Radeon HD 7990 vs Radeon R9 380 4G

Intro

Compare all that to the Radeon R9 380 4G, which comes with GPU core speed of 970 MHz, and 4096 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also features 1792 SPUs, 112 Texture Address Units, and 32 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 HD 7990		15520 points
Radeon R9 380 4G		8837 points
	Difference: 6683 (76%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Radeon R9 380 4G		21 Mh/s
	Difference: 11 (52%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 4G		190 Watts
Radeon HD 7990		375 Watts
	Difference: 185 Watts (97%)

Memory Bandwidth

Performance-wise, the Radeon HD 7990 should in theory be a lot superior to the Radeon R9 380 4G overall. (explain)

Radeon HD 7990		576000 MB/sec
Radeon R9 380 4G		182400 MB/sec
	Difference: 393600 (216%)

Texel Rate

The Radeon HD 7990 will be quite a bit (more or less 124%) faster with regards to texture filtering than the Radeon R9 380 4G. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon R9 380 4G		108640 Mtexels/sec
	Difference: 134560 (124%)

Pixel Rate

The Radeon HD 7990 will be quite a bit (more or less 96%) better at AA than the Radeon R9 380 4G, and also capable of handling higher resolutions better. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon R9 380 4G		31040 Mpixels/sec
	Difference: 29760 (96%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.