GeForce GTX 275 vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which features a GPU core clock speed of 575 MHz, and 2048 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 275 should be a lot faster than the Radeon R9 M265X in general. (explain)

GeForce GTX 275		127008 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 55008 (76%)

Texel Rate

The GeForce GTX 275 will be a lot (more or less 120%) more effective at texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 27640 (120%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 275 is superior to the Radeon R9 M265X, and very much so. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 8524 (93%)

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 maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.