Radeon HD 5770 vs Radeon R9 M275X

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
Radeon HD 5770		108 Watts
	Difference: 58 Watts (116%)

Memory Bandwidth

Theoretically, the Radeon HD 5770 should perform a small bit faster than the Radeon R9 M275X in general. (explain)

Radeon HD 5770		76800 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 4800 (7%)

Texel Rate

The Radeon R9 M275X is a small bit (about 6%) more effective at anisotropic filtering than the Radeon HD 5770. (explain)

Radeon R9 M275X		36000 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 2000 (6%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M275X is superior to the Radeon HD 5770, but only just. (explain)

Radeon R9 M275X		14400 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 800 (6%)

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 megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 can be processed in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.