In order to overclock the GTX 750 Ti, we used our favourite GeForce overclocking software, EVGA Precision X. The power limit slider cannot be moved beyond 100 percent (its default setting), likely because of the reliance on PCI-E power. However, we did increase the thermal limit from 80°C to its maximum of 95°C out of habit, though we doubt this is necessary with such a cool-running card.
Pleasingly, we hit the highest possible GPU core speed allowed on EVGA Precision X, which is 1,155MHz. This is a 135MHz overclock (~13 percent), which is pretty tasty. This also took the rated boost clock to 1,220MHz, but the card actually boosted to 1,285MHz. This wasn't a fluctuating clock speed either – it stayed rock solid at this frequency in all workloads.
We were also able to keep the memory stable up until 1.65GHz (6.6GHz effective), which is a massive 22 percent speed increase – not bad at all given that the memory chips are not cooled. At this frequency, the card's total memory bandwidth increases to 105.6GB/sec.
The even better news is that our overclocks were barely registered in terms of power consumption or temperature. During our Unigine stress test, system power consumption went from 174W to just 177W, while the delta T result creeped up by just 2°C. To our ears, fan noise was also no louder than it was at stock speeds.
Overclocking - BioShock Infinite
1,920 x 1,080, Ultra Detail with DOF
Nvidia GeForce GTX 760 2GB
AMD Radeon R9 270X 2GB
Nvidia GeForce GTX 750 Ti 2GB (OC)
AMD Radeon R9 270 2GB
Nvidia GeForce GTX 660 2GB
Nvidia GeForce GTX 750 Ti 2GB
Nvidia GeForce GTX 650 Ti BOOST 2GB
AMD Radeon R7 260X 2GB
Frames Per Second
Overclocking - Crysis 3
1,920 x 1,080, 0x AA, 16x AF, 'Very High' Settings