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GeForce 8800 GT 512MB vs Radeon HD 7870 XT

Intro

The GeForce 8800 GT 512MB uses a 65 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 RAM works at a frequency of 900 MHz on this model. It features 112 SPUs as well as 56 TAUs and 16 ROPs.

Compare all of that to the Radeon HD 7870 XT, which features core speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 96 Texture Address Units and 32 Rasterization Operator Units.

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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

As far as performance goes, the Radeon HD 7870 XT should in theory be much better 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 (more or less 164%) faster with regards to AF 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 will be quite a bit (more or less 208%) faster with regards to full screen anti-aliasing than the GeForce 8800 GT 512MB, and also able to handle higher resolutions without slowing down too much. (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 (counted in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

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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