GeForce GTX 980 Ti vs Radeon HD 6990

Intro

Compare those specs to the Radeon HD 6990, which features core speeds of 830 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs along with 96 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

GeForce GTX 980 Ti		17120 points
Radeon HD 6990		5820 points
	Difference: 11300 (194%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
GeForce GTX 980 Ti		22 Mh/s
	Difference: 2 (9%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980 Ti		250 Watts
Radeon HD 6990		375 Watts
	Difference: 125 Watts (50%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980 Ti should theoretically be just a bit superior to the Radeon HD 6990 overall. (explain)

GeForce GTX 980 Ti		336000 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 16000 (5%)

Texel Rate

The GeForce GTX 980 Ti is a bit (more or less 10%) better at AF than the Radeon HD 6990. (explain)

GeForce GTX 980 Ti		176000 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 16640 (10%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 980 Ti is superior to the Radeon HD 6990, by a large margin. (explain)

GeForce GTX 980 Ti		96000 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 42880 (81%)

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 (measured in MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.