Radeon HD 3690/3830 vs Radeon R9 M375X

Intro

Compare those specifications to the Radeon R9 M375X, which features a core clock speed of 1015 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M375X should be a lot faster than the Radeon HD 3690/3830 overall. (explain)

Radeon R9 M375X		72000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 45504 (172%)

Texel Rate

The Radeon R9 M375X will be much (about 280%) better at AF than the Radeon HD 3690/3830. (explain)

Radeon R9 M375X		40600 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 29912 (280%)

Pixel Rate

The Radeon R9 M375X is much (approximately 52%) faster with regards to full screen anti-aliasing than the Radeon HD 3690/3830, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M375X		16240 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 5552 (52%)

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 maximum amount of data (measured in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.