If you have a dual Bios card as smoolae suggested you could flip back to the stock bios and should have no problems. Equihash is going to use more power and thus produce more heat (since it uses the core moreso than Ethash). You either need to go to lower mem clocks or you'll just have to flash back to looser mem timings.
personally i just use eth settings, yeah its lower hash rate by say 5 to 10 percent
but also alot less power than the high stock cores of a stock card. If anything
i just lower the mem clock via software.