GeForce GTX 970 vs Radeon HD 6990

Intro

Compare those specs to the Radeon HD 6990, which has GPU clock speed of 830 MHz, and 2048 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also is made up of 1536 Stream Processors, 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 970		10867 points
Radeon HD 6990		5820 points
	Difference: 5047 (87%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
GeForce GTX 970		19 Mh/s
	Difference: 5 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970		145 Watts
Radeon HD 6990		375 Watts
	Difference: 230 Watts (159%)

Memory Bandwidth

In theory, the Radeon HD 6990 should be quite a bit faster than the GeForce GTX 970 overall. (explain)

Radeon HD 6990		320000 MB/sec
GeForce GTX 970		224000 MB/sec
	Difference: 96000 (43%)

Texel Rate

The Radeon HD 6990 is a lot (more or less 46%) more effective at AF than the GeForce GTX 970. (explain)

Radeon HD 6990		159360 Mtexels/sec
GeForce GTX 970		109200 Mtexels/sec
	Difference: 50160 (46%)

Pixel Rate

The GeForce GTX 970 is a lot (more or less 27%) more effective at anti-aliasing than the Radeon HD 6990, and will be capable of handling higher resolutions better. (explain)

GeForce GTX 970		67200 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 14080 (27%)

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 max amount of information (measured in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.