GeForce GTX 650 vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which comes with a clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon R9 M395X		125 Watts
	Difference: 61 Watts (95%)

Memory Bandwidth

Performance-wise, the Radeon R9 M395X should theoretically be a lot superior to the GeForce GTX 650 in general. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 80000 (100%)

Texel Rate

The Radeon R9 M395X is much (about 173%) faster with regards to AF than the GeForce GTX 650. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 58688 (173%)

Pixel Rate

The Radeon R9 M395X should be quite a bit (more or less 37%) faster with regards to full screen anti-aliasing than the GeForce GTX 650, and also should be able to handle higher screen resolutions better. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 6208 (37%)

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 megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.