Radeon HD 5770 vs Radeon R9 270X

Intro

Compare all of that to the Radeon R9 270X, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory works at a speed of 1400 MHz on this specific model. It features 1280 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

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

As far as performance goes, the Radeon R9 270X should theoretically be a lot better 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 will be much (about 135%) better 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 will be much (approximately 135%) more effective at full screen anti-aliasing than the Radeon HD 5770, and able to handle higher resolutions without slowing down too much. (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: Bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.