Radeon HD 7790 vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which features GPU clock 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 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 390 8G		12733 points
Radeon HD 7790		4330 points
	Difference: 8403 (194%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 390 8G		275 Watts
	Difference: 190 Watts (224%)

Memory Bandwidth

The Radeon R9 390 8G should in theory perform much faster than the Radeon HD 7790 in general. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 288000 (300%)

Texel Rate

The Radeon R9 390 8G is quite a bit (more or less 186%) better at anisotropic filtering than the Radeon HD 7790. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 104000 (186%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 390 8G is superior to the Radeon HD 7790, by far. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 48000 (300%)

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 (measured in megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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 memory bandwidth is, the lower the potential to reach the max fill rate.