GeForce GTX 470 vs Radeon HD 6990

Intro

Compare those specs to the Radeon HD 6990, which features GPU core speed of 830 MHz, and 2048 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also features 1536 Stream Processors, 96 Texture Address Units, and 32 Raster Operation Units.

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 HD 6990		5820 points
GeForce GTX 470		2937 points
	Difference: 2883 (98%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 470		215 Watts
Radeon HD 6990		375 Watts
	Difference: 160 Watts (74%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 is 139% faster than the GeForce GTX 470 in general, due to its greater data rate. (explain)

Radeon HD 6990		320000 MB/sec
GeForce GTX 470		133920 MB/sec
	Difference: 186080 (139%)

Texel Rate

The Radeon HD 6990 will be quite a bit (more or less 369%) better at texture filtering than the GeForce GTX 470. (explain)

Radeon HD 6990		159360 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 125368 (369%)

Pixel Rate

The Radeon HD 6990 should be a lot (approximately 119%) better at FSAA than the GeForce GTX 470, and capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6990		53120 Mpixels/sec
GeForce GTX 470		24280 Mpixels/sec
	Difference: 28840 (119%)

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 largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If it uses 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.