GeForce GTX 860M vs Radeon R9 M275X

Intro

Compare those specs to the Radeon R9 M275X, which has a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
Radeon R9 M275X		50 Watts
	Difference: 5 Watts (11%)

Memory Bandwidth

Performance-wise, the Radeon R9 M275X should in theory be just a bit better than the GeForce GTX 860M overall. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The GeForce GTX 860M should be much (approximately 113%) more effective at AF than the Radeon R9 M275X. (explain)

GeForce GTX 860M		76512 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 40512 (113%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M275X is superior to the GeForce GTX 860M, but only just. (explain)

Radeon R9 M275X		14400 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 1648 (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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling 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 that the graphics chip could possibly record to the 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 the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.