Radeon HD 4890 1GB vs Radeon R9 M370X

Intro

Compare those specs to the Radeon R9 M370X, which has core clock speeds of 800 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4890 1GB should perform a lot faster than the Radeon R9 M370X in general. (explain)

Radeon HD 4890 1GB		124800 MB/sec
Radeon R9 M370X		72000 MB/sec
	Difference: 52800 (73%)

Texel Rate

The Radeon HD 4890 1GB will be a lot (about 25%) more effective at AF than the Radeon R9 M370X. (explain)

Radeon HD 4890 1GB		40000 Mtexels/sec
Radeon R9 M370X		32000 Mtexels/sec
	Difference: 8000 (25%)

Pixel Rate

The Radeon HD 4890 1GB should be quite a bit (about 25%) better at full screen anti-aliasing than the Radeon R9 M370X, and also able to handle higher screen resolutions better. (explain)

Radeon HD 4890 1GB		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 (measured in megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.