Radeon R5 M255 vs Radeon R7 250X

Intro

Compare all that to the Radeon R7 250X, which has a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R7 250X should be quite a bit faster than the Radeon R5 M255 overall. (explain)

Radeon R7 250X		72000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 56000 (350%)

Texel Rate

The Radeon R7 250X is quite a bit (approximately 113%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

Radeon R7 250X		40000 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 21200 (113%)

Pixel Rate

The Radeon R7 250X should be much (approximately 113%) faster with regards to AA than the Radeon R5 M255, and also capable of handling higher screen resolutions better. (explain)

Radeon R7 250X		16000 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 8480 (113%)

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 largest amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.