Radeon HD 7790 vs Radeon R9 380 4G

Intro

Compare all that to the Radeon R9 380 4G, which uses a 28 nm design. AMD has clocked the core frequency at 970 MHz. The GDDR5 RAM runs at a speed of 1425 MHz on this card. It features 1792 SPUs as well as 112 TAUs 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 380 4G		8837 points
Radeon HD 7790		4330 points
	Difference: 4507 (104%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 380 4G		190 Watts
	Difference: 105 Watts (124%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 4G should in theory be a lot superior to the Radeon HD 7790 overall. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 86400 (90%)

Texel Rate

The Radeon R9 380 4G is much (about 94%) better at AF than the Radeon HD 7790. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 52640 (94%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 380 4G is superior to the Radeon HD 7790, by far. (explain)

Radeon R9 380 4G		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: Bandwidth is the largest amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 are processed per second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video 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 record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.