GeForce GTX 850M vs Radeon R9 M265X

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M265X should theoretically be quite a bit superior to the GeForce GTX 850M overall. (explain)

Radeon R9 M265X		72000 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 40000 (125%)

Texel Rate

The GeForce GTX 850M will be quite a bit (more or less 52%) faster with regards to AF than the Radeon R9 M265X. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 12040 (52%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 850M is superior to the Radeon R9 M265X, by a large margin. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 4816 (52%)

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 largest amount of information (in units of megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the 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 clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.