Radeon HD 4670 512MB vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which has a clock frequency of 1015 MHz and a DDR3 memory speed of 1100 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M375 should in theory perform a bit faster than the Radeon HD 4670 512MB in general. (explain)

Radeon R9 M375		35200 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 3200 (10%)

Texel Rate

The Radeon R9 M375 will be much (approximately 69%) better at anisotropic filtering than the Radeon HD 4670 512MB. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 16600 (69%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M375 is the winner, by a large margin. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 10240 (171%)

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 largest amount of information (counted in MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total texture units of the card 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.