Radeon HD 4670 512MB vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which comes with GPU clock speed of 750 MHz, and 4096 MB of GDDR5 memory running at 1375 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
Radeon R9 M295X		125 Watts
	Difference: 55 Watts (79%)

Memory Bandwidth

Performance-wise, the Radeon R9 M295X should in theory be much superior to the Radeon HD 4670 512MB overall. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 144000 (450%)

Texel Rate

The Radeon R9 M295X is much (more or less 300%) more effective at anisotropic filtering than the Radeon HD 4670 512MB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 72000 (300%)

Pixel Rate

The Radeon R9 M295X will be quite a bit (approximately 300%) more effective at FSAA than the Radeon HD 4670 512MB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 18000 (300%)

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 max amount of information (counted in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.