Safe to O.C.?

[dasr1985]

Safe to O.C. My 2500k to 4.5ghz again since I've added another MSI PE 660ti? Running a corsair 80 plus gold 750/750. MSI Z77A-GD65, 2500k, dual 660ti MSI power editions... Not sure if that's all that matters for now but wondering if its safe to turn my O.C. Back on with the addition of the 2nd graphics card? Will my power supply be strained at a 4.5ghz OC or will it be just fine?

I need to save up for an UPS with a watt meter I know, lol.

[xxbrock88]

Yes, you should be able to use your overclock. 750w should be enough to power your system. The Kepler GPU is very power efficient and Corsair makes good quality PSUs. I think that it will be just fine using your overclock.

Also you can check this website to calculate how much wattage your system will use:

http://www.extreme.outervision.com/psucalculatorlite.jsp

Hopefully this was helpful. :)

[Theo]

Just watch out for temps since a second gpu might raise them a bit in the case, specially when all components are under load

[dasr1985]

Yeah temps were an issue for the top GPU. I added two extra fans to help, since then the top gpu never passes 63C. My CPU is cooled by the h100i and at 4.5ghz on prime it never passes 59C.

[dasr1985]

And btw thanks for the great info and the helpful site tool I'm gonna check that out for sure!!

[christoi]

Don't worry about it, it's perfectly fine. Unless you are adding a crazy amount of voltage to the chip, power consumption isn't going to change that much from a moderate overclock like that. With a dual-card setup the power consumption of the individual cards tend to be lower anyways, because they aren't running at as high of a load level in most cases. During gaming load, I'd presume your rig would be pulling ~350w at most.

[xxbrock88]

And btw thanks for the great info and the helpful site tool I'm gonna check that out for sure!!

Your welcome :)

[dasr1985]

Ah ok, that's def modest to what a lot tend to "e-quote" lol

[dasr1985]

The estimate tool puts me at about 500W at max load so pretty decent