How many watts extra is needed for overclocking?

[Idontcare]

And water not necessary for oc to 4.5, even in tropical ambient right?

Water is not necessary for 4.5GHz. But really good air cooling is. (unless you delid, then you can use pretty crappy air cooling and still get 4.5GHz)

 

[thetrystero]

Water is not necessary for 4.5GHz. But really good air cooling is. (unless you delid, then you can use pretty crappy air cooling and still get 4.5GHz)

Ok, i'll report back on high I get with my air coolers. Delidding sounds a very tempting prospect. I hope to reach that level of mastery in future

 

[thetrystero]

As I understand it, even after ocing the processor will not run at that max clock speed all the time is that right? The cpu is intelligent enough to determine demand by lowering clock speed and hence power consumption commensurate with requirements but also can ramp it up as needed, up to the max speed of oc, is that right?

 

[jvroig]

As I understand it, even after ocing the processor will not run at that max clock speed all the time is that right? The cpu is intelligent enough to determine demand by lowering clock speed and hence power consumption commensurate with requirements but also can ramp it up as needed, up to the max speed of oc, is that right?

Yes, as long as you leave EIST enabled.

 

[Concillian]

No extra gpu, just the one evga gtx650

Realistically, you can run fine on something like this:

http://www.newegg.com/Product/Produc...easonic%20360w

You don't need as much headroom as you think. I have a CPU OCed to 4.0GHz and a 7850 overclocked to 1150 MHz, a HDD and a SSD and If I load up my system, my Kill-a-watt reads ~250w. In normal gameplay I'm usually under 200W. Actual usage is well under what you'll see in reviews, where systems are stressed TO THE MAX they can possibly be.

If you need headroom, sure 400-450. 650+ watt PSUs are overkill for just about anyone with a single GPU.