GeForce GTX 480 vs Radeon HD 5770

Intro

Compare all of that to the Radeon HD 5770, which makes use of a 40 nm design. AMD has set the core speed at 850 MHz. The GDDR5 RAM runs at a frequency of 1200 MHz on this particular card. It features 800(160x5) SPUs along with 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 480		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 should be 131% quicker than the Radeon HD 5770 in general, because of its higher bandwidth. (explain)

GeForce GTX 480		177408 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 100608 (131%)

Texel Rate

The GeForce GTX 480 is much (about 24%) faster with regards to AF than the Radeon HD 5770. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 8000 (24%)

Pixel Rate

The GeForce GTX 480 is quite a bit (approximately 147%) more effective at AA than the Radeon HD 5770, and also able to handle higher resolutions while still performing well. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 20000 (147%)

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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core 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 ability to get to the maximum fill rate.