Radeon HD 6850 vs Radeon R9 M275X

Intro

Compare all that to the Radeon R9 M275X, which makes use of a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory is set to run at a frequency of 1125 MHz on this specific card. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
Radeon HD 6850		127 Watts
	Difference: 77 Watts (154%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6850 should be quite a bit faster than the Radeon R9 M275X overall. (explain)

Radeon HD 6850		128000 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The Radeon HD 6850 is a bit (about 3%) faster with regards to AF than the Radeon R9 M275X. (explain)

Radeon HD 6850		37200 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 1200 (3%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6850 is superior to the Radeon R9 M275X, by far. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 10400 (72%)

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 maximum amount of data (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 processed per second. This figure is calculated by multiplying the total amount of texture units 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out 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 filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.