Radeon HD 5670 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which comes with a clock frequency of 750 MHz and a GDDR5 memory speed of 1375 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon R9 M295X		125 Watts
	Difference: 64 Watts (105%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M295X should be 175% quicker than the Radeon HD 5670 in general, because of its greater data rate. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 112000 (175%)

Texel Rate

The Radeon R9 M295X will be quite a bit (approximately 519%) faster with regards to AF than the Radeon HD 5670. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 80500 (519%)

Pixel Rate

The Radeon R9 M295X is a lot (approximately 287%) more effective at anti-aliasing than the Radeon HD 5670, and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 17800 (287%)

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 (measured in MB per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 get to the maximum fill rate.