Radeon R9 M280X vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which uses a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this card. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon R9 M395X		125 Watts
	Difference: 50 Watts (67%)

Memory Bandwidth

The Radeon R9 M395X should in theory perform a lot faster than the Radeon R9 M280X overall. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 72000 (82%)

Texel Rate

The Radeon R9 M395X is quite a bit (approximately 84%) more effective at AF than the Radeon R9 M280X. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 42144 (84%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M395X is a better choice, by a large margin. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 8736 (61%)

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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at 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 could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.