GeForce GT 220 GDDR3 vs Radeon HD 6790

Intro

Compare all of that to the Radeon HD 6790, which features core clock speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 6790		150 Watts
	Difference: 92 Watts (159%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6790 will be 315% quicker than the GeForce GT 220 GDDR3 in general, because of its higher bandwidth. (explain)

Radeon HD 6790		134400 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 102016 (315%)

Texel Rate

The Radeon HD 6790 will be quite a bit (more or less 236%) more effective at AF than the GeForce GT 220 GDDR3. (explain)

Radeon HD 6790		33600 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 23600 (236%)

Pixel Rate

The Radeon HD 6790 will be a lot (more or less 169%) better at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also will be able to handle higher resolutions more effectively. (explain)

Radeon HD 6790		13440 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 8440 (169%)

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 largest amount of information (measured in megabytes per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.