Radeon HD 4670 512MB vs Radeon R9 M375

Intro

Compare all that to the Radeon R9 M375, which makes use of a 28 nm design. AMD has set the core speed at 1015 MHz. The DDR3 memory is set to run at a speed of 1100 MHz on this particular model. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M375 should be a small bit faster than the Radeon HD 4670 512MB overall. (explain)

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

Texel Rate

The Radeon R9 M375 is a lot (more or less 69%) faster with regards to texture 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

The Radeon R9 M375 should be much (more or less 171%) more effective at anti-aliasing than the Radeon HD 4670 512MB, and will be capable of handling higher resolutions without losing too much performance. (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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the 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 the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.