GeForce GTX 960M vs Radeon R9 M275X

Intro

Compare that to the Radeon R9 M275X, which comes with clock speeds of 900 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

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTX 960M		65 Watts
	Difference: 15 Watts (30%)

Memory Bandwidth

In theory, the Radeon R9 M275X will be 13% faster than the GeForce GTX 960M in general, because of its greater bandwidth. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce GTX 960M		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The GeForce GTX 960M is quite a bit (more or less 22%) better at AF than the Radeon R9 M275X. (explain)

GeForce GTX 960M		43840 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 7840 (22%)

Pixel Rate

The GeForce GTX 960M is quite a bit (about 22%) more effective at anti-aliasing than the Radeon R9 M275X, and able to handle higher resolutions while still performing well. (explain)

GeForce GTX 960M		17536 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 3136 (22%)

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 (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's 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 fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.