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GeForce 9800 GX2 vs Radeon HD 4730

Intro

The GeForce 9800 GX2 has a GPU core speed of 600 MHz, and the 512 MB of GDDR3 memory runs at 1000 MHz through a 256-bit bus. It also is comprised of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

Compare those specs to the Radeon HD 4730, which has clock speeds of 700 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4730 140 Watts
GeForce 9800 GX2 197 Watts
Difference: 57 Watts (41%)

Memory Bandwidth

In theory, the GeForce 9800 GX2 should be 122% quicker than the Radeon HD 4730 overall, because of its higher bandwidth. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 4730 57600 MB/sec
Difference: 70400 (122%)

Texel Rate

The GeForce 9800 GX2 should be much (about 243%) better at texture filtering than the Radeon HD 4730. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 4730 22400 Mtexels/sec
Difference: 54400 (243%)

Pixel Rate

The GeForce 9800 GX2 should be quite a bit (more or less 243%) more effective at full screen anti-aliasing than the Radeon HD 4730, and able to handle higher resolutions more effectively. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 4730 5600 Mpixels/sec
Difference: 13600 (243%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 4730

Amazon.com

Check prices at:

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

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Model GeForce 9800 GX2 Radeon HD 4730
Manufacturer nVidia AMD
Year Mar 2008 Jun 8, 2009
Code Name G92 RV770/CE
Memory 512 MB (x2) 512 MB
Core Speed 600 MHz (x2) 700 MHz
Memory Speed 2000 MHz (x2) 3600 MHz
Power (Max TDP) 197 watts 140 watts
Bandwidth 128000 MB/sec 57600 MB/sec
Texel Rate 76800 Mtexels/sec 22400 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 5600 Mpixels/sec
Unified Shaders 128 (x2) 640(128x5)
Texture Mapping Units 64 (x2) 32
Render Output Units 16 (x2) 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 55 nm
Transistors 754 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units 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 rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 4730

Amazon.com

Check prices at:

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.

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