Radeon HD 4670 1GB vs Radeon R9 380 2G

Intro

Compare those specifications to the Radeon R9 380 2G, which comes with GPU clock speed of 970 MHz, and 2048 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also features 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
Radeon R9 380 2G		190 Watts
	Difference: 120 Watts (171%)

Memory Bandwidth

In theory, the Radeon R9 380 2G should be a lot faster than the Radeon HD 4670 1GB overall. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 147200 (418%)

Texel Rate

The Radeon R9 380 2G will be much (approximately 353%) more effective at AF than the Radeon HD 4670 1GB. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 84640 (353%)

Pixel Rate

The Radeon R9 380 2G will be quite a bit (approximately 417%) better at full screen anti-aliasing than the Radeon HD 4670 1GB, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 25040 (417%)

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 (counted in MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core 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 is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.