Radeon HD 7790 vs Radeon R9 380X

Intro

Compare all that to the Radeon R9 380X, which features GPU core speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also features 2048 SPUs, 128 Texture Address Units, and 32 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 380X		9519 points
Radeon HD 7790		4330 points
	Difference: 5189 (120%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 380X		190 Watts
	Difference: 105 Watts (124%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380X should in theory be a lot superior to the Radeon HD 7790 overall. (explain)

Radeon R9 380X		182400 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 86400 (90%)

Texel Rate

The Radeon R9 380X should be much (about 122%) more effective at texture filtering than the Radeon HD 7790. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 68160 (122%)

Pixel Rate

The Radeon R9 380X will be a lot (about 94%) faster with regards to AA than the Radeon HD 7790, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 15040 (94%)

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 (counted in megabytes per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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