Radeon HD 6790 vs Radeon R9 380 2G

Intro

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

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 380 2G		8850 points
Radeon HD 6790		2150 points
	Difference: 6700 (312%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon R9 380 2G		190 Watts
	Difference: 40 Watts (27%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 2G is 36% faster than the Radeon HD 6790 in general, because of its greater bandwidth. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 48000 (36%)

Texel Rate

The Radeon R9 380 2G will be much (approximately 223%) more effective at AF than the Radeon HD 6790. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 75040 (223%)

Pixel Rate

The Radeon R9 380 2G is quite a bit (more or less 131%) faster with regards to full screen anti-aliasing than the Radeon HD 6790, and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 17600 (131%)

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 maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.