Radeon HD 4790 vs Radeon R9 M370X

Intro

Compare that to the Radeon R9 M370X, which features GPU clock speed of 800 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 4790 should theoretically be a lot better than the Radeon R9 M370X overall. (explain)

Radeon HD 4790		102400 MB/sec
Radeon R9 M370X		72000 MB/sec
	Difference: 30400 (42%)

Texel Rate

The Radeon R9 M370X will be a lot (approximately 67%) more effective at AF than the Radeon HD 4790. (explain)

Radeon R9 M370X		32000 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 12800 (67%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M370X is the winner, and very much so. (explain)

Radeon R9 M370X		12800 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 3200 (33%)

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 (counted in MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.