GeForce GTX 750 Ti vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which features GPU clock speed of 900 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTX 750 Ti		60 Watts
	Difference: 10 Watts (20%)

Memory Bandwidth

In theory, the GeForce GTX 750 Ti is 20% quicker than the Radeon R9 M275X overall, because of its greater data rate. (explain)

GeForce GTX 750 Ti		86400 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 14400 (20%)

Texel Rate

The GeForce GTX 750 Ti should be a small bit (more or less 13%) better at anisotropic filtering than the Radeon R9 M275X. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 4800 (13%)

Pixel Rate

The GeForce GTX 750 Ti is a little bit (more or less 13%) more effective at AA than the Radeon R9 M275X, and should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon R9 M275X		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: Bandwidth is the largest amount of data (measured in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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