GeForce GTX 780 Ti vs Radeon HD 6990

Intro

Compare all that to the Radeon HD 6990, which makes use of a 40 nm design. AMD has set the core frequency at 830 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this specific model. It features 1536 SPUs as well as 96 Texture Address Units 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

GeForce GTX 780 Ti		10900 points
Radeon HD 6990		5820 points
	Difference: 5080 (87%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
GeForce GTX 780 Ti		19 Mh/s
	Difference: 5 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 780 Ti		250 Watts
Radeon HD 6990		375 Watts
	Difference: 125 Watts (50%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 780 Ti will be 5% faster than the Radeon HD 6990 overall, due to its higher bandwidth. (explain)

GeForce GTX 780 Ti		336000 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 16000 (5%)

Texel Rate

The GeForce GTX 780 Ti should be much (about 32%) faster with regards to texture filtering than the Radeon HD 6990. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 50640 (32%)

Pixel Rate

The Radeon HD 6990 will be much (approximately 26%) faster with regards to full screen anti-aliasing than the GeForce GTX 780 Ti, and also should be able to handle higher screen resolutions better. (explain)

Radeon HD 6990		53120 Mpixels/sec
GeForce GTX 780 Ti		42000 Mpixels/sec
	Difference: 11120 (26%)

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 moved past the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, 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 record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends 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 reach the maximum fill rate.