Radeon HD 4890 2GB vs Radeon R9 M370X

Intro

Compare those specifications to the Radeon R9 M370X, which comes with GPU core speed of 800 MHz, and 2048 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4890 2GB, in theory, should be much faster than the Radeon R9 M370X in general. (explain)

Radeon HD 4890 2GB		124800 MB/sec
Radeon R9 M370X		72000 MB/sec
	Difference: 52800 (73%)

Texel Rate

The Radeon HD 4890 2GB should be quite a bit (more or less 25%) better at AF than the Radeon R9 M370X. (explain)

Radeon HD 4890 2GB		40000 Mtexels/sec
Radeon R9 M370X		32000 Mtexels/sec
	Difference: 8000 (25%)

Pixel Rate

The Radeon HD 4890 2GB is much (about 25%) better at full screen anti-aliasing than the Radeon R9 M370X, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4890 2GB		16000 Mpixels/sec
Radeon R9 M370X		12800 Mpixels/sec
	Difference: 3200 (25%)

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 moved over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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