Geforce GTX 670 vs Radeon HD 6770

Intro

Compare all that to the Radeon HD 6770, which comes with GPU clock speed of 900 MHz, and 512 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also is comprised of 800 Stream Processors, 40 Texture Address Units, and 16 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 670		7351 points
Radeon HD 6770		1520 points
	Difference: 5831 (384%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
Geforce GTX 670		170 Watts
	Difference: 62 Watts (57%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 670 should in theory be quite a bit superior to the Radeon HD 6770 overall. (explain)

Geforce GTX 670		192000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 124800 (186%)

Texel Rate

The Geforce GTX 670 should be quite a bit (about 185%) more effective at AF than the Radeon HD 6770. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 66480 (185%)

Pixel Rate

The Geforce GTX 670 should be a lot (about 103%) more effective at anti-aliasing than the Radeon HD 6770, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 14880 (103%)

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 largest amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.