Radeon HD 6790 vs Radeon R9 380 2G

Intro

Compare those specifications to the Radeon R9 380 2G, which uses a 28 nm design. AMD has clocked the core frequency at 970 MHz. The GDDR5 RAM is set to run at a frequency of 1425 MHz on this model. It features 1792 SPUs along with 112 Texture Address Units 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, the Radeon R9 380 2G should perform a lot faster than the Radeon HD 6790 in general. (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 a lot (more or less 223%) faster with regards to anisotropic filtering 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 will be quite a bit (about 131%) better at AA than the Radeon HD 6790, and also should be able to handle higher screen resolutions without slowing down too much. (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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the 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 that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.