Radeon HD 4670 1GB vs Radeon R9 380 2G

Intro

Compare all that to the Radeon R9 380 2G, which features a GPU core clock speed of 970 MHz, and 2048 MB of GDDR5 RAM set to run at 1425 MHz through a 256-bit bus. It also features 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

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

As far as performance goes, the Radeon R9 380 2G should in theory be quite a bit superior to the Radeon HD 4670 1GB in general. (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 is much (about 353%) faster with regards to 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 is much (more or less 417%) more effective at full screen anti-aliasing than the Radeon HD 4670 1GB, and also should be capable of handling higher screen resolutions without losing too much performance. (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: Bandwidth is the largest amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.