Radeon HD 5770 vs Radeon R9 380X

Intro

Compare all of that to the Radeon R9 380X, which uses a 28 nm design. AMD has clocked the core speed at 970 MHz. The GDDR5 memory works at a speed of 1425 MHz on this particular model. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator 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, in theory, should be a lot faster than the Radeon HD 5770 overall. (explain)

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

Texel Rate

The Radeon R9 380X should be quite a bit (approximately 265%) better at 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 running with a high resolution is important to you, then the Radeon R9 380X is a better choice, by a large margin. (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 (counted in MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on 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 reach the max fill rate.