GeForce GTX 860M vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which has a clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
Radeon R9 M390X		125 Watts
	Difference: 80 Watts (178%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be much faster than the GeForce GTX 860M overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon R9 M390X should be quite a bit (approximately 21%) more effective at texture filtering than the GeForce GTX 860M. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 860M		76512 Mtexels/sec
	Difference: 16032 (21%)

Pixel Rate

The Radeon R9 M390X will be quite a bit (approximately 81%) better at AA than the GeForce GTX 860M, and also capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 10384 (81%)

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 (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 can be processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of 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 fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.