XFX GeForce 9800GTX Video Card Review :: XFX 9800GTX 512MB Features

04-02-2008 · Category: Hardware - Video Cards

By Doc Overclock
  • 3-way SLI
  • Amazing scaling with 3-way
  • 128 SPs@1.69GHz
  • 1.1GHz memory
  • 256-bit memory
  • PCI Express 2.0
  • 675 CORE
  • 1698 SHADER
  • 1100MHz memory
  • Dual 6-pin power
  • 512MB GDDR3
  • 10.5 Dual slot
  • 156W
  • Two DVI-DL HDTV HDMI
  • HybridPower
  • Purevideo HD
  • DirectX 10
  • Pixel Shader 4.0
  • Vertex Shader 4.0

Brand NameXFX
EVGA Part NumberPV-T98F-YDF9
Graphics ChipG92
Core clock675MHz
Shader Clock1688MHz
SPs128
Fabrication Process65 nm
Transistors754 Million
Memory clock1100 MHz/ 2200 MHz
Memory Interface256-bit
Memory bandwidth70.4 GB/second
Memory Size512MB
ROPs16
Texture Filtering Units64
Texture Filtering Rate 43.2 Gigatexels/second
HDCP SupportYes
HDMI SupportYes (using DVI-to HDMI adapter)
Connectors2x Dual-Link DVI-I, 1 7-pin HDTV Out
RAMDACs400MHz
Bus PCI Express 2.0
Form FactorDual Slot
Power Connectors 2 x6-pin
Max Board Power 156 Watts
GPU Thermal Threshold105 C

NVIDIA cards support DirectX 10.0 Shader Model 4.0. While the competition in the form of AMD and S3 have moved to SM 4.1 which adds some support for Global Illumination and better anti-aliasing, the vast majority of cards and games on the market today are SM 4.0. In any event, 4.1 is a minor update which shouldn't affect anyone in the lifetime of the card as developers are still using DX10 as the base, due to the installed base and feature set.


XFX GeForce 9800GTX Video Card Review Two SLI Bridges

Two SLI Bridges


NVIDIA first introduced SLI to their motherboards and video cards with the 6800 Ultra launch in 2004. The concept of two video cards working together to improve gaming performance has a long history including the 3DFX Voodoo 2 SLI, the Rage Fury Maxx and the newly released 9800GX2. The 9800GTX has the ability to do Tri-SLI which allows the user to use up to 3 video cards at the same time.

XFX has clocked their Stream Processors at the default clock of 1688MHz. NVIDIA has separated the Core Clock from their Shader Clock frequencies which meant that every NVIDIA card since the 8800GTX was launched and this card is no exception. Higher frequencies mean higher performance across the board as higher amounts of triangles and pixels are drawn.

The Core clock frequency on the 9800GTX from XFX is 675MHz which is a small increase from the Core Clock of the 8800GTS 512MB of 650MHz. In fact, if you look at the various NVIDIA video cards in their lineup, their 9800GTX is only a small step faster in frequency across the board except in the area of memory where the 2.2GHz frequency is a 200MHz increase over the other cards default clock rates.

Here's a chart representing the information on NVIDIA's single GPU cards on the market today. Note that the 9800GTX has the same specifications as the 8800GTS 512MB with minor clock speed differences, in fact the 9800GTX has the same specifications in terms of features etc as the 9800GX2, 8800GT 512MB (with the exception of 128 SPs instead of the 112 on the 8800GT 512MB) and some compression technology which NVIDIA has not given detailed information on for G9x series and above.


Card9800GTX8800GTX8800GTS 512MB9600GT8800GT 512MB
Stream Processors12812812864112
Core Clock675575650650600
Shader Clock1.689GHz1.5GHz1.6251.6251.5
Memory Clock2.2GHz1.8GHz2GHz1.8GHz1.8
Memory amount512MB768MB512MB512MB512MB
Memory Interface256-bit384-bit256-bit256-bit256-bit
Memory bandwidth70.486.46457.657.6
Texture Fillrate36.841.620.833.6
Cost $299-349$354.99$249$205244

The G92 (8800GT 512MB) introduced new features to NVIDIA's PureVideo CODEC. The new features include the ability to run two HD sources at the same time (playing the movie on one screen, and the director's commentary on the other screen for example), improved color and saturation correction. The 9800GTX also has this engine, allowing the next generation of High Definition content to be viewed with this card including Blu-Ray and HD-DVD.