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GeForce 8800 GT 512MB vs Radeon HD 7870 XT

Intro

The GeForce 8800 GT 512MB features a clock frequency of 600 MHz and a GDDR3 memory frequency of 900 MHz. It also features a 256-bit bus, and makes use of a 65 nm design. It features 112 SPUs, 56 Texture Address Units, and 16 ROPs.

Compare those specs to the Radeon HD 7870 XT, which features a core clock speed of 925 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB 105 Watts
Radeon HD 7870 XT 185 Watts
Difference: 80 Watts (76%)

Memory Bandwidth

The Radeon HD 7870 XT should theoretically perform much faster than the GeForce 8800 GT 512MB in general. (explain)

Radeon HD 7870 XT 192000 MB/sec
GeForce 8800 GT 512MB 57600 MB/sec
Difference: 134400 (233%)

Texel Rate

The Radeon HD 7870 XT will be a lot (approximately 164%) more effective at anisotropic filtering than the GeForce 8800 GT 512MB. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
GeForce 8800 GT 512MB 33600 Mtexels/sec
Difference: 55200 (164%)

Pixel Rate

The Radeon HD 7870 XT is a lot (about 208%) better at full screen anti-aliasing than the GeForce 8800 GT 512MB, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
GeForce 8800 GT 512MB 9600 Mpixels/sec
Difference: 20000 (208%)

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 GT 512MB

Amazon.com

Check prices at:

Radeon HD 7870 XT

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 8800 GT 512MB Radeon HD 7870 XT
Manufacturer nVidia AMD
Year Oct 2007 November 2012
Code Name G92 Tahiti LE
Memory 512 MB 2048 MB
Core Speed 600 MHz 925 MHz
Memory Speed 1800 MHz 6000 MHz
Power (Max TDP) 105 watts 185 watts
Bandwidth 57600 MB/sec 192000 MB/sec
Texel Rate 33600 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 112 1536
Texture Mapping Units 56 96
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 65 nm 28 nm
Transistors 754 million 4313 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 applied in one second. This is worked out by multiplying the total amount 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 processed in one second.

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

Display Prices

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GeForce 8800 GT 512MB

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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