GeForce GTX 280 vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which features a core clock frequency of 575 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 280 should in theory be a lot faster than the Radeon R9 M265X overall. (explain)

GeForce GTX 280		141696 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 69696 (97%)

Texel Rate

The GeForce GTX 280 should be a lot (about 109%) better at anisotropic filtering than the Radeon R9 M265X. (explain)

GeForce GTX 280		48160 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 25160 (109%)

Pixel Rate

The GeForce GTX 280 is much (about 109%) more effective at anti-aliasing than the Radeon R9 M265X, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 280		19264 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 10064 (109%)

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 maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.