Noise, Overclocking and 2D Image Quality
Since the fan of the GeForce 7800 GT cannot regulate its speed automatically, like the GeForce 7800 GTX, the noise level should have a couple of pre-sets: for 2D and 3D, provided that the ForceWare driver supports the GeForce 7800 GT. In fact, even in 3D the fan never works on its maximum speed, which ensures relatively quiet operation. In 2D the GeForce 7800 GT is even less noisy than the RADEON X800 XL.
The GeForce 7800 GT reference graphics card we had in our lab proved quite overclockable. We managed to increase its working frequencies from 400MHz for the chip and 1000MHz for the memory to 470MHz for the chip and 1200MHz for the memory, which should ensure a significant performance increase during our tests.
We were not impressed by 2D quality of the reference NVIDIA GeForce 7800 GT board much. While clearness was excellent in all resolutions, we noticed visible shadows and trails from letters and pointers. The poor 2D quality was observed on both DVI-I outputs of the graphics card on our Dell P1110 (21”) display. We are not sure whether the problem was only with our graphics card or is a result of print-circuit board (PCB) simplification and improper BIOS tuning, but we’ll keep our eye on the issue.