It's an 80GB Hitachi Travelstar HTS541080G9AT00 ATA Device. Speccy misreports the size of my drive: Model Capacity For This Specific Drive: 800GB. Partitions are reporting correctly, however.
I'm guessing Speccy hasn't divided by 1,000,000 properly to convert bytes into gigabytes.
If you start up a Command Prompt, type in wmic and hit Enter.
then type the command volume get driveletter, drivetype, capacity and hit Enter.
I suspect that will be the place Speccy gets the info from and maybe they no longer cater for such small drives and the decimal point is out of whack.