GeForce GTX 650 vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which features GPU clock speed of 725 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 650 should perform a bit faster than the Radeon R9 M270X overall. (explain)

GeForce GTX 650		80000 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 8000 (11%)

Texel Rate

The GeForce GTX 650 is a bit (approximately 17%) better at texture filtering than the Radeon R9 M270X. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 4856 (17%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 650 is the winner, by far. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 5328 (46%)

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 maximum amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once 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 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 amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at 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 could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 ability to reach the max fill rate.