Disc write speeds and other internal components of the computer may limit speeds also. Some antivirus software may also limit speeds. Testing with a second Gigabit capable device is always useful to help determine the true speeds. The Speed test Technology has yet to catch up to Gigabit technology so the normal Ookla speed tests are not a reliable Gigabit speed test. The Digiweb Speed test is also based on the Ookla testing engine. Ireland currently has no Gigabit speed test servers.