After pulling out the bill of this thing I found out that it's a Lenovo K220 Ideacentre (5358/3FQ)
And here are the specs I could pull from the internet after looking it up.
Intel® Core 2 Duo Processor E7400,
2GB,
500GB 7200RPM S-ATA HDD,
no diskette drive,
PCI/PCIe Tower (4x4),
Intel...