GeForce GTX 570 vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which features GPU clock speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
GeForce GTX 570		219 Watts
	Difference: 94 Watts (75%)

Memory Bandwidth

In theory, the Radeon R9 M295X is 16% faster than the GeForce GTX 570 overall, due to its higher data rate. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GTX 570		152000 MB/sec
	Difference: 24000 (16%)

Texel Rate

The Radeon R9 M295X is much (approximately 119%) more effective at texture filtering than the GeForce GTX 570. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GTX 570		43920 Mtexels/sec
	Difference: 52080 (119%)

Pixel Rate

The GeForce GTX 570 is a lot (approximately 22%) faster with regards to anti-aliasing than the Radeon R9 M295X, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 570		29280 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 5280 (22%)

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. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels 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 core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.