GeForce GTX 295 vs Radeon R9 M265X

Intro

Compare those specifications to the Radeon R9 M265X, which comes with core speeds of 575 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 295 is 211% faster than the Radeon R9 M265X in general, because of its higher data rate. (explain)

GeForce GTX 295		223776 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 151776 (211%)

Texel Rate

The GeForce GTX 295 should be a lot (about 301%) more effective at texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX 295		92160 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 69160 (301%)

Pixel Rate

The GeForce GTX 295 is much (about 251%) more effective at full screen anti-aliasing than the Radeon R9 M265X, and should be able to handle higher resolutions better. (explain)

GeForce GTX 295		32256 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 23056 (251%)

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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.