GeForce 8800 GT 512MB vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which has GPU core speed of 750 MHz, and 4096 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
Radeon R9 M295X		125 Watts
	Difference: 20 Watts (19%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M295X should theoretically be much superior to the GeForce 8800 GT 512MB in general. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 118400 (206%)

Texel Rate

The Radeon R9 M295X will be a lot (about 186%) better at anisotropic filtering than the GeForce 8800 GT 512MB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 62400 (186%)

Pixel Rate

The Radeon R9 M295X is quite a bit (approximately 150%) more effective at AA than the GeForce 8800 GT 512MB, and also capable of handling higher resolutions better. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 14400 (150%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past 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 RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.