Radeon HD 6790 vs Radeon R9 390X 8G

Intro

Compare those specs to the Radeon R9 390X 8G, which has a core clock speed of 1050 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 512-bit bus, and uses a 28 nm design. It is made up of 2816 SPUs, 176 TAUs, and 64 ROPs.

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 390X 8G		13555 points
Radeon HD 6790		2150 points
	Difference: 11405 (530%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon R9 390X 8G, in theory, should be quite a bit faster than the Radeon HD 6790 overall. (explain)

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

Texel Rate

The Radeon R9 390X 8G is quite a bit (about 450%) more effective at AF than the Radeon HD 6790. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 151200 (450%)

Pixel Rate

The Radeon R9 390X 8G should be quite a bit (about 400%) better at FSAA than the Radeon HD 6790, and should be able to handle higher resolutions while still performing well. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 53760 (400%)

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 largest amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends 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.