I built this PC a while back for my kids but they aren't interested in music production!
It has a Gigabyte Motherboard, Intel Pentium D Dual core 3.2GHz processor, 4GB RAM, A Xilence 480W power supply, Zalman CPU cooler and Quiet PC case fans which means the PC is much quieter than your normal PC, great for music production.
The Windows 10 installation is on a 500GB SATA drive 7200rpm
The other two drives are 120GB 7200 RPM SATA and a 500GB IDE 7200 RPM.
Fresh install of Windows 10 on the 500Gb SATA drive.
8 USB ports including 2 on the case at the front.
Lite-on DVD/RW drive - regarded as best for burning CDs
Also has a wifi pci card fitted.