GeForce GTX 970M vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which makes use of a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this particular model. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

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

Theoretically speaking, the GeForce GTX 970M is 33% faster than the Radeon R9 M275X overall, due to its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 970M will be quite a bit (approximately 105%) better at 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 is quite a bit (about 208%) better at AA than the Radeon R9 M275X, and also able to handle higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of data (in units of MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.