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GeForce 8800 GTS (G80) 320MB vs Radeon R9 270X

Intro

The GeForce 8800 GTS (G80) 320MB comes with a GPU core speed of 513 MHz, and the 320 MB of GDDR3 memory runs at 792 MHz through a 320-bit bus. It also features 96 SPUs, 48 TAUs, and 20 Raster Operation Units.

Compare all that to the Radeon R9 270X, which uses a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM is set to run at a speed of 1400 MHz on this model. It features 1280 SPUs as well as 80 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB 143 Watts
Radeon R9 270X 180 Watts
Difference: 37 Watts (26%)

Memory Bandwidth

The Radeon R9 270X, in theory, should perform much faster than the GeForce 8800 GTS (G80) 320MB overall. (explain)

Radeon R9 270X 179200 MB/sec
GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Difference: 115840 (183%)

Texel Rate

The Radeon R9 270X will be quite a bit (approximately 225%) more effective at texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon R9 270X 80000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Difference: 55376 (225%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 270X is the winner, by a large margin. (explain)

Radeon R9 270X 32000 Mpixels/sec
GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
Difference: 21740 (212%)

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 8800 GTS (G80) 320MB

Amazon.com

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Radeon R9 270X

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 8800 GTS (G80) 320MB Radeon R9 270X
Manufacturer nVidia AMD
Year Feb 2007 October 2013
Code Name G80 Curacao XT
Memory 320 MB 2048 MB
Core Speed 513 MHz 1000 MHz
Memory Speed 1584 MHz 5600 MHz
Power (Max TDP) 143 watts 180 watts
Bandwidth 63360 MB/sec 179200 MB/sec
Texel Rate 24624 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 96 1280
Texture Mapping Units 48 80
Render Output Units 20 32
Bus Type GDDR3 GDDR5
Bus Width 320-bit 256-bit
Fab Process 90 nm 28 nm
Transistors 681 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

Radeon R9 270X

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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