Geforce GTX 770 vs Radeon HD 6870

Intro

Compare all of that to the Radeon HD 6870, which has clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 1120 SPUs as well as 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 770		7854 points
Radeon HD 6870		2870 points
	Difference: 4984 (174%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870		151 Watts
Geforce GTX 770		230 Watts
	Difference: 79 Watts (52%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 770 should in theory be quite a bit better than the Radeon HD 6870 overall. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 6870		134400 MB/sec
	Difference: 89984 (67%)

Texel Rate

The Geforce GTX 770 is quite a bit (about 166%) faster with regards to AF than the Radeon HD 6870. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 6870		50400 Mtexels/sec
	Difference: 83488 (166%)

Pixel Rate

The Geforce GTX 770 will be a little bit (about 16%) better at anti-aliasing than the Radeon HD 6870, and will be capable of handling higher resolutions more effectively. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 6870		28800 Mpixels/sec
	Difference: 4672 (16%)

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 maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.