Radeon HD 6990 vs Radeon R9 380X

Intro

Compare those specs to the Radeon R9 380X, which comes with GPU core speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 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 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

The Radeon HD 6990 should in theory be much faster than 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 is much (more or less 28%) better at texture 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 running with a high resolution is important to you, then the Radeon HD 6990 is a better choice, by a large margin. (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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher 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 in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.