Radeon R5 M255 vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which makes use of a 28 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M295X should be a lot faster than the Radeon R5 M255 in general. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 160000 (1000%)

Texel Rate

The Radeon R9 M295X is a lot (about 411%) better at anisotropic filtering than the Radeon R5 M255. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 77200 (411%)

Pixel Rate

The Radeon R9 M295X will be quite a bit (more or less 219%) better at anti-aliasing than the Radeon R5 M255, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 16480 (219%)

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 information (in units of megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core 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 rate also depends 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 maximum fill rate.