The card
Gigabyte decided to equip their new GeForce GTX 750 Ti Black Edition with
their very own cooling solution, the WindForce 2X 400W. This one features one
8mm copper heatpipe, which apparently is enough to keep the 750 Ti chip cool. Soldered to the heatpipes is
a dense
fin stack which is being cooled by two 80mm fans. The fans are manufactured by
Power Logic and carry the model number PLD08010S12H.
Overall the cooler is well manufactured and although the copper base is far from
a mirror finish, it does look better than quite a few other VGA coolers. Around the base you can find an aluminium part which is used
to fix the cooler to the PCB. This heatsink only provides cooling to the GPU and
not to the memory chips. A closer look at the thermal paste shows, that the
compound is soft and not too much has been used.
The Gigabyte GTX 750 Ti Black
Edition graphics card, or to be precise our sample of
it, allowed a maximum stable overclock of 1'398.5 MHz
for the GPU and 1'650 MHz on the memory side. We used Furemark V1.11.0 Geeks3D
benchmark with 15 minutes duration. With these clocks we had to feed the GPU
with 1.21 Volts and the memory ran at stock voltages.
A closer look at the PCB shows that Gigabyte equipped its card with an
2+1
phase power design. The GPU gets its current from two phases and the one
phase left is taking care of the memory.
Checking the voltage regulation chip we find a digital synchronous buck
converter uP1542S from uPI Semiconductor for the GPU.
Furthermore there is an uP1728p taking care of a stable current supply for the the memory.
The memory chips on the GTX 750 Ti Black Edition come from Samsung and carry the
model number K4G41325FC-HC03. They are specified to run at 1'500 MHz (6'000 MHz
effective).