let me see if i can rephrase this.

Right now my core clock is 820mhz.....my memory clock is 1800mhz my VOLTAGE is at 1.050 that is stable. If i try a clock like for examble 850mhz with a 1830mhz memory clock at 1.050 voltage it artifacts and dosent work all that well. NOW when i try RAISING my voltage to 1.060 and run a benchmark my computer will shut down. Could my psu be the reason for the shutdowns?......

Need to figure this out. thanks

It could very well be your PSU can't handle the load on the 12v rail.  If it can't i't wil shut down.  It could also be that your card can't handle the voltages or it could even be overheating.

Unless you're getting very high temperatures while benching, it sure sounds like a PSU shutting down.  Use a multimeter on the psu to see if the 12v. is running in or out of spec.  What brand is the psu?
 
Moving to the 400 series forum.

It indeed does sound like a PSU issue. One rule of thumb in PC building: Never cheap out on the power supply. It's the single most important component in your PC. Everything in your PC relies on it and nothing works without it. If you're looking to cut costs on your build, don't do it on your power supply.
 
750w PSU should be more than enough to power your system if it were from a quality manufacturer. It sounds as though you're possibly overloading the 12v rail that your GTX470 is on with that PSU you currently own. I would highly suggest you get a higher quality PSU for your PC. Get something from Antec, Silverstone, Corsair, PC Power and Cooling or Seasonic in the 700w + range and you should be fine. Think about getting a 850w or better if you plan on going SLI down the road.

General Iroh

I know it's the not the most reliable source, but check your 12v rails in the bios. If its low (like 11.75 or 11.65) then maybe your PSU is the problem. Do you have a second PSU u can borrow from a friend so you can trouble shoot?

Where do i check that in my bios? 0_o

CraptacularOne

silverstenislife

mmmmmmm heres the thing......im still using the oringal psu i got when i first bought a computer.....which was a dell....this psu comes straight out of an xps 630i >-< but according to the back it has 18amps on my 12v rails which i think i have two......i hate power supply's so am not very good at the specs what i could of said might have been entirely wrong, but it looks right>_<

Get rid of it. And and under powered unit and it's rating of 750w is not "continuous" and is only a peak rating. Moreover it is old and as capacitors age, they are no longer capable of sustaining the load they once were. And lastly, it does not use high quality parts in the PSU.

What he said
 
and don't overclock the mem clock that is a sensitive bit

+1 to craptacular
 
Get rid of it, it didn't use quality parts from the get go and has only degraded with time.  
 
I would recommend a PSU like this:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817207003
 
Good price, high efficiency, modular, and a strong single 12v rail.

I've had Dell XPS 630 and those PSU's are hit and miss.  Some units seem to be decent and others...not so much.  Plus you have a decent overclock to boot on your cp., I'd upgrade the psu...If you want power, here you go:
 
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139014
 
my 2c.
 
budd

CraptacularOne

Here's a Antec 750w for $69 after rebate. It's about the cheapest you are going to get.

http://www.newegg.com/Pro...x?Item=N82E16817371026

That's a great little psu. I have one over a year old now powering a folding rig with two GTX 465's core clocked at 850Mhz with the full Afterburner voltages and not a hiccup out of that system.
 

My company buys Dell computers..., and we've had many PSU failures, even though we're buying the so-called 'commercial quality', heavy-use models.
 
Every time we have a power failure, which happens a few times a year, it's a given that a certain number of the computers are not going to come back to life when the power comes back on.
 
The worst cases are where we have computers in warm areas.  Heat really seems to age them!
 
I think Dell really skimps on the PSU's.  They are also famous for using a non-standard or proprietary PSU, which may have a shape or screw hole pattern that makes it difficult to replace with anything other than another Dell part.
 
(My company was bought by Honeywell a few years ago, and they force us to buy only from their list of preferred suppliers.  For computers, it's Dell, otherwise we'd never buy another one of them.  Perhaps their regular consumer line is better, but the ones they buy for us are pretty much crap!)

Nice posts, everyone.

silverstenislife

I just looked at that in my bios it fluctuated between 12.04 and 11.96

That isn't unusual, it's only .08 volts. The ATX spec is from 11.4 to 12.6. Either your PSU is too weak for the OC or you've reached the OC limits on your card. Either way, I'd reduce your clocks to 750-775 or so until you can get a better PSU. You'd hate to start with the makings of a decent system only to blow it all up with a cheap PSU.

One more thing... are you on stock cooling?
 
if so.. why are you going 1.087 volts?  Thats a stupid idea on stock cooling.
 
IF your aftermarket ignore my comment.

CraptacularOne

It indeed does sound like a PSU issue. One rule of thumb in PC building: Never cheap out on the power supply. It's the single most important component in your PC. Everything in your PC relies on it and nothing works without it. If you're looking to cut costs on your build, don't do it on your power supply.

 
+1 about the power supply.
 
Also the motherboard is very important, cheaping out on that can cause problems as well. Some of my systems I had in the past wouldn't run the CPU and Ram at the proper speeds even at stock. I learned the hard way =/
 
my i7 is the first Great Quality build I ever done.