Radeon HD 5770 vs Radeon R9 380X

Intro

Compare those specifications to the Radeon R9 380X, which features a GPU core clock speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
Radeon R9 380X		190 Watts
	Difference: 82 Watts (76%)

Memory Bandwidth

The Radeon R9 380X should in theory be a lot faster than the Radeon HD 5770 in general. (explain)

Radeon R9 380X		182400 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 105600 (138%)

Texel Rate

The Radeon R9 380X will be quite a bit (about 265%) faster with regards to texture filtering than the Radeon HD 5770. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 90160 (265%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 380X is a better choice, and very much so. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 17440 (128%)

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 data (in units of MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.