GeForce GTX 970 vs Radeon R5 M255

Intro

Compare all of that to the Radeon R5 M255, which makes use of a 28 nm design. AMD has set the core frequency at 940 MHz. The DDR3 memory works at a frequency of 1000 MHz on this card. It features 320 SPUs as well as 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 970 should theoretically be quite a bit better than the Radeon R5 M255 in general. (explain)

GeForce GTX 970		224000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 208000 (1300%)

Texel Rate

The GeForce GTX 970 should be much (approximately 481%) more effective at anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 970		109200 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 90400 (481%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 970 is superior to the Radeon R5 M255, and very much so. (explain)

GeForce GTX 970		67200 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 59680 (794%)

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 largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should 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 AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.