Radeon HD 6770 1GB vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which comes with a clock frequency of 1015 MHz and a DDR3 memory frequency of 1100 MHz. It also features 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 HD 6770 1GB, in theory, should be a lot faster than the Radeon R9 M375 overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 32000 (91%)

Texel Rate

The Radeon R9 M375 will be a small bit (more or less 13%) more effective at AF than the Radeon HD 6770 1GB. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 4600 (13%)

Pixel Rate

The Radeon R9 M375 will be a small bit (about 13%) better at anti-aliasing than the Radeon HD 6770 1GB, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 1840 (13%)

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's calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, the result should 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, 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 amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.