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Message boards : Graphics cards (GPUs) : ASUS GTX 460 - Strange Difference In Measurements

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tomba
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Message 25186 - Posted: 21 May 2012 | 17:43:41 UTC

Some time ago I installed EVGA Precision to OC my ASUS GTX 460:



As you can see, Core is 850, Shader is 1700 and Memory is 2000. Great! Works a treat. No heat problems.

Today I installed GPU-Z:



Core is 850, Shader is 1700, but Memory is 1000!!

Which am I to believe??

Thanks, Tom


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Message 25190 - Posted: 21 May 2012 | 19:25:46 UTC - in response to Message 25186.

The answer is easy: both :)

When the first DDR memory was introduced, the memory chips continued to run at 100 MHz, 133 MHz etc., whereas externally data was sent at double that rate. Hence the term double data rate = DDR. Since advertising likes higher numbers, this was sold as "200 MHz DDR", "266 MHz DDR" etc.

In your case 1000 MHz should be the physical clock rate of the memory chips, corresponding to the 100 MHz in the example above. The 2000 MHz corresponds to the DDR data rate. However, your card should have GDDR5, where the external data rate is even higher, so this should actually be "4000 MHz". You'll see the latter in current advertisments.

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Message 25200 - Posted: 22 May 2012 | 6:15:32 UTC

I came across a problem of GPUGRID WU's generating compute errors if I had GPU-Z and Afterburner or EVGA Precision running together.

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Message 25201 - Posted: 22 May 2012 | 6:36:16 UTC - in response to Message 25190.

The answer is easy: both :)


Many thanks for clearing that up for me. Tom

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Message 25202 - Posted: 22 May 2012 | 6:40:07 UTC - in response to Message 25200.

I came across a problem of GPUGRID WU's generating compute errors if I had GPU-Z and Afterburner or EVGA Precision running together.


Ah!! I wonder if that's why I've had so many "Error while computing" failures recently...

Tom

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Message 25209 - Posted: 23 May 2012 | 10:40:51 UTC - in response to Message 25202.
Last modified: 23 May 2012 | 10:41:40 UTC

This GPU-Z issue was also experienced at another GPU project!

Normally you don't need GPU-Z to be running, it's just a reporting tool. MSI Afterburner and EVGA Precision are the programs that allow you to make adjustments to the fan speed and GPU clocks. Just use one of course.
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Message 25212 - Posted: 23 May 2012 | 19:48:56 UTC - in response to Message 25209.

And you don't even need to keep these open all the time.

Generally any 2 programs which monitor the GPU and hence poll the sensors frequently can cause trouble.

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Message 25218 - Posted: 24 May 2012 | 10:02:26 UTC - in response to Message 25209.

This GPU-Z issue was also experienced at another GPU project!

Normally you don't need GPU-Z to be running, it's just a reporting tool. MSI Afterburner and EVGA Precision are the programs that allow you to make adjustments to the fan speed and GPU clocks. Just use one of course.


Due to it's small interface I liked keeping GPU-Z open for monitoring temps/clocks.

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Message boards : Graphics cards (GPUs) : ASUS GTX 460 - Strange Difference In Measurements

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