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GeForce 9800 GX2 vs Radeon HD 5750 512MB

Intro

The GeForce 9800 GX2 features a GPU core clock 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 Raster Operation Units.

Compare those specifications to the Radeon HD 5750 512MB, which comes with a core clock frequency of 700 MHz and a GDDR5 memory frequency of 1150 MHz. It also features a 128-bit bus, and uses a 40 nm design. It is made up of 720(144x5) SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB 86 Watts
GeForce 9800 GX2 197 Watts
Difference: 111 Watts (129%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GX2 should in theory be much superior to the Radeon HD 5750 512MB in general. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 5750 512MB 73600 MB/sec
Difference: 54400 (74%)

Texel Rate

The GeForce 9800 GX2 should be a lot (more or less 205%) better at texture filtering than the Radeon HD 5750 512MB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 5750 512MB 25200 Mtexels/sec
Difference: 51600 (205%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 9800 GX2 is a better choice, by a large margin. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 5750 512MB 11200 Mpixels/sec
Difference: 8000 (71%)

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 5750 512MB

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 5750 512MB
Manufacturer nVidia AMD
Year Mar 2008 October 13, 2009
Code Name G92 Juniper LE
Memory 512 MB (x2) 512 MB
Core Speed 600 MHz (x2) 700 MHz
Memory Speed 2000 MHz (x2) 4600 MHz
Power (Max TDP) 197 watts 86 watts
Bandwidth 128000 MB/sec 73600 MB/sec
Texel Rate 76800 Mtexels/sec 25200 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 11200 Mpixels/sec
Unified Shaders 128 (x2) 720(144x5)
Texture Mapping Units 64 (x2) 36
Render Output Units 16 (x2) 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 1040 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 5750 512MB

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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