Radeon HD 5770 vs Radeon R9 380 4G

Intro

Compare that to the Radeon R9 380 4G, which has a core clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It is comprised of 1792 SPUs, 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

The Radeon R9 380 4G should theoretically be a lot 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 (approximately 220%) more effective at anisotropic 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 running with a high resolution is important to you, then the Radeon R9 380 4G is a better choice, and very much so. (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: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the 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 are processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.