Sapphire 7870 OCing?

[ndslite]

So I got my 7870. It has a Deafault voltage of 1.25!!! Pretty high, but Sapphire said its fine. So, without raising the voltage, I OCed it to 1150 on the core and 5250 on the Memory. Will this shorten the lifespan of my GPU significantly?

 

[djangoringo]

No, it's fine.