GeForce GTX 650 vs Radeon R9 M265X

Intro

Compare that to the Radeon R9 M265X, which has core clock speeds of 575 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 should be 11% faster than the Radeon R9 M265X overall, because of its higher data rate. (explain)

GeForce GTX 650		80000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 8000 (11%)

Texel Rate

The GeForce GTX 650 will be a lot (more or less 47%) better at texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 10856 (47%)

Pixel Rate

The GeForce GTX 650 should be quite a bit (approximately 84%) more effective at full screen anti-aliasing than the Radeon R9 M265X, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 7728 (84%)

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 largest amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. 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 output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.