GeForce 8800 GTS (G92) vs Radeon HD 4870 X2

Intro

Compare that to the Radeon HD 4870 X2, which has GPU clock speed of 750 MHz, and 1024 MB of GDDR5 RAM set to run at 900 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G92)		135 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 215 Watts (159%)

Memory Bandwidth

Theoretically, the Radeon HD 4870 X2 should be much faster than the GeForce 8800 GTS (G92) in general. (explain)

Radeon HD 4870 X2		230400 MB/sec
GeForce 8800 GTS (G92)		62080 MB/sec
	Difference: 168320 (271%)

Texel Rate

The Radeon HD 4870 X2 should be much (approximately 44%) better at texture filtering than the GeForce 8800 GTS (G92). (explain)

Radeon HD 4870 X2		60000 Mtexels/sec
GeForce 8800 GTS (G92)		41600 Mtexels/sec
	Difference: 18400 (44%)

Pixel Rate

The Radeon HD 4870 X2 is much (approximately 131%) faster with regards to anti-aliasing than the GeForce 8800 GTS (G92), and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 4870 X2		24000 Mpixels/sec
GeForce 8800 GTS (G92)		10400 Mpixels/sec
	Difference: 13600 (131%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 are applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.