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Radeon R7 M360 vs Radeon R9 M390X

Intro

The Radeon R7 M360 has core clock speeds of 1125 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

Compare those specs to the Radeon R9 M390X, which comes with core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should perform quite a bit faster than the Radeon R7 M360 overall. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon R7 M360		16000 MB/sec
	Difference: 144000 (900%)

Texel Rate

The Radeon R9 M390X is much (approximately 243%) better at anisotropic filtering than the Radeon R7 M360. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon R7 M360		27000 Mtexels/sec
	Difference: 65544 (243%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M390X is a better choice, by a large margin. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon R7 M360		9000 Mpixels/sec
	Difference: 14136 (157%)

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

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Radeon R7 M360

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Radeon R9 M390X

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Specifications

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Model	Radeon R7 M360	Radeon R9 M390X
Manufacturer	AMD	AMD
Year	2015	2015
Code Name	Oland	Tonga
Memory	2048 MB	4096 MB
Core Speed	1125 MHz	723 MHz
Memory Speed	2000 MHz	5000 MHz
Power (Max TDP)	(Unknown) watts	125 watts
Bandwidth	16000 MB/sec	160000 MB/sec
Texel Rate	27000 Mtexels/sec	92544 Mtexels/sec
Pixel Rate	9000 Mpixels/sec	23136 Mpixels/sec
Unified Shaders	384	2048
Texture Mapping Units	24	128
Render Output Units	8	32
Bus Type	DDR3	GDDR5
Bus Width	64-bit	256-bit
Fab Process	28 nm	28 nm
Transistors	(Unknown) million	(Unknown) million
Bus	PCIe 3.0 x16	PCIe 3.0 x16
DirectX Version	DirectX 12	DirectX 12
OpenGL Version	OpenGL 4.3	OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the 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 the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

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