Radeon HD 7990 vs Radeon R9 380 2G

Intro

Compare all of that to the Radeon R9 380 2G, which uses a 28 nm design. AMD has set the core frequency at 970 MHz. The GDDR5 RAM works at a frequency of 1425 MHz on this specific model. It features 1792 SPUs as well as 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

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 2G		8850 points
	Difference: 6670 (75%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Radeon R9 380 2G		19 Mh/s
	Difference: 13 (68%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 2G		190 Watts
Radeon HD 7990		375 Watts
	Difference: 185 Watts (97%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 will be 216% faster than the Radeon R9 380 2G in general, because of its higher data rate. (explain)

Radeon HD 7990		576000 MB/sec
Radeon R9 380 2G		182400 MB/sec
	Difference: 393600 (216%)

Texel Rate

The Radeon HD 7990 will be a lot (about 124%) more effective at texture filtering than the Radeon R9 380 2G. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon R9 380 2G		108640 Mtexels/sec
	Difference: 134560 (124%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7990 is a better choice, by a large margin. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon R9 380 2G		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: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units 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 output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.