Radeon HD 6750 vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which features a core clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon R9 M295X		125 Watts
	Difference: 39 Watts (45%)

Memory Bandwidth

Performance-wise, the Radeon R9 M295X should in theory be much better than the Radeon HD 6750 in general. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 112000 (175%)

Texel Rate

The Radeon R9 M295X will be a lot (approximately 268%) better at texture filtering than the Radeon HD 6750. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 69900 (268%)

Pixel Rate

The Radeon R9 M295X is a lot (more or less 107%) more effective at FSAA than the Radeon HD 6750, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 12400 (107%)

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 maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.