Radeon HD 6990 vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which has core clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 memory. It features 1792 SPUs as well as 112 TAUs and 32 Rasterization Operator 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 R9 380 4G		8837 points
Radeon HD 6990		5820 points
	Difference: 3017 (52%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
Radeon R9 380 4G		21 Mh/s
	Difference: 3 (14%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 4G		190 Watts
Radeon HD 6990		375 Watts
	Difference: 185 Watts (97%)

Memory Bandwidth

In theory, the Radeon HD 6990 should be quite a bit faster than the Radeon R9 380 4G overall. (explain)

Radeon HD 6990		320000 MB/sec
Radeon R9 380 4G		182400 MB/sec
	Difference: 137600 (75%)

Texel Rate

The Radeon HD 6990 is much (approximately 47%) faster with regards to anisotropic filtering than the Radeon R9 380 4G. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon R9 380 4G		108640 Mtexels/sec
	Difference: 50720 (47%)

Pixel Rate

The Radeon HD 6990 will be much (more or less 71%) better at anti-aliasing than the Radeon R9 380 4G, and will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon R9 380 4G		31040 Mpixels/sec
	Difference: 22080 (71%)

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 largest amount of data (in units of MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.