get set-up by the BIOS if left on Full [Auto]? . . . do they default straight away to full speed or?

I know what it can be like trying to nail an elusive stability issue like your having but keep in there and I'm sure you will sort it. If in doubt about the memory you could always do some single stick testing as its not impossible one of your sticks could have a slight defect, it does happen and one single flaw like that will show up in Prime Blend if you leave it running long enough . . .

I'm not sure what O/S you are running but if it's 64-bit I recommend you download and use this app for NB/Memory testing, oldie but goodie!

*Memtest* - RAM reliability tester for Windows

If your getting errors in Prime Blend and you also get an error in Memtest you have a problem that needs sorting one way or another, could be faulty hardware or most likey a faulty mem/timings config . . . The single stick testing will help remove any doubt you may have about the memory being sub-standard.

I'm still getting to grips with the new AMD silicon myself, the way it acts and which voltages are best etc. I've had similar issues to what you are having with the chip at around 3500MHz, that's with a Rana Triple-Core which is the same silicon as your Propus however I didn't have much time to look into it further and just reduced the speed back down a few notches until I have a few hours spare for tweaking.

Patience is the key really, you have a great set-up there and I'm sure if you stick at it that hardware will fly away! :p . . . your using very new technology so it takes a while for people to figure out the puzzle! :cool:
 
yep, tried them both, no errors on memory.

I think i have a pita of a chip, my mate who bought the same setup as me will be coming round hopefully friday and we can test his chip however he has stock cooling.

Bit gutted but guess the extra 200Mhz i was aiming for dont make a world of difference and a 700Mhz overclock without doing much is not bad.
 
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October, i can assure you, i have tried EVERYTHING! i can think of. I think i will sell this on and get a 620. Do you think it could be the board/ram as the cpu really seems to like volts and it will prolly be easier to get a chip to test then board/ram.
 
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memset suggests my cpu is not supported?

I have dropped the multiplier to 400 and things seem to go up a little more, loadline calibration at suggested 19%.

Will do some more screenies tonight, cheers for your help fella!
 
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