Radeon R9 280 vs Radeon R9 M385X

Intro

Compare those specs to the Radeon R9 M385X, which features a GPU core clock speed of 1100 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 280 should perform a lot faster than the Radeon R9 M385X overall. (explain)

Radeon R9 280		240000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 144000 (150%)

Texel Rate

The Radeon R9 280 should be a lot (about 70%) more effective at AF than the Radeon R9 M385X. (explain)

Radeon R9 280		104496 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 42896 (70%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 280 is superior to the Radeon R9 M385X, and very much so. (explain)

Radeon R9 280		29856 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 12256 (70%)

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 information (counted in MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 get to the max fill rate.