Radeon HD 6990 vs Radeon R9 380X

Intro

Compare those specifications to the Radeon R9 380X, which has 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 Texture Address Units and 32 ROPs.

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 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

In theory, the Radeon HD 6990 should be 75% quicker than the Radeon R9 380X in general, due to its higher data rate. (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

The Radeon HD 6990 is quite a bit (approximately 71%) faster with regards to AA than the Radeon R9 380X, and also will be capable of handling higher screen resolutions without slowing down too much. (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 largest amount of information (in units of megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.