GeForce GTX 970M vs Radeon R9 M275X

Intro

Compare that to the Radeon R9 M275X, which uses a 28 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM is set to run at a speed of 1125 MHz on this card. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTX 970M		75 Watts
	Difference: 25 Watts (50%)

Memory Bandwidth

In theory, the GeForce GTX 970M will be 33% quicker than the Radeon R9 M275X in general, because of its greater data rate. (explain)

GeForce GTX 970M		96000 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 24000 (33%)

Texel Rate

The GeForce GTX 970M is a lot (about 105%) faster with regards to texture filtering than the Radeon R9 M275X. (explain)

GeForce GTX 970M		73920 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 37920 (105%)

Pixel Rate

The GeForce GTX 970M should be a lot (about 208%) faster with regards to FSAA than the Radeon R9 M275X, and also should be capable of handling higher resolutions better. (explain)

GeForce GTX 970M		44352 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 29952 (208%)

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 (in units of megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. 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 of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.