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GeForce 9800 GTX vs Radeon HD 5670

Intro

The GeForce 9800 GTX features a core clock speed of 675 MHz and a GDDR3 memory frequency of 1100 MHz. It also uses a 256-bit bus, and makes use of a 65 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 ROPs.

Compare that to the Radeon HD 5670, which uses a 40 nm design. AMD has set the core frequency at 775 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this specific card. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
GeForce 9800 GTX 140 Watts
Difference: 79 Watts (130%)

Memory Bandwidth

In theory, the GeForce 9800 GTX should be 10% faster than the Radeon HD 5670 overall, because of its greater data rate. (explain)

GeForce 9800 GTX 70400 MB/sec
Radeon HD 5670 64000 MB/sec
Difference: 6400 (10%)

Texel Rate

The GeForce 9800 GTX will be a lot (more or less 179%) more effective at AF than the Radeon HD 5670. (explain)

GeForce 9800 GTX 43200 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 27700 (179%)

Pixel Rate

The GeForce 9800 GTX will be quite a bit (approximately 74%) better at full screen anti-aliasing than the Radeon HD 5670, and also able to handle higher resolutions without slowing down too much. (explain)

GeForce 9800 GTX 10800 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 4600 (74%)

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

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GeForce 9800 GTX

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 GTX Radeon HD 5670
Manufacturer nVidia AMD
Year April 2008 January 14, 2010
Code Name G92 Redwood XT
Memory 512 MB 1024 MB
Core Speed 675 MHz 775 MHz
Memory Speed 2200 MHz 4000 MHz
Power (Max TDP) 140 watts 61 watts
Bandwidth 70400 MB/sec 64000 MB/sec
Texel Rate 43200 Mtexels/sec 15500 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 6200 Mpixels/sec
Unified Shaders 128 400(80x5)
Texture Mapping Units 64 20
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 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 maximum amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 9800 GTX

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.

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