PC BIOS vs UEFI BIOS

I have an ACER ASPIRE X1420 desktop with an AMD Athlon II X4 645 processor, running 64-bit Windows 7. It's a small form factor case with 2 SATA ports - 1 for the HD, 1 for an optical drive. The HD that came with the system is very small and I want to swap it out with a 3TB Seagate Barracuda. Now, I understand that 64-bit Win 7 should have no trouble recognizing the drive as a second drive, but in order for the drive to be bootable, the BIOS needs to be UEFI. And I don't know how to tell if my BIOS is UEFI or whether it is strictly Legacy. I can tell that it is American Megatrends Inc. P01-B4 11/04/2011. But that's about as far as I can go. Computer Management shows a SYSTEM RESERVED partition of 100MB that's Healthy (System, Active, Primary Partition). It does NOT say UEFI/EFI. Does anyone know if the BIOS is UEFI or strictly Legacy?

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finlux

Hi dzgaga!

Go to Computer Management, by left clicking "Computer" (either on your desktop or from the start menu) and select "Manage", followed by "Disk Management" Place the mouse over one of the system partition. It will display a little message. If it says "EFI System Partition" you have UEFI. If it doesn't then it is a standard BIOS.

Hope this helps!

dzgaga

Thanks. That's what I had assumed but wasn't 100% convinced. As in my orig posting my SYSTEM partition says Healthy (System, Active, Primary Partition.) Thanks for confirming my suspicion.