Radeon HD 7850 vs Radeon R9 M280X

Intro

Compare all of that to the Radeon R9 M280X, which comes with GPU core speed of 900 MHz, and 4096 MB of GDDR5 RAM set to run at 1375 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon HD 7850		130 Watts
	Difference: 55 Watts (73%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7850 will be 75% quicker than the Radeon R9 M280X overall, due to its greater data rate. (explain)

Radeon HD 7850		153600 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 65600 (75%)

Texel Rate

The Radeon HD 7850 is a bit (approximately 9%) faster with regards to anisotropic filtering than the Radeon R9 M280X. (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 4640 (9%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 7850 is the winner, by far. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 13120 (91%)

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 transferred over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.