GeForce GTX 260 vs Radeon R9 M275X

Intro

Compare all that to the Radeon R9 M275X, which comes with clock speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTX 260		182 Watts
	Difference: 132 Watts (264%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 260 is 55% quicker than the Radeon R9 M275X in general, due to its greater data rate. (explain)

GeForce GTX 260		111888 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 39888 (55%)

Texel Rate

The GeForce GTX 260 will be a small bit (more or less 2%) more effective at AF than the Radeon R9 M275X. (explain)

GeForce GTX 260		36864 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 864 (2%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 260 is the winner, but it probably won't make a huge difference. (explain)

GeForce GTX 260		16128 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 1728 (12%)

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: Bandwidth is the largest amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.