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GeForce 9800 GX2 vs Radeon HD 5670

Intro

The GeForce 9800 GX2 features a core clock frequency of 600 MHz and a GDDR3 memory frequency of 1000 MHz. It also makes use of a 256-bit memory bus, and makes use of a 65 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 ROPs.

Compare all that to the Radeon HD 5670, which features a core clock frequency of 775 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It is comprised of 400(80x5) SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
GeForce 9800 GX2 197 Watts
Difference: 136 Watts (223%)

Memory Bandwidth

The GeForce 9800 GX2, in theory, should perform a lot faster than the Radeon HD 5670 in general. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 5670 64000 MB/sec
Difference: 64000 (100%)

Texel Rate

The GeForce 9800 GX2 should be much (more or less 395%) better at texture filtering than the Radeon HD 5670. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 61300 (395%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 9800 GX2 is the winner, by a large margin. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 13000 (210%)

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

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Radeon HD 5670

Amazon.com

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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 5670
Manufacturer nVidia AMD
Year Mar 2008 January 14, 2010
Code Name G92 Redwood XT
Memory 512 MB (x2) 1024 MB
Core Speed 600 MHz (x2) 775 MHz
Memory Speed 2000 MHz (x2) 4000 MHz
Power (Max TDP) 197 watts 61 watts
Bandwidth 128000 MB/sec 64000 MB/sec
Texel Rate 76800 Mtexels/sec 15500 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 6200 Mpixels/sec
Unified Shaders 128 (x2) 400(80x5)
Texture Mapping Units 64 (x2) 20
Render Output Units 16 (x2) 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 627 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 (in units of MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends 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

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GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 5670

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.

Comments

2 Responses to “GeForce 9800 GX2 vs Radeon HD 5670”
any says:

2X performance WOW!!!

admin says:

That's just theoretical performance, actual in-game performance will vary.

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