NVIDIA GeForce GeForce GTX 980 Maxwell Video Card Review

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NVIDIA GeForce GTX 970 Overclocking

We also used the EVGA PrecisionX 16 overclocking utility to overclock the ZOTAC GeForce GTX 970 AMP! Omega Edition.

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This card features a base clock of 1102MHz, a 1241MHz boost clock and theGDDR5 memory is clocked at 7046MHz. This card is already factory overclocked, so it will be interesting to see what we can get up to.

zotac-precision

The ZOTAC GeForce GTX 970 AMP! Omega Edition was only able to go up to a power target of 106%, but that is better than nothing. We were able to raise the power target to 106% and bumped up the GPU clock offset to +230MHz and the memory clock offset to +675MHz before we started to get encounter some stability issues.

zotac-oc

This overclock meant that we were running at 1533.8 MHz at times thanks to NVIDIA Boost 2.0 on the core and 2097.9MHz (8391.6MHz effective) on the 4GB of GDDR5 memory. This is a pretty impressive overclock and were happy to see that the temperatures were still in the 60-70C range when gaming and running benchmarks with the fans left on auto.

ZOTAC GeForce GTX 970 AMP! Omega Edition Stock:

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ZOTAC GeForce GTX 970 AMP! Omega Edition Overclocked:

zotac-970-3dmark-oc

By overclocking the ZOTAC GeForce GTX 970 AMP! Omega Edition we were able to take the score of 10,048 in 3DMark Fire Strike and improve it to 11,544. This is a 1,496 point increase in our overall 3DMark score, which represents a performance gain of 14.8 percent.

 

Let’s take a look at what the EVGA GeForce GTX 970 ACX 1.0 card can do.

evga-970-oc

The EVGA GeForce GTX 970 ACX 1.0 was unlocked to go up to a power target of 110% and we were also able to get the the GPU clock offset to +240MHz and the memory clock offset to +450MHz before we started seeing artifacts.

evga-970-oc-gpuz

This overclock put us at up to 1505MHz on the core clock with the memory at 1976.8MHz (7907.2MHz effective). The temperatures on the card were again stellar and we were under 70C with the card overclocked to 1505MHz on the CUDA cores.

EVGA GeForce GTX 970 ACX 1.0 Stock:

3dmark-evga

EVGA GeForce GTX 970 ACX 1.0 Overclocked:

970-oc-3dmark

Our score went from 9,826 to 11,217 in 3DMark Fire Strike, which is a  1,391 point increase in our overall 3DMark score, which represents a performance gain of 14.2 percent. Not too shabby and it looks like running 1500MHz and above on the CUDA cores applies to both GeForce GTX 970 and GeForce GTX 980 cards!

 

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