Gigabyte GTX 460 1GB OC review
Author: Luka Rakamaric
Date: 04 Oct 2010
A while ago we reviewed NVIDIA’s reference GTX 460 cards, the 1 GB and 768 MB models. Unlike many previous cards with different frame buffer sizes, here the difference is bigger than just an additional 256 MB. The performance of the 1 GB version is higher because it also sports a wider memory bus. Gigabyte sent us one such card, which should be even faster with its raised clocks, as well as quieter and cooler thanks to the custom heatpipe cooler.
The GTX 460 is powered by the GF104 GPU, which represents the second version of the Fermi architecture NVIDIA brought to the market, the first being the GF100 that powered the GTX 480, 470 and the not so good 465 cards. The GF104 brought some changes, first of all an increased number of texture units. The number is actually lower, but the relative texture filter to texture address unit ratio has doubled. This has corrected one of the remarks we had for the GF100.
Like with the GF100, NVIDIA didn’t roll out the full GPU card. One of the 8 streaming multiprocessors is disabled. However, each of them now consists of 48 stream processors and 8 special function units (32:4 in the GF100). So if we multiply 48 with 7, we get the 336 SPs each GTX 460 is equipped with. With only four less texture filter units than in GF100, it’s a much more balanced GPU.
The stock clock is 675 MHz, which is higher than the GTX 465 and 470 and only marginally less than the GTX 480.
However, since this is an OC card, Gigabyte has pushed its clocks to 715 MHz for the core, 1430 MHz for the shaders and the memory clock stayed the same at 3600 MHz effective (GDDR5).