GeForce 8800 GT 1GB vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which uses a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 memory works at a frequency of 1200 MHz on this particular card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 1GB		105 Watts
Radeon HD 5770		108 Watts
	Difference: 3 Watts (3%)

Memory Bandwidth

Theoretically, the Radeon HD 5770 should perform a lot faster than the GeForce 8800 GT 1GB overall. (explain)

Radeon HD 5770		76800 MB/sec
GeForce 8800 GT 1GB		57600 MB/sec
	Difference: 19200 (33%)

Texel Rate

The Radeon HD 5770 should be a little bit (about 1%) more effective at AF than the GeForce 8800 GT 1GB. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce 8800 GT 1GB		33600 Mtexels/sec
	Difference: 400 (1%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 5770 is a better choice, by a large margin. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce 8800 GT 1GB		9600 Mpixels/sec
	Difference: 4000 (42%)

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 max amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out 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 filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.