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How many watts?

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October 18, 2009 5:04:10 PM

Hi all,

I'm putting a new build together, and I need a little help with figuring out how big of a PSU I need.

Theese are the specs:

Chasis: Cooler Master HAF 932
Motherboard: ASUS Rampage II Extreme Republic of Gamers
CPU: INTEL CORE I7 920 2.66GHZ 8MB
CPU Cooler: Noctua NH-U12P Special Edition 1366
RAM: 2x CORSAIR 6GB DDR3 XMS3 DOMINATOR PC12800 1600MHZ
Graphics: ASUS ENGTX280/HTDP/1G *
HDD: 1x WD CAVIAR BLUE WD3200AAKS + 1x WD CAVIAR BLUE WD5000AAKS
Optical Drive: 1x NEC ND-3550A

* = Will be upgraded as soon as Nvidia release their GT300 series GPU..

I'm pretty set on getting a PSU from Corsairs HX series, but as mentioned I don't know how much power I will be needing..

Please help? :D 

More about : watts

a c 139 ) Power supply
October 18, 2009 5:19:56 PM

Looking to SLI a pair of top end GT3xx video cards?
October 18, 2009 5:45:28 PM

No no, just a single high-end GT3xx ;) 
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October 18, 2009 5:48:44 PM

As of now, we dont have any idea how much power those high end GT300 video cards will require.
Since ATI made their 5870 a bit greener chances are, Nvidia would surely step on that same greener
path, not just to compete with the Big Bad Rads but for the sake of a more greener computing in general.

You'll be upgrading soon to a very high end GT300 series video card right?
For a more future proof set up. An 850 watt psu will surely handle all your
gaming rig needs including two very high end gpu's running on crossfireX mode or SLI.

You mentioned Corsair HX series psu, i recommend this:
http://www.corsair.com/products/hx850/default.aspx


-- Or, if you really made up your mind and promised your self to only use a single very high end GT300 video card
This one would be your best choice (since your eying on a Corsair brand).
http://www.corsair.com/products/hx750/default.aspx
a c 139 ) Power supply
October 18, 2009 6:21:13 PM

The 520HX would be a safe bet for the single GTX 280.
Since you're looking at the GTX3xx and we're just guessing I'm going to say look at the 620HX or 650HX.
a b ) Power supply
October 18, 2009 7:45:59 PM

very similar thread to mine it seems!

650HX gives you some headroom even with the GTX300s coming out (probably lol)

For now, I wouldn't get a GTX280 - either get a GTX285 because they're a touch cooler and greener (no NVIDIA pun intended) or if you're planning on upgrading so soon save some cash and get a GTX275 or Radeon 5850
a c 248 ) Power supply
October 18, 2009 11:26:42 PM

Currently there are no known power supply recommendations for a system with a GTX 3XX series video card. The cards are not available for review and are not for sale. Any comment would be pure speculation. Can you wait until the cards are available?

The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the 12 volt rail(s) can easily power a system with any single video card made. A high quality 700 to 750 watt power supply with sufficient current (amps) on the 12 volt rail(s) can power a system with two video cards operating in dual mode. There are a few exceptions like the new ATI Radeon HD 5XXX series cards which use less power due to their energy efficiency.

Before purchasing a new psu you will need to decide whether you will eventually have a pc with one or two video cards.

Corsair, PC Power & Cooling, and Seasonic are some of the brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Lately we've been seeing a few other brands offering some high quality units.
October 19, 2009 6:14:51 AM

Quote:
For now, I wouldn't get a GTX280 - either get a GTX285 because they're a touch cooler and greener (no NVIDIA pun intended) or if you're planning on upgrading so soon save some cash and get a GTX275 or Radeon 5850


I already own the GTX280, that's why I won't get a new card untill the GT300 is out :) 

Quote:
Before purchasing a new psu you will need to decide whether you will eventually have a pc with one or two video cards.


I want a one-card setup. No need to go SLI :) 

Quote:
A high quality 700 to 750 watt power supply with sufficient current (amps) on the 12 volt rail(s) can power a system with two video cards operating in dual mode.


So, a 750W PSU should easily be able to run my entire setup?
a c 139 ) Power supply
October 19, 2009 6:29:00 AM

Yes;
But then so will a good quality 550W PSU.
Quote:
The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the 12 volt rail(s) can easily power a system with any single video card made.

October 19, 2009 7:16:11 AM

How about if I overclock the CPU? Would the HX620W be enough then, or doesn't it change anything?
a b ) Power supply
October 19, 2009 7:37:09 AM

With single top end card 620HX will be able to power the rig.
October 19, 2009 9:32:48 AM

shubham1401 said:
With single top end card 620HX will be able to power the rig.


Even if I overclock the CPU? (I've never tried overclocking before, so please bear with me if it's a stupid question.)
a b ) Power supply
October 19, 2009 10:00:48 AM

Yes It will handle the load even if the CPU is overclocked...
October 19, 2009 10:07:23 AM

shubham1401 said:
Yes It will handle the load even if the CPU is overclocked...


Thanks man! :) 

I'm going with the HX620W then.. Thanks for all the answers guys, I really appreciate it :) 
October 19, 2009 11:19:39 AM

don't know what you are doing but 12GB of RAM in combination with caviar blues? at least get caviar black or SSD since you seem to be able to afford it.
October 19, 2009 11:28:57 AM

stumpystumped said:
don't know what you are doing but 12GB of RAM in combination with caviar blues? at least get caviar black or SSD since you seem to be able to afford it.


How do harddrives affect RAM or vice versa?

The reason I intend on using BLUE and not BLACK is that I already own them, and SSD's are waaaay to expensive at the moment. So to save some money to put elsewhere, I decided I would just keep my BLUE's :) 
a b ) Power supply
October 19, 2009 12:00:56 PM

12GB are waste of money for general tasks.

6GB will suffice...
October 19, 2009 12:30:39 PM

shubham1401 said:
12GB are waste of money for general tasks.

6GB will suffice...


Perhaps, but it has to improve overall system performance and somewhat future proof the system. I know a SSD would do that too, but since they price as they do, I can wait..

But you might be right, I'll go for a single 6gb pack to start with, thanks :) 
!