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GeForce 9800 GT 1GB vs Radeon HD 6570 (OEM) 2GB

Intro

The GeForce 9800 GT 1GB comes with a clock speed of 600 MHz and a GDDR3 memory speed of 900 MHz. It also makes use of a 256-bit memory bus, and uses a 65/55 nm design. It is made up of 112 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Compare all that to the Radeon HD 6570 (OEM) 2GB, which uses a 40 nm design. AMD has clocked the core frequency at 650 MHz. The GDDR5 memory works at a speed of 1000 MHz on this particular card. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB 50 Watts
GeForce 9800 GT 1GB 105 Watts
Difference: 55 Watts (110%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6570 (OEM) 2GB is 11% faster than the GeForce 9800 GT 1GB overall, because of its higher data rate. (explain)

Radeon HD 6570 (OEM) 2GB 64000 MB/sec
GeForce 9800 GT 1GB 57600 MB/sec
Difference: 6400 (11%)

Texel Rate

The GeForce 9800 GT 1GB should be a lot (more or less 115%) more effective at AF than the Radeon HD 6570 (OEM) 2GB. (explain)

GeForce 9800 GT 1GB 33600 Mtexels/sec
Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
Difference: 18000 (115%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 9800 GT 1GB is the winner, and very much so. (explain)

GeForce 9800 GT 1GB 9600 Mpixels/sec
Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
Difference: 4400 (85%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

GeForce 9800 GT 1GB

Amazon.com

Radeon HD 6570 (OEM) 2GB

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Model GeForce 9800 GT 1GB Radeon HD 6570 (OEM) 2GB
Manufacturer nVidia AMD
Year July 2008 February 2011
Code Name G92a/b Turks
Fab Process 65/55 nm 40 nm
Bus PCIe x16 2.0 PCIe 2.1 x16
Memory 1024 MB 1024 MB
Core Speed 600 MHz 650 MHz
Shader Speed 1500 MHz (N/A) MHz
Memory Speed 900 MHz (1800 MHz effective) 1000 MHz (4000 MHz effective)
Unified Shaders 112 480
Texture Mapping Units 56 24
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1
Power (Max TDP) 105 watts 50 watts
Shader Model 4.0 5.0
Bandwidth 57600 MB/sec 64000 MB/sec
Texel Rate 33600 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 5200 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

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