GeForce GTX 650 vs Radeon R9 M385X

Intro

Compare those specs to the Radeon R9 M385X, which has clock speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 M385X should theoretically be a bit better than the GeForce GTX 650 in general. (explain)

Radeon R9 M385X		96000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 16000 (20%)

Texel Rate

The Radeon R9 M385X should be much (about 82%) more effective at AF than the GeForce GTX 650. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 27744 (82%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M385X is a better choice, but only just. (explain)

Radeon R9 M385X		17600 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 672 (4%)

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 information (in units of MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.