600W suffice?

[Saul]

Hey all,
I've just recently upgraded my graphics card + hard-drive. Here's my spec for before the upgrade:
Asus P5K Premium
Q6600 overclocked to 3.6GHz
XFX 8800GT Alpha Dog Edition
2 * Samsung Spinpoint-T 500GB
OCZ StealthXStream 600W

New spec:
Asus P5K Premium
Q6600 (no overclock, very unstable at 3.6GHz, why is this?!)
Asus 4870X2 (tri-fan one)
1 * Seagate Barracuda 7200.12 1TB
OCZ StealthXStream 600W

For some reason, the system is very unstable (crashes, blue screens, etc.) with my overclock set to 3.6GHz. I need to investigate this, but it may have something to do with me having to remove a fan from my case Antec P182 due to the huge graphics card. Does anyone have any ideas?

Also, I'm extremely worried that I don't have enough power for the huge graphics card. My PSU comes with 2 * 3-pin PCI-E connectors and a hell of a lot of molex. The graphics card requires a 4-pin PCI-E connector (with an adaptor from 2 * 3-pin PCI-E connectors) and another 3-pin PCI-E connector (with an adaptor from 2 * molex). I'm currently using both adaptors for the power supply, is my power supply suffice for hard-core gaming without issues (Crysis, most modern games)?

Sorry for nagging a lot
Thanks in advance,
- Saul.

 

[Venares]

It does indeed sound like your PSU may be right on the edge of stability there.

 

[RJC]

Does your psu not have PCI-E cables for the gpu, ie 1 x 6 pin and 1 x 8 pin.

Your psu should be enough as I am running a I7 system on a 620w psu with the XFX 4870X2.

Is your system stable with your cpu and memory running at stock.

 

[Saul]

Does your psu not have PCI-E cables for the gpu, ie 1 x 6 pin and 1 x 8 pin.

Your psu should be enough as I am running a I7 system on a 620w psu with the XFX 4870X2.

Is your system stable with your cpu and memory running at stock.

Just two 6 pin ones. I'll have a look later, but I think I'm right. According to CustomPC their test PC only consumed 521W under full load on a quad core extreme.

Also my PC is fine running at stock, I just want to overclocker to 3.4 atleast.

 

[ArcAneTSGK]

I reccommend the TX650W by Corsair, reliability and performance, and 5 years of warranty.

comes with 2XPCI-E 6 pin, (Each with a +2 pin if any 8pin cards) and lots of molex, sata power, floppy power, 20+4pin mobo, 8pin mobo/cpu (can be 4pin)

if you think you may crossfire, the 750W comes with 4x PCI-E 6 pin.

 

[Sasahara]

The overclock could be overloading one of the Faux +12v rails, have you tried a different combination of molex for the 6 pin pci-e adaptor?

Are the temps of your CPU and mobo a lot higher now, the 4870X2 may heat up the case?

Have you removed the central HDD tray, I'm trying to work out what fan you had to remove, as even the 4870X2 shouldn't be long enough to hit the central fan in a P182.

 

[Saul]

It does indeed sound like your PSU may be right on the edge of stability there.

I couldn't really understand how though, my PSU is supposedly 700W (see below) and according to OC it is SLI ready, presumably meaning it supports two graphics card (i.e. 4870X2)

I reccommend the TX650W by Corsair, reliability and performance, and 5 years of warranty.

My power supply (OCZ StealthXStream 600W) has the exact same components of the OCZ GameXStream 700W power supply, according to many reviews. I think I might be OK on the power front. I'll buy this power supply for my upgrade at Christmas. Thanks for the heads up

The overclock could be overloading one of the Faux +12v rails

Indeed it could! At the moment I've got my two old hard-drives and my new one in, I still need to remove the old two (currently copying the data over), so that will free up some precious power.

have you tried a different combination of molex for the 6 pin pci-e adaptor?

I'll try the different combination tomorrow. Here is a better explanation of my overclocking issue:
First boot, motherboard complains that Overclocking failed, press F1 for Setup, press F2 to Continue (at stock speeds). I got onto BIOS and reduced my VCORE to 1.2V (I think) from 1.4 (I think). This allowed it to boot but very unstable, so I sacked the whole overclocking off because I didn't have time to faff about with overclocking.

Are the temps of your CPU and mobo a lot higher now, the 4870X2 may heat up the case?

The 4870X2 shouldn't heat the case up that much when Vista is simply loading the desktop. I think my overheating (if present) may have something to do with me now sucking air into the CPU heatsink instead of sucking it out of the heatsink (Picture tomorrow).

Have you removed the central HDD tray, I'm trying to work out what fan you had to remove, as even the 4870X2 shouldn't be long enough to hit the central fan in a P182.

The graphics card hit the EXTRA fan I had on the central HDD, at present there's about 1cm until the graphics card will hit the central HDD cage, it definately hits it on it's way in (Once again, picture tomorrow)

Thanks for the replies everyone, just updated this post as I was originally posting from my iPhone.
- Saul.