Radeon R9 380X vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which features core clock speeds of 900 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs along with 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon R9 380X		190 Watts
	Difference: 115 Watts (153%)

Memory Bandwidth

Performance-wise, the Radeon R9 380X should theoretically be a lot better than the Radeon R9 M280X overall. (explain)

Radeon R9 380X		182400 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 94400 (107%)

Texel Rate

The Radeon R9 380X should be a lot (approximately 146%) more effective at AF than the Radeon R9 M280X. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 73760 (146%)

Pixel Rate

The Radeon R9 380X will be quite a bit (approximately 116%) better at full screen anti-aliasing than the Radeon R9 M280X, and will be capable of handling higher screen resolutions better. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 16640 (116%)

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 largest amount of data (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units by the core 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.