GeForce GTX 295 vs Radeon HD 6790

Intro

Compare those specs to the Radeon HD 6790, which features a core clock speed of 840 MHz and a GDDR5 memory speed of 1050 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It features 800 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
GeForce GTX 295		289 Watts
	Difference: 139 Watts (93%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 295 should theoretically be much better than the Radeon HD 6790 in general. (explain)

GeForce GTX 295		223776 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 89376 (67%)

Texel Rate

The GeForce GTX 295 is quite a bit (approximately 174%) better at AF than the Radeon HD 6790. (explain)

GeForce GTX 295		92160 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 58560 (174%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 295 is superior to the Radeon HD 6790, and very much so. (explain)

GeForce GTX 295		32256 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 18816 (140%)

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 (counted in megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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 a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.