I have very old i5 laptop (puchased in 2011), it was performing fine when i used to play on Warmane - Cataclysm(Neltharion).
But it heats a lot on Wotlk(icecrown) lowest possible video setting. Can it be because of wotlk client (with WoD model) ?
Will downloading old wotlk client solve the issue ?

