GeForce GTX 750 vs Radeon R9 M280X

Intro

Compare all of that to the Radeon R9 M280X, which comes with 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 750		55 Watts
Radeon R9 M280X		75 Watts
	Difference: 20 Watts (36%)

Memory Bandwidth

In theory, the Radeon R9 M280X will be 10% faster than the GeForce GTX 750 in general, due to its higher data rate. (explain)

Radeon R9 M280X		88000 MB/sec
GeForce GTX 750		80000 MB/sec
	Difference: 8000 (10%)

Texel Rate

The Radeon R9 M280X is quite a bit (more or less 54%) more effective at texture filtering than the GeForce GTX 750. (explain)

Radeon R9 M280X		50400 Mtexels/sec
GeForce GTX 750		32640 Mtexels/sec
	Difference: 17760 (54%)

Pixel Rate

The GeForce GTX 750 should be a bit (about 13%) more effective at AA than the Radeon R9 M280X, and also will be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 1920 (13%)

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 max amount of data (in units of MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one 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 - aka 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 reach the maximum fill rate.