Radeon HD 5770 vs Radeon R9 380 4G

Intro

Compare all that to the Radeon R9 380 4G, which uses a 28 nm design. AMD has set the core frequency at 970 MHz. The GDDR5 memory is set to run at a frequency of 1425 MHz on this particular model. It features 1792 SPUs as well as 112 TAUs 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 380 4G		190 Watts
	Difference: 82 Watts (76%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G should perform much faster than the Radeon HD 5770 in general. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 105600 (138%)

Texel Rate

The Radeon R9 380 4G will be a lot (about 220%) faster with regards to texture filtering than the Radeon HD 5770. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 74640 (220%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 380 4G is a better choice, by a large margin. (explain)

Radeon R9 380 4G		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 megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.