Radeon HD 4790 vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which features a clock frequency of 1015 MHz and a DDR3 memory frequency of 1100 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4790 should in theory be a lot faster than the Radeon R9 M375 in general. (explain)

Radeon HD 4790		102400 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 67200 (191%)

Texel Rate

The Radeon R9 M375 will be a lot (approximately 111%) more effective at anisotropic filtering than the Radeon HD 4790. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 21400 (111%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M375 is superior to the Radeon HD 4790, and very much so. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 6640 (69%)

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 largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.