Geforce GTX 780 vs Radeon HD 6870

Intro

Compare those specs to the Radeon HD 6870, which has a core clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It is made up of 1120 SPUs, 56 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		10082 points
Radeon HD 6870		2870 points
	Difference: 7212 (251%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870		151 Watts
Geforce GTX 780		250 Watts
	Difference: 99 Watts (66%)

Memory Bandwidth

Performance-wise, the Geforce GTX 780 should theoretically be much superior to the Radeon HD 6870 in general. (explain)

Geforce GTX 780		288384 MB/sec
Radeon HD 6870		134400 MB/sec
	Difference: 153984 (115%)

Texel Rate

The Geforce GTX 780 will be much (about 229%) better at AF than the Radeon HD 6870. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon HD 6870		50400 Mtexels/sec
	Difference: 115296 (229%)

Pixel Rate

If running with a high resolution is important to you, then the Geforce GTX 780 is superior to the Radeon HD 6870, and very much so. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon HD 6870		28800 Mpixels/sec
	Difference: 12624 (44%)

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.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.