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GeForce 8800 GTS (G92) vs Radeon HD 3870 512MB

Intro

The GeForce 8800 GTS (G92) features a GPU clock speed of 650 MHz, and the 512 MB of GDDR3 RAM is set to run at 970 MHz through a 256-bit bus. It also is comprised of 128 Stream Processors, 64 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 3870 512MB, which has GPU clock speed of 775 MHz, and 512 MB of GDDR3 RAM running at 900 MHz through a 256-bit bus. It also is made up of 320(64x5) Stream Processors, 16 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3870 512MB 106 Watts
GeForce 8800 GTS (G92) 135 Watts
Difference: 29 Watts (27%)

Memory Bandwidth

In theory, the GeForce 8800 GTS (G92) is 8% quicker than the Radeon HD 3870 512MB in general, because of its greater data rate. (explain)

GeForce 8800 GTS (G92) 62080 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 4480 (8%)

Texel Rate

The GeForce 8800 GTS (G92) should be quite a bit (approximately 235%) more effective at AF than the Radeon HD 3870 512MB. (explain)

GeForce 8800 GTS (G92) 41600 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 29200 (235%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 3870 512MB is a better choice, but only just. (explain)

Radeon HD 3870 512MB 12400 Mpixels/sec
GeForce 8800 GTS (G92) 10400 Mpixels/sec
Difference: 2000 (19%)

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 (G92)

Amazon.com

Check prices at:

Radeon HD 3870 512MB

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 GTS (G92) Radeon HD 3870 512MB
Manufacturer nVidia AMD
Year Dec 2007 Nov 19, 2007
Code Name G92 RV670 XT
Memory 512 MB 512 MB
Core Speed 650 MHz 775 MHz
Memory Speed 1940 MHz 1800 MHz
Power (Max TDP) 135 watts 106 watts
Bandwidth 62080 MB/sec 57600 MB/sec
Texel Rate 41600 Mtexels/sec 12400 Mtexels/sec
Pixel Rate 10400 Mpixels/sec 12400 Mpixels/sec
Unified Shaders 128 320(64x5)
Texture Mapping Units 64 16
Render Output Units 16 16
Bus Type GDDR3 GDDR3
Bus Width 256-bit 256-bit
Fab Process 65 nm 55 nm
Transistors 754 million (Unknown) million
Bus PCIe x16 2.0 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, 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 amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G92)

Amazon.com

Check prices at:

Radeon HD 3870 512MB

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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