Sufficient Wattage?

[RobH66]

Howdy!

I'm building my own PC for the first time. Since I don't know too well what I'm doing, I decided to crowdsource some of the decision making... and the following machine is what another forum came up with.

CPU: Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost)
GPU: EVGA GeForce GTX 560 Ti 1GB
Motherboard: ASRock P67 PRO3
PSU: XFX Core Edition PRO450W
RAM: G.SKILL Value Series 8GB (2 x 4GB)
Cooling: XIGMATEK Gaia
Case: COOLER MASTER HAF 912
HDD: SAMSUNG Spinpoint F3 1TB 7200 RPM
SSD: Intel 320 Series 80GB Internal Solid State Drive
DVD: LITE-ON DVD Burner

I placed the order for those parts over the weekend. But here's my problem... in the time since I've placed that order, I've been reading a bit more about everything I'll be doing and am starting to question whether or not that power supply will be sufficient for my needs. I asked the people who recommended it to me and they had this to say.

"Yes, the power supply is sufficient. It provides 34a on the 12v rail, the rail that powers the majority of components. A core i7 2600k uses roughly 7a and a GTX 560 Ti uses roughly 13a, both under load."

I took them at their word at first... but then a couple hours ago while posting my build at another forum, a friend suggested that the PSU was insufficient.

I don't know what I'm doing. And I don't know if any of these people know what they're doing. So I'm gonna ask you experts...

Do I need to send back this power supply when it shows up and buy a new one?

 

[fffblackmage]

You're fine.

450W is enough, and XFX means it's a quality Seasonic-made PSU.

 

[BoomerD]

IMO, you're pushing the limits of that 450 watt PSU, but it IS a very well made unit. Personally, I'd prefer 550 watts or more with that build, even though it's unlikely that you'll ever pull even 400 watts from the wall. (unless you push overclocking pretty hard)

 

[dualsmp]

You'll probably pull less than 300w (DC) so it's plenty. The test system for this graph uses an overclocked i7 920 so your going to use less than that.

 

[TemjinGold]

Based on how you listed your cpu, I'm guessing you don't plan on OCing at all? You aren't pushing the limits on anything. MY system below loads at about 300w from the wall.

 

[RobH66]

Based on how you listed your cpu, I'm guessing you don't plan on OCing at all? You aren't pushing the limits on anything. MY system below loads at about 300w from the wall.

Actually, I was debating going with a mild/moderate overclock. But I don't have any intention of trying to push it to the limits.

Thank you all for the responses I've received. I'll feel a lot better when things start showing up later today (hopefully).

 

[tomoyo]

Moderate overclock would be fine. Even a little bit of overvolting would stay quite a bit below the limits of the psu. To be honest, the real answer is that you are totally in the sweet spot of the psu. Getting more would be completely stupid unless you have specific silencing/oc/etc needs. Whoever said you didn't have enough power is totally full of crack.

 

[BrianTho2010]

You can push the CPU to 4.5Ghz and be fine. Sandybridge and current generation GPU's (other than the top end cards) are surprisingly power efficient.