Radeon HD 3690/3830 vs Radeon R9 M370X

Intro

Compare those specifications to the Radeon R9 M370X, which has clock speeds of 800 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M370X should be 172% faster than the Radeon HD 3690/3830 in general, due to its greater bandwidth. (explain)

Radeon R9 M370X		72000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 45504 (172%)

Texel Rate

The Radeon R9 M370X will be a lot (more or less 199%) more effective at texture filtering than the Radeon HD 3690/3830. (explain)

Radeon R9 M370X		32000 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 21312 (199%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M370X is the winner, but only just. (explain)

Radeon R9 M370X		12800 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 2112 (20%)

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 data (in units of MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.