GeForce GTX 650 vs Radeon R5 M255

Intro

Compare that to the Radeon R5 M255, which comes with GPU clock speed of 940 MHz, and 2048 MB of DDR3 memory running at 1000 MHz through a 64-bit bus. It also is comprised of 320 Stream Processors, 20 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 650 should in theory be much faster than the Radeon R5 M255 overall. (explain)

GeForce GTX 650		80000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 64000 (400%)

Texel Rate

The GeForce GTX 650 should be much (more or less 80%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 15056 (80%)

Pixel Rate

The GeForce GTX 650 will be much (about 125%) better at full screen anti-aliasing than the Radeon R5 M255, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 9408 (125%)

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 maximum amount of data (counted in MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units of the card 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.