Radeon HD 4670 512MB vs Radeon R9 380 2G

Intro

Compare that to the Radeon R9 380 2G, which makes use of a 28 nm design. AMD has set the core speed at 970 MHz. The GDDR5 memory is set to run at a speed of 1425 MHz on this specific card. It features 1792 SPUs as well as 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

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 much faster than the Radeon HD 4670 512MB overall. (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 much (more or less 353%) better 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 high levels of AA is important to you, then the Radeon R9 380 2G is the winner, and very much so. (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 maximum amount of information (in units of MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is worked out 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.