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7870 Memory errors in memtestCL

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first here is memtestCL basically memtest86 for your GPU: http://folding.stanford.edu/English/DownloadUtils

the card in question: HIS IceQ X H787QN2G2M Radeon HD 7870 GHz Edition 2...

I recently bought a HIS Radeon 7870 and had to return the first one because it was giving me occasional desktop corruption which I thought was the RAM. I just got my second one and ran memtestCL again and got the same amount of errors on the same test.
I ran the program testing 2000mb of my vram (default is 128mb) and get errors on the random block test. During the time i was waiting for the replacement 7870 I had run the test on my 5850 (but only tested 1000mb cause it only has 1024) and it got zero errors even when it was overclocked to 945/1175mhz. If I down-clock the 7870's core to 750mhz and up the voltage to 1.3 the errors go away.

My question is can you guys run the test with the same parameters on your 7000 series cards and see if you get the same errors? I want to see if this is normal or if I should just return and keep my 5850 until their next series comes out.

To run the program with manual parameters find it with run and add 2000 (or just under max vram amt) 5 like this: C:\Users\****\Desktop\memtestCL-1.00-windows\memtestCL-1.00-windows\memtestCL.exe 2000 5

GPU at 750:


GPU at stock (basically):
 
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Aquinus

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How does it do with less? Like 1600Mb instead of 2000Mb. Keep in mind that Windows and anything running in the background might have some stake in how much VRAM is currently being used. You use vram the moment you boot your machine, so saying that you want to test all of it isn't exactly feasible and could be your problem there.
 
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I just ran a test with your suggestion, it had half the amount of errors (like 3 million to 1.5 million) going lower to 1000mb got it to 900errors or none. So I'm going to conclude that I'm making a mountain out of a mole hill and im not running the program the way it was meant to or there is a bug... I was just paranoid from the first card being broken.
I've also been playing around with higher clock speeds and it is indeed much better than my 5850.
Thanks for the reply Aquinus.
 
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Hi

I ran memtestCL on my HD5970 using CPU and GPU switch and had zero errors on both

nb: I am under the impression that zero is good and errors are not so good

atb (all the best)

Law-II
 
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