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GeForce 9800 GX2 vs Radeon HD 6750 1GB

Intro

The GeForce 9800 GX2 has core clock speeds of 600 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Compare that to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this specific model. It features 720 SPUs along with 36 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB 86 Watts
GeForce 9800 GX2 197 Watts
Difference: 111 Watts (129%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GX2 should theoretically be a lot better than the Radeon HD 6750 1GB in general. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 6750 1GB 64000 MB/sec
Difference: 64000 (100%)

Texel Rate

The GeForce 9800 GX2 is a lot (more or less 194%) more effective at texture filtering than the Radeon HD 6750 1GB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 6750 1GB 26100 Mtexels/sec
Difference: 50700 (194%)

Pixel Rate

The GeForce 9800 GX2 should be much (approximately 66%) faster with regards to FSAA than the Radeon HD 6750 1GB, and also capable of handling higher resolutions more effectively. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 6750 1GB 11600 Mpixels/sec
Difference: 7600 (66%)

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 6750 1GB

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 6750 1GB
Manufacturer nVidia AMD
Year Mar 2008 January 2011
Code Name G92 Juniper Pro
Memory 512 MB (x2) 1024 MB
Core Speed 600 MHz (x2) 725 MHz
Memory Speed 2000 MHz (x2) 4000 MHz
Power (Max TDP) 197 watts 86 watts
Bandwidth 128000 MB/sec 64000 MB/sec
Texel Rate 76800 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 128 (x2) 720
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 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 reach the max fill rate.

Display Prices

Hide Prices

GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 6750 1GB

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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