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To all those doing IBT/LinX on their Phenom II's - Page 3

post #21 of 27
And how long to run prime for? It's been going nearly 5 hours and i'm sick of it!!
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post #22 of 27
Found one more thing linpack is good for yesterday. Ran IBT for an hour at 3.8 since it was cold enough to do so (outside was -20F) and it passed. Ran prime all day, passed. Then the heat caught up so I ran another run of IBT.

I'll be daggum, the thing throttled! I was wondering where my weird time readings were coming from. I just happened to be looking at the killawatt and it was sitting right at 335 and suddenly dropped to 160 watts for 5 seconds before going back up. It didn't fail the test but when this happens the time reads 0.000 or something close to that (0.0012? forty thousand gigaflops?). I know someone will ask, in the morning peak temp was 52C, in the evening when it throttled it got to 58C.

Not sure if it was the mainboard or the cpu, but it was definitely one of the two. That many watts thru the 4-pin connector is kinda scary though! Let it fall into CnQ and it pulls 106 watts...
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post #23 of 27
Thread Starter 
While LinX has the option to utilize more ram, the factor with the new architectures from Intel and AMD is the uncore (NB/IMC). You can use all the ram you want but in the case of IBT/LinX I have experienced through testing that the uncore doesn't get stressed.

The reason I narrow down to AMD is because there is a rather tight knit relationship between the NB/IMC and the ram. If one is slightly unstable, it can cause errors in the other. However both of these do not affect the core clock when stress testing with IBT. Prime 95 starts off with ram/NB/IMC stress, and moves on to smaller FFT's to stress the cores.

But yes, I would recommend using both. However if you pass IBT but do not pass Prime, you'll know why. The ram or IMC.
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ISS
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post #24 of 27
Quote:
Originally Posted by Slappa View Post
While LinX has the option to utilize more ram, the factor with the new architectures from Intel and AMD is the uncore (NB/IMC). You can use all the ram you want but in the case of IBT/LinX I have experienced through testing that the uncore doesn't get stressed.

The reason I narrow down to AMD is because there is a rather tight knit relationship between the NB/IMC and the ram. If one is slightly unstable, it can cause errors in the other. However both of these do not affect the core clock when stress testing with IBT. Prime 95 starts off with ram/NB/IMC stress, and moves on to smaller FFT's to stress the cores.

But yes, I would recommend using both. However if you pass IBT but do not pass Prime, you'll know why. The ram or IMC.
Interesting.

So the Uncore is the NB and IMC on die.

I will have to change my stressing habits then.
post #25 of 27
Yep, when i tried oc'ing mine, i passed 10 ibt maximum yet blue screened small fft in 2-3 mins. i was so annoyed.
    
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post #26 of 27
I ran 500 passes of LinX with max memory, and that passed fine. Then I went to run Prime blend and it failed in the 15th hour. Had to bump up CPU-NB voltage to get my setup 24 hours Prime blend stable. A little excessive, some say, but I like having a rock stable system. I've also been in situations where Prime has run fine for a while and LinX has failed within the first couple minutes, so I always run both.
post #27 of 27
Thread Starter 
Quote:
Originally Posted by smash_mouth01 View Post
Interesting.

So the Uncore is the NB and IMC on die.

I will have to change my stressing habits then.
I think what people don't realize is that ram is very touchy on Phenom II. It takes a little bit of fine tuning to get it all stable.
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ISS
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