XFX GF 7950 GT 570M 512MB Video Card Review :: XFX GF 7950 GT 570M 512MB Features

09-14-2006 · Category: Hardware - Video Cards

By Benjamin Sun
  • 24 Pixel Pipelines
  • 8 Vertex Shader Pipelines
  • 16 ROPs
  • 570MHz Core clock speed
  • 1.54GHz Memory clock speed
  • 512MB DDR3 memory
  • DirectX 9.0c
  • Pixel Shader 3.0
  • Vertex Shader 3.0
  • HDR
  • MSAA
  • 49.28GB/sec memory bandwidth
  • Up to 9.12 Gigapixel fill rate
  • 90 nanometer TSMC process
  • 278 million transistors
  • G71
  • PureVideo HD

The 7950GT is based upon NVIDIA's G71 chip, which is a modification of the G70 (7800 series) launched in 2005. The G70 was based upon TSMC's 110 nanometer process. NVIDIA die-shrunk the G70 chip to produce the 79xx series chips. The Pixel Pipelines, ROPs, Vertex Shaders and features are exactly the same, but the die-shrink allowed NVIDIA to produce a chip with less transistors (278 versus 302) and smaller than the previous generation.

It is hard to imagine that it has been over 4 years since the release of DirectX 9.0, and over 5 years since the release of Microsoft Windows XP OS. Virtually every video card released today (except for a few integrated chips and a few inexpensive ATI cards), support Pixel and Vertex Shader 3.0 standards. The key features of PS 3.0 and VS 3.0 include longer Shader programs, dynamic branching in the pixel Shader, and other features.

HDR stands for High Dynamic Range rendering. Natural light is composed of millions of colors and a wide variety of contrasts between the darkest dark and the lightest light. Before the advent of floating point graphics processors, the lighting in a game was integer based, meaning there was a dynamic range of 255:1 at maximum. With HDR you can use a wider range of lighting. Games like Oblivion use HDR throughout, in fact, some might say Oblivion uses HDR too much.

Here's three screenshots, one with HDR on, one with Bloom on, and one with HDR off. If you look closely at the sky turning HDR on gives a natural look for the colors. The second area is to look at the trees. The lighting on the trees is natural. With Bloom applied, the entire sky is over-bright, the trees are a much darker shade and the lighting is not as natural looking as with full on HDR. With HDR off, the sky is darker, the trees duller looking.


XFX GF 7950 GT 570M 512MB Video Card Review HDR on

HDR on

XFX GF 7950 GT 570M 512MB Video Card Review Bloom

Bloom

XFX GF 7950 GT 570M 512MB Video Card Review HDR off

HDR off


3DFX termed SLI (Scan Line Interleave) back in 1997 with the release of the Voodoo 2 cards. With the Pairing of two Voodoo 2 cards with an SLI bridge and you theoretically nearly doubled your gaming performance. 3DFX is long gone but NVIDIA introduced their version of SLI (Scalable Link Interface) in 2004 along with the nForce4 SLI platform and the 6800 series of video cards. You can SLI two 7950GT cards on any SLI motherboard with an SLI bridge.


XFX GF 7950 GT 570M 512MB Video Card Review SLI connector

SLI connector