Radeon HD 6770 vs Radeon HD 6850

Intro

Compare all of that to the Radeon HD 6850, which features a core clock frequency of 775 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It features 960 SPUs, 48 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

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

Radeon HD 6850		2395 points
Radeon HD 6770		1520 points
	Difference: 875 (58%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
Radeon HD 6850		127 Watts
	Difference: 19 Watts (18%)

Memory Bandwidth

The Radeon HD 6850 should theoretically perform quite a bit faster than the Radeon HD 6770 overall. (explain)

Radeon HD 6850		128000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 60800 (90%)

Texel Rate

The Radeon HD 6850 is just a bit (about 3%) more effective at texture filtering than the Radeon HD 6770. (explain)

Radeon HD 6850		37200 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 1200 (3%)

Pixel Rate

The Radeon HD 6850 is much (approximately 72%) more effective at AA than the Radeon HD 6770, and should be able to handle higher resolutions more effectively. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 10400 (72%)

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 MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.