GeForce GT 220 GDDR3 vs Radeon HD 6770 1GB

Intro

Compare those specs to the Radeon HD 6770 1GB, which makes use of a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory runs at a speed of 1050 MHz on this card. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 50 Watts (86%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 1GB should be 108% faster than the GeForce GT 220 GDDR3 in general, due to its greater data rate. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 34816 (108%)

Texel Rate

The Radeon HD 6770 1GB is much (about 260%) more effective at texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 26000 (260%)

Pixel Rate

The Radeon HD 6770 1GB is quite a bit (more or less 188%) more effective at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also will be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 9400 (188%)

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 largest amount of data (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.