Radeon HD 5770 vs Radeon R9 270X

Intro

Compare that to the Radeon R9 270X, which comes with core speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
Radeon R9 270X		180 Watts
	Difference: 72 Watts (67%)

Memory Bandwidth

In theory, the Radeon R9 270X should be a lot faster than the Radeon HD 5770 overall. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 102400 (133%)

Texel Rate

The Radeon R9 270X is quite a bit (about 135%) more effective at anisotropic filtering than the Radeon HD 5770. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 46000 (135%)

Pixel Rate

The Radeon R9 270X is much (approximately 135%) more effective at AA than the Radeon HD 5770, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 18400 (135%)

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 data (counted in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be applied 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 higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.