Radeon HD 4670 512MB vs Radeon R9 M295X

Intro

Compare that to the Radeon R9 M295X, which has core speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

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 better than 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 should be a lot (more or less 300%) better 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

If using a high screen resolution is important to you, then the Radeon R9 M295X is superior to the Radeon HD 4670 512MB, by far. (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 largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once 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, High Dynamic Range and higher screen 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 clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.