Radeon HD 4670 512MB vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which makes use of a 28 nm design. AMD has clocked the core speed at 970 MHz. The GDDR5 memory runs at a speed of 1425 MHz on this card. It features 1792 SPUs along with 112 Texture Address Units and 32 Rasterization Operator 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

Theoretically speaking, the Radeon R9 380 4G should be 470% quicker than the Radeon HD 4670 512MB in general, because of its higher data rate. (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 is much (more or less 353%) better at AF 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 running with high levels of AA is important to you, then the Radeon R9 380 4G is superior to the Radeon HD 4670 512MB, by a large margin. (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 max amount of information (counted in MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of 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 processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write 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 - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.