Not enough power?

[Corey]

Hi,
Just a quick question I have a Silver stone 850 watt PSU with 2 graphic cards and when I try and over clock it just fails... I had my Processor over clocked to 4.5ghz when one of my graphic cards was getting work on it but now since adding the second one in I can't over clock at all... Is it because I lack power or something?

 

[seumasbeathan]

Well Unless you have 2 690's then 850w is more then enough for 2 cards

 

[Ru5ty_t00l]

a fully working 850 watted psu should handle the system easily

 

[Corey]

Then what could it be? It just doesn't work... If I take one card out then it works fine.

 

[Ru5ty_t00l]

specs please

 

[S_I_N]

psu could be faulty and not up to handling the load. If you have a spare one laying about try it with another psu

but yeah full specs would help us help you

 

[Corey]

Intel i5 2500k
2 Gigabyte Radeon 6950s
Gigabyte z68-Ud3h
6Gb Corsair DDR3 Ram
Corsair force GT SSD
Seagate 1tb storage drive

 

[jamesriley94]

Define 'when I overclock it just fails'

do you mean you get bluescreens or system cuts out or what?

 

[Corey]

The system like double boots and gives me an error saying the oc has failed...

 

[jamesriley94]

If it was a psu issue - the power would completely cut when the power supply failed. It wouldnt happen on boot. My guess is your overclocks are unstable...

 

[Corey]

I even tried using the SMART 6 program with my board which can do it for me but still nothing... I'm not sure why but after adding the extra card in it gave me a fail to boot.. So my guess was the power supply.

 

[seumasbeathan]

What is the overclock you are trying to do?

 

[Corey]

I am tryig to get around 4.1ghz, originally when I didn't have the second card in I was sitting stable at 4.5...

 

[airdeano]

Intel i5 2500k
2 Gigabyte Radeon 6950s
Gigabyte z68-Ud3h
6Gb Corsair DDR3 Ram
Corsair force GT SSD
Seagate 1tb storage drive

6GB RAM? huh? mount the RAM in paired pairs. diable on GPU power and retest.
the double boot can be an inference to the uneven RAM.

airdeano

 

[Corey]

6GB RAM? huh? mount the RAM in paired pairs. diable on GPU power and retest.
the double boot can be an inference to the uneven RAM.

airdeano

Ok, thanks i will try that tomorrow as i'm busy day... If it is uneven ram will i have to buy new ram or no?

 

[airdeano]

just pull 2GB.. and retest.

airdeano

 

[Corey]

That's still didn't work... Any other ideas?

 

[S_I_N]

some ideas here but imho its a psu issue even though its a 850watter dont mean its putting out 850 watts. Since you have no issues with a single card and this only happens with dual cards it has to be either a bad psu or possibly a faulty mobo. Try running single card in each slot. this may help rule out mobo issues