Radeon HD 4770 vs Radeon R9 380 2G

Intro

Compare those specifications to the Radeon R9 380 2G, which features core clock speeds of 970 MHz on the GPU, and 1425 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
Radeon R9 380 2G		190 Watts
	Difference: 110 Watts (138%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 2G is 256% faster than the Radeon HD 4770 in general, due to its higher data rate. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 131200 (256%)

Texel Rate

The Radeon R9 380 2G should be much (more or less 353%) more effective at anisotropic filtering than the Radeon HD 4770. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 84640 (353%)

Pixel Rate

The Radeon R9 380 2G will be quite a bit (about 159%) faster with regards to FSAA than the Radeon HD 4770, and also should be able to handle higher screen resolutions better. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 19040 (159%)

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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units 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 ability to reach the maximum fill rate.