Point of View GeForce GTX 470 Review @ Fudzilla

Published: 16th May 2010, 10:38 GMT

Fudzilla

Today we’ll be talking about Point of View’s GTX 470, a card that by now certainly needs no introduction. Both the GTX 470 and GTX 480 are aimed at high end market and are the HD 5800 series’ direct competitors. NVIDIA launched the GTX 470 and 480 more than a month ago, and the cards are based on the largest and fastest Fermi GPU.

We expected the GTX 480 to get the full version of the GF100 GPU but NVIDIA thought differently and the GF100 ended up with one disabled Streaming Multiprocessor (SM). This means that out of 512 available stream processors (16 SM x 32 cores) or CUDA cores as NVIDIA likes to call them, the GTX 480 lacks 32 to reach the full number. Going downstream to the GTX 470, this card has two disabled SMs and 448 stream processors in total. Naturally, this raises questions of what happened to the full version of GF100, but at this point we can only speculate.

The GF100 is a complex chip that’s made of four Graphics Processing Clusters, four Raster Engines, six memory controllers, six ROP clusters and, as we’ve said before, 16 SMs. We’re not sure of exactly which SMs are disabled on the GTX, but we do know that the GTX 470 also comes without one ROP cluster containing 8 ROPs. At the same time, this means that the GTX 470’s memory bus is 320 bit, rather than 384-bit like on the GTX 480, which comes with all available ROP clusters. Each individual ROP cluster is assigned with one 64-bit memory controller.

In order to make the performance difference evident, the usual practice is to lower operating clocks. This is the case with the GTX 470 where the GPU runs at 607MHz, compared to the GTX 480’s 701MHz. Stream processors on the GTX 400 cards run at 1401MHz and 1215MHz for the GTX 480 and GTX 470, respectively.

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by WhyCry

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