Prime failiing on core #1 then core #0

corkyo4

corkyo4

corkyo4

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Joined
19 Dec 2009
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68
Have been running prime to test the stability of my system now its overclocked, but i keep getting an error on core #1 then on core #0 within the space of a minute or so.

Mobo - Asus P5QC
Memory - Corsair XMS2 DDR 2 1066Mhz 4GHz 7-7-7-20 2.0 volts
CPU - Intel E8500 3.16 @ 4.00GHz (9.5 * 424)


Memory timings are inputted manually, and DRAM Frequency is running at something like 1060MHz (the max before exceeding the limit set by the FSB i cant remember the exact value)

NB Voltage - 1.44
SB Voltage - 1.20
VCore Voltage - 1.30
Memory Voltage - 2.00

Have tried increasing the vcore to 1.33 and the NB to 1.5 and SB to 1.30 but the situation is the same.

Current temperatures for cores #0 and #1 are 40 degrees unloaded but have been upto 56 degrees loaded

Any Thoughts??


Thanks

Tom
 
you need more vcore mate, no point upping the nb to 1.5, it simply doesn't need that voltage. drop the nb down to 1.35, run the memory at the rating it states in cpu-z, and stick some more volts through the cpu ~1.4 should be your max :)
 
twist3d0n3 said:
you need more vcore mate, no point upping the nb to 1.5, it simply doesn't need that voltage. drop the nb down to 1.35, run the memory at the rating it states in cpu-z, and stick some more volts through the cpu ~1.4 should be your max :)
Click to expand...

When you say run the memory at the rating in cpu-z, which rating do you mean?
 
made those changes, i have dropped my dram freqency down to 863MHz (i think it was that) and that seems to have sorted it, along with the voltage changes.

Ill have to try the memory on increased speeds to see if it is that or not.
 
i had the same issue on my Q8300 setup with my 1066 ddr2 ram.
on my biostar mobo i could lock it down at 800mhz and i could get really good oc's, but when i 'upgraded' to the p5q-e mobo it wouldnt let me fix the ram to 800mhz it adjusted it according to the cpu fsb so i could never get a stable overclock.
 
paradisiac said:
i had the same issue on my Q8300 setup with my 1066 ddr2 ram.
on my biostar mobo i could lock it down at 800mhz and i could get really good oc's, but when i 'upgraded' to the p5q-e mobo it wouldnt let me fix the ram to 800mhz it adjusted it according to the cpu fsb so i could never get a stable overclock.
Click to expand...

Yeah to be honest im wondering if it is my memory as i think i essentially solved this a while back but was greedy and wanted to use the ram to its full potential.

However CPU-Z implies the ram is pc-6400 which would give an 800MHz limit however on my invoice, the memory module itself and the corsair website it states pc-8500 which gives 1066MHz.

The fact that i cant get over the 800MHz threshold would suggest my memory is not what it seems, but as im not throughly clued up on such matters i wouldnt really know the true answer.

It is a bit frustrating though!!!
 
corkyo4 said:
Yeah to be honest im wondering if it is my memory as i think i essentially solved this a while back but was greedy and wanted to use the ram to its full potential.

However CPU-Z implies the ram is pc-6400 which would give an 800MHz limit however on my invoice, the memory module itself and the corsair website it states pc-8500 which gives 1066MHz.

The fact that i cant get over the 800MHz threshold would suggest my memory is not what it seems, but as im not throughly clued up on such matters i wouldnt really know the true answer.

It is a bit frustrating though!!!
Click to expand...

my ram was exactly the same, every bit of info stated that the ram was 1066 apart from cpu-z which indicated it was only 800mhz, and apparently thats all it was stable at, so not sure how these companies work it out, but i certainly dont think it was suited for running at 1066
 
corkyo4 said:
When you say run the memory at the rating in cpu-z, which rating do you mean?
Click to expand...

i mean rated voltage for the given frequency; say it's 1066MHz ram, that needs 2.1 volts to operate at that frequency, you should run it at that. you might be able to drop it a few notches, i managed to get my dominator 1066MHz ram running at 1066MHz @ 2 volts :)

if you're not running the ram at it's rated frequency, obviously you can drop the volts a bit, do it a notch at a time and boot, then check for stability, as soon as you hit instability, stick it up a notch or 2 again.

also, with the ram, to squeeze a tiny bit more performance out of it, try tightening the timings; my (already mentioned) dominator ram, stock timings were 5-5-5-15, i got them working fine at 5-5-4-14 :)
 
paradisiac said:
my ram was exactly the same, every bit of info stated that the ram was 1066 apart from cpu-z which indicated it was only 800mhz, and apparently thats all it was stable at, so not sure how these companies work it out, but i certainly dont think it was suited for running at 1066
Click to expand...

1066 ram is 'overclocked' 800 ram, so even though it's rated to run at 800, it's perfectly capable of 1066 if you use the JEDEC rated voltage
 
twist3d0n3 said:
1066 ram is 'overclocked' 800 ram, so even though it's rated to run at 800, it's perfectly capable of 1066 if you use the JEDEC rated voltage
Click to expand...

i set it to exactly what the companies site, the sticker on the box, and the sticker on each stick of ram, they were all the same numbers, but it would not run stable with any stick in any slot, so i gave up trying and bought an i7 setup instead, running at 1890mhz stable now :)
 
i was gonna upload a picture of my cpu-z read out for my memory but i cant attach an image.

ohwell, ill just have to have a play around with it.
 
paradisiac said:
i set it to exactly what the companies site, the sticker on the box, and the sticker on each stick of ram, they were all the same numbers, but it would not run stable with any stick in any slot, so i gave up trying and bought an i7 setup instead, running at 1890mhz stable now :)
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:O that's mental! how much was that ram if you don't mind me asking?

i think 1600MHz ram is fine, i'm using 1600 dominator and i've got up to 4.5GHz :D not hugely stable at decent voltages so sticking with 4.2 ;)

corkyo4 said:
i was gonna upload a picture of my cpu-z read out for my memory but i cant attach an image.

ohwell, ill just have to have a play around with it.
Click to expand...

get an account with imageshack or something similar, then use the posting option to give you the forum code, stick it in the message box and it'll show up on here - just keep it to about 800x600 res ;)
 
twist3d0n3 said:
:O that's mental! how much was that ram if you don't mind me asking?

i think 1600MHz ram is fine, i'm using 1600 dominator and i've got up to 4.5GHz :D not hugely stable at decent voltages so sticking with 4.2 ;)
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if you were refering to the ddr2 1066 then it was £27 per pair (2x1GB). if you are reffering to the ddr3 1866, then that was just short of £120 (3x2GB Tri Channel)
 
ahh i see; mine does 8-8-8-24, which is quite a bit different. still, i think i paid about 50 quid more than you!

edit: mine doesn't seem to mind running upto about 1700MHz tho, so i suppose they're pretty good :D
 
twist3d0n3 said:
ahh i see; mine does 8-8-8-24, which is quite a bit different. still, i think i paid about 50 quid more than you!

edit: mine doesn't seem to mind running upto about 1700MHz tho, so i suppose they're pretty good :D
Click to expand...

mine are running at 1890mhz at the mo, maybe i could play with them to get them running a bit better, but right now i dont see any need.
out of intrest, are you running win7?
 
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