Radeon HD 6990 vs Radeon R9 380X

Intro

Compare those specs to the Radeon R9 380X, which has core clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 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 380X		9519 points
Radeon HD 6990		5820 points
	Difference: 3699 (64%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
Radeon R9 380X		19 Mh/s
	Difference: 5 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Radeon HD 6990 should theoretically be a lot superior to the Radeon R9 380X in general. (explain)

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

Texel Rate

The Radeon HD 6990 will be quite a bit (more or less 28%) faster with regards to anisotropic filtering than the Radeon R9 380X. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon R9 380X		124160 Mtexels/sec
	Difference: 35200 (28%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6990 is the winner, and very much so. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon R9 380X		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 maximum amount of data (measured in MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's 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 also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.