GeForce GTX 650 vs Radeon R9 M280X

Intro

Compare all that to the Radeon R9 M280X, which features GPU core speed of 900 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon R9 M280X		75 Watts
	Difference: 11 Watts (17%)

Memory Bandwidth

The Radeon R9 M280X should in theory be a little bit faster than the GeForce GTX 650 in general. (explain)

Radeon R9 M280X		88000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 8000 (10%)

Texel Rate

The Radeon R9 M280X should be a lot (more or less 49%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

Radeon R9 M280X		50400 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 16544 (49%)

Pixel Rate

The GeForce GTX 650 will be a bit (about 18%) more effective at anti-aliasing than the Radeon R9 M280X, and should be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 2528 (18%)

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 (counted in MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it must 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.