If you look closely at the bottom right of the board (near the front panel connectors), you might see an unlabeled set of pins.
While it is a legacy board, you can still maximize its performance with specific components. ms-7613 ver 1.1 motherboard manual
MS-7613 (Iona-GL8E) Motherboard Specifications | PDF - Scribd If you look closely at the bottom right
: Works with Intel Core i7-8xx, i5-7xx, i5-6xx, and i3-5xx series. Note that it generally supports a maximum processor core frequency of 2.93GHz or less. Memory (RAM) : Type : DDR3 (240-pin) Non-ECC, unbuffered. Slots : 4 DIMM slots supporting dual-channel architecture. Speed : PC3-10600 (DDR3-1333) or PC3-8500 (DDR3-1066). ms-7613 ver 1.1 motherboard manual