ASUS GeForce GTX 970 STRIX OC Edition Review
Published by Marc Büchel on 19.09.14Page:
The card
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ASUS decided to equip the GeForce GTX 970 STRIX with a new version of their famous DirectCU II cooler. In case of this card there are three heatpipes, two eight millimeter and one with ten millimeter diameter. Soldered to the heatpipes you find the fin stack which is being provided with fresh air via two fans. The fans on the new STRIX series are designed to spin only when GPU temprature reaches 65 degrees, which means that in 2D mode they are completeley off. Also, under low loads the fans don't start to spin. Under high-load the noise level is still silent, subjectively speaking.
Overclocking
Overclocking this card we actually had quite some fun, since you can push this little beast quite high. The highest stable clocks we reached were 1'450 MHz on the GPU and 2'000 MHz on the memory (effective 8'000 MHz). The screenshot below shows you what kind you of score you can get running 3DMark Fire Strike Extreme at these clocks. In order to make the GPU run stably, we had to apply 1.25 volt.
A closer look at the PCB shows that ASUS equipped this card with a six phase digital power design. The GPU gets its current from five phases and the one phase left, takes care of the 4GB GDDR5 memory. Once more, ASUS is using high quality super alloy chokes. On the backside of the GPU you can find dedicated SAP CAPs to maximize overclocking headroom.
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The memory chips on the GTX 970 STRIX come from Samsung and carry the model number K4G41325FC-HC28. They are specified to run at 1'750 MHz (7'000 MHz effective).
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