Radeon HD 6790 vs Radeon R9 390 8G

Intro

Compare all that to the Radeon R9 390 8G, which features GPU core speed of 1000 MHz, and 8192 MB of GDDR5 RAM set to run at 1500 MHz through a 512-bit bus. It also is made up of 2560 Stream Processors, 160 Texture Address Units, and 64 Raster Operation 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 390 8G		12733 points
Radeon HD 6790		2150 points
	Difference: 10583 (492%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon R9 390 8G		275 Watts
	Difference: 125 Watts (83%)

Memory Bandwidth

The Radeon R9 390 8G, in theory, should be much faster than the Radeon HD 6790 in general. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 249600 (186%)

Texel Rate

The Radeon R9 390 8G should be quite a bit (more or less 376%) faster with regards to texture filtering than the Radeon HD 6790. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 126400 (376%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 390 8G is superior to the Radeon HD 6790, by a large margin. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 50560 (376%)

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 (measured in megabytes per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.