Radeon HD 4670 512MB vs Radeon R9 380 2G

Intro

Compare those specs to the Radeon R9 380 2G, which features a clock frequency of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It 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 512MB		70 Watts
Radeon R9 380 2G		190 Watts
	Difference: 120 Watts (171%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 2G should be a lot faster than the Radeon HD 4670 512MB in general. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 150400 (470%)

Texel Rate

The Radeon R9 380 2G will be a lot (more or less 353%) more effective at anisotropic filtering than the Radeon HD 4670 512MB. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 84640 (353%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 380 2G is superior to the Radeon HD 4670 512MB, by a large margin. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon HD 4670 512MB		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 largest amount of information (counted in MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.