GeForce 8800 GT 512MB vs Radeon R9 295X2

Intro

Compare all of that to the Radeon R9 295X2, which comes with core speeds of 1018 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2816 SPUs as well as 176 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
Radeon R9 295X2		500 Watts
	Difference: 395 Watts (376%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 295X2 will be 1011% quicker than the GeForce 8800 GT 512MB in general, because of its higher bandwidth. (explain)

Radeon R9 295X2		640000 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 582400 (1011%)

Texel Rate

The Radeon R9 295X2 is quite a bit (approximately 966%) better at anisotropic filtering than the GeForce 8800 GT 512MB. (explain)

Radeon R9 295X2		358336 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 324736 (966%)

Pixel Rate

The Radeon R9 295X2 should be quite a bit (about 1257%) faster with regards to FSAA than the GeForce 8800 GT 512MB, and will be capable of handling higher resolutions more effectively. (explain)

Radeon R9 295X2		130304 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 120704 (1257%)

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: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs 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 output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.