Radeon HD 5770 vs Radeon R9 280X

Intro

Compare those specifications to the Radeon R9 280X, which uses a 28 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 memory works at a speed of 1500 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
Radeon R9 280X		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

In theory, the Radeon R9 280X is 275% faster than the Radeon HD 5770 overall, due to its higher data rate. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 211200 (275%)

Texel Rate

The Radeon R9 280X will be a lot (more or less 220%) more effective at AF than the Radeon HD 5770. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 74800 (220%)

Pixel Rate

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

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 13600 (100%)

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 (in units of MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.