Radeon R7 370 4G vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which has a core clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 370 4G		110 Watts
Radeon R9 M390X		125 Watts
	Difference: 15 Watts (14%)

Memory Bandwidth

Performance-wise, the Radeon R7 370 4G should theoretically be a bit superior to the Radeon R9 M390X overall. (explain)

Radeon R7 370 4G		179200 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 19200 (12%)

Texel Rate

The Radeon R9 M390X is much (more or less 48%) faster with regards to anisotropic filtering than the Radeon R7 370 4G. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon R7 370 4G		62400 Mtexels/sec
	Difference: 30144 (48%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R7 370 4G is a better choice, by a large margin. (explain)

Radeon R7 370 4G		31200 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 8064 (35%)

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 maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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