GeForce GTX 965M vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which features a core clock speed of 900 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTX 965M		60 Watts
	Difference: 10 Watts (20%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M275X should theoretically be just a bit superior to the GeForce GTX 965M in general. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The GeForce GTX 965M will be quite a bit (more or less 68%) better at anisotropic filtering than the Radeon R9 M275X. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 24416 (68%)

Pixel Rate

The GeForce GTX 965M is quite a bit (more or less 110%) faster with regards to FSAA than the Radeon R9 M275X, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 15808 (110%)

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 data (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 can be processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.