Our markets are full of H81 boards which only come with 2 DIMM slots.
You need to find a board with either Z87 or Z97 chipset. You can either search these boards on OLX or just go to the local market and ask around for Z Series boards. They'll cost MUCH more than those H81s, though. I'm talking about 7,000+, whereas H81 boards from reputed brands (Asus, Gigabyte, MSI etc) go for just 2.5k.
Hope it helps.