Radeon R5 M255 vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which has GPU core speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M295X should theoretically perform a lot faster than the Radeon R5 M255 overall. (explain)

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

Texel Rate

The Radeon R9 M295X should be a lot (about 411%) faster with regards to 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 much (more or less 219%) better at full screen anti-aliasing than the Radeon R5 M255, and also will be capable of handling higher screen resolutions better. (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 (measured in MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This 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 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 most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.