GeForce GTX 660 Ti vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which makes use of a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 RAM is set to run at a frequency of 1050 MHz on this particular model. It features 800 SPUs along with 40 TAUs 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 660 Ti		6013 points
Radeon HD 6770		1520 points
	Difference: 4493 (296%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 42 Watts (39%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 Ti will be 114% faster than the Radeon HD 6770 overall, because of its higher data rate. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 76800 (114%)

Texel Rate

The GeForce GTX 660 Ti should be much (about 185%) better at anisotropic filtering than the Radeon HD 6770. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 66480 (185%)

Pixel Rate

The GeForce GTX 660 Ti is much (about 53%) more effective at FSAA than the Radeon HD 6770, and able to handle higher resolutions while still performing well. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 7560 (53%)

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 information (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high 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 amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at 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 can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.