Radeon R9 M265X vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which uses a 28 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM runs at a frequency of 1375 MHz on this specific card. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 M295X should theoretically be much better than the Radeon R9 M265X overall. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 104000 (144%)

Texel Rate

The Radeon R9 M295X is much (more or less 317%) more effective at anisotropic filtering than the Radeon R9 M265X. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 73000 (317%)

Pixel Rate

The Radeon R9 M295X will be a lot (about 161%) better at FSAA than the Radeon R9 M265X, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 14800 (161%)

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 max amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.