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ASUS GeForce GTX 750 Ti OC Video Card Circuit and Overclocking Guide

By: Steven Bassiri | Guides | Posted: Jan 10, 2015 3:21 am

Test Setup and Overclocking




The card isn't very long, and won't take up too much space in your case. There are no spacing issues to mention, and the fans were silent during operation. Even at full blast, the fans didn't produce much noise.




ASUS has a nice program called GPU Tweak, and they also have their own custom GPUz skin, as seen above. I use Afterburner to OC all the GPUs to keep things standard; however, in this case I would have been just as well off with the ASUS GPU Tweak Program, as it contained all pertinent settings. It has a very nice GUI as well, and you can unlock extra settings with the advanced mode.




I was able to increase my 3DMark11 score by almost 1000 points by unlocking and increasing the VCCD to maximum levels, which increased the GPU temperature by a very small amount. The cooler was more than ready to handle any extra heat from the GPU. I did hit a PerfCap, and GPUz reported it was due to VOp, and not temperatures.


Even though I unlocked voltage control, it didn't seem to make much difference, but I did force a constant voltage. It was enough to boost my clocks to 1430MHz on the core, which is a huge increase. If I went higher on the core than 1430MHz, the diver would crash. If I went higher than 1697MHz on the memory, I would get artifacts.




Here the card is at stock, and at another overclock in-between stock and my max overclock on this card. By just turning up the GPU core and GPU memory frequency knobs, you can greatly increase performance without increasing temperatures by much. It is quite simple to gain extra performance out of this card, but please note that I did set the fans to maximum speed when running the OC tests.




Here you can see the 3DMark11 scores at different GPU speeds.




This chart displays the other variables involved in the overclocks, including the maximum GPU core voltage (VDDC), idle and load total system power draw, and GPU core temperature. I did not overclock the rest of the platform for these tests since the platform wasn't bottlenecking the system. I measured maximum power draw during GPU test two.

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