GeForce GTX 870M vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which comes with a clock frequency of 575 MHz and a GDDR5 memory speed of 1125 MHz. It also features a 128-bit bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 870M should perform quite a bit faster than the Radeon R9 M265X in general. (explain)

GeForce GTX 870M		96000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 24000 (33%)

Texel Rate

The GeForce GTX 870M should be quite a bit (approximately 358%) faster with regards to texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX 870M		105392 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 82392 (358%)

Pixel Rate

The GeForce GTX 870M is a lot (about 145%) faster with regards to FSAA than the Radeon R9 M265X, and also able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 870M		22584 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 13384 (145%)

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 max amount of data (counted in MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, 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 figure is worked out by multiplying the total amount 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 per second.

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