Radeon HD 4670 512MB vs Radeon R9 380 4G

Intro

Compare all that to the Radeon R9 380 4G, which features GPU clock speed of 970 MHz, and 4096 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also is made up of 1792 SPUs, 112 Texture Address Units, 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 4G		190 Watts
	Difference: 120 Watts (171%)

Memory Bandwidth

The Radeon R9 380 4G, in theory, should perform a lot faster than the Radeon HD 4670 512MB overall. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 150400 (470%)

Texel Rate

The Radeon R9 380 4G will be much (about 353%) better at texture filtering than the Radeon HD 4670 512MB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 84640 (353%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 380 4G is a better choice, by far. (explain)

Radeon R9 380 4G		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 (in units of megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, 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 maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.