Geforce GTX 780 vs Radeon HD 6870

Intro

Compare those specs to the Radeon HD 6870, which comes with GPU clock speed of 900 MHz, and 1024 MB of GDDR5 RAM set to run at 1050 MHz through a 256-bit bus. It also is made up of 1120 SPUs, 56 TAUs, 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

As far as performance goes, the Geforce GTX 780 should theoretically be a lot better than the Radeon HD 6870 overall. (explain)

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

Texel Rate

The Geforce GTX 780 will be a lot (about 229%) faster with regards to AF than the Radeon HD 6870. (explain)

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

Pixel Rate

The Geforce GTX 780 should be much (more or less 44%) more effective at AA than the Radeon HD 6870, and should be capable of handling higher resolutions more effectively. (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: Bandwidth is the largest amount of information (measured in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.