Hyperdrive

Hyperdrives are devices which can propel spaceships to hyperspace, by opening a subspace window and travelling within a hyperspace field. Hyperdrives vary from culture to culture.

Ancient hyperdrives
The Ancients possessed two types of hyperdrives: interagalactic hyperdrives and galactic hyperdrives. The former was capable of allowing Ancient vessels to make trips between Galaxies, but they appear to have been confined to certain vessels, such as city ships. The galactic hyperdrives were able to traverse a galaxy at a slower pace, but were still very fast.

Asgard
Asgard hyperdrives are among the fastest encountered, being able to traverse galaxies within minutes. While in hyperspace, they cannot use their weapons or defensive shields, and can be destroyed if a vessel in hyperspace near them self destructs. If the ship is towing a vessel in their hyperspace field, the trip is lengthed to several hours.

Goa'uld
Goa'uld hyperdrives on the standard ha'tak are capable of reaching speeds of 32,000 times the speed of light. However, because of the far-flung nature of the Goa'uld Empire, Goa'uld homeworlds had to be within less than a years reach of a planet designated for conquest.

Wraith
Wraith hyperdrives are believed to have been stolen from the Ancients, as Ancient hyperdrives are compatible with Wraith hyperdrives. Because of the techno-organic nature of Wraith hive ships, they must go in and out of hyperspace to prevent damage from radiation acquired from hyperspace travel.

Ori
Ori hyperdrives appear to be galactic only hyperdrives, as they required a Supergate to reach the Milky Way. However, the hyperdrives still appear to be fast enough to traverse the galaxy in short periods.