Radeon R7 240 vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which features core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon R9 M390X		125 Watts
	Difference: 95 Watts (317%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X will be 456% faster than the Radeon R7 240 in general, because of its greater bandwidth. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 131200 (456%)

Texel Rate

The Radeon R9 M390X will be much (approximately 534%) faster with regards to AF than the Radeon R7 240. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 77944 (534%)

Pixel Rate

The Radeon R9 M390X should be a lot (approximately 296%) better at FSAA than the Radeon R7 240, and also capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 17296 (296%)

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 transferred over the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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