GeForce GTX 660 Ti vs Radeon HD 5770

Intro

Compare all of that to the Radeon HD 5770, which makes use of a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this specific card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 42 Watts (39%)

Memory Bandwidth

The GeForce GTX 660 Ti, in theory, should perform a lot faster than the Radeon HD 5770 overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 67200 (88%)

Texel Rate

The GeForce GTX 660 Ti should be quite a bit (more or less 201%) faster with regards to AF than the Radeon HD 5770. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 68480 (201%)

Pixel Rate

The GeForce GTX 660 Ti will be a lot (approximately 61%) better at AA than the Radeon HD 5770, and also capable of handling higher resolutions more effectively. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 8360 (61%)

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 (measured in megabytes per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.