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Buildinga system, what PSU?

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May 8, 2011 2:39:07 PM

Hey guys, sorry if this seems to be in the wrong place.

I am building a new system, and i wanted to know what PSU im going to need?

Mobo: Asus P6T Deluxe
Hardware: 1 CD/DVD RW Drive
1 Nvidia GeForce 240 (This needs 300W on its own, according to the box.)
1 Intel Core i7 Processor + Head Sink
3 Fans
2 SAS Hard Disks
* Basics (Internal USB's, etc.)
Other:
1 CRT Monitor
1 Basic speaker system (2 speakers, 1 subwoofer)
1x External HDD (Always connected.)

If i've missed anything then let me know, im ESTIMATING i need a 900W PSU?

-Thanks.

More about : buildinga system psu

a c 243 ) Power supply
May 8, 2011 2:45:44 PM

user1690 said:
Hey guys, sorry if this seems to be in the wrong place.

I am building a new system, and i wanted to know what PSU im going to need?

Mobo: Asus P6T Deluxe
Hardware: 1 CD/DVD RW Drive
1 Nvidia GeForce 240 (This needs 300W on its own, according to the box.)
1 Intel Core i7 Processor + Head Sink
3 Fans
2 SAS Hard Disks
* Basics (Internal USB's, etc.)
Other:
1 CRT Monitor
1 Basic speaker system (2 speakers, 1 subwoofer)
1x External HDD (Always connected.)

If i've missed anything then let me know, im ESTIMATING i need a 900W PSU?

-Thanks.

Nah, they reccomend that you put the card in a system with at least a 300 watt psu.
http://www.newegg.com/Shopping/ShoppingItem.aspx?ItemLi...
May 8, 2011 2:47:37 PM

I don't think 900W is what you want. I have a GT 240 (assuming that is the graphics card you meant by just saying 240) too and it runs fine on 400W. 500-550W is probably the target you are looking for thanks to the Core i7 processor. I would recommend the Corsair VX550.
Related resources
a c 104 ) Power supply
May 8, 2011 2:50:17 PM

http://www.thermaltake.outervision.com/

'build' your system into this and it will give you a good guide of your needs
the good thing is you can allow for any upgrades you might plan,
like will you need a new psu if you add another graphics card? etc,
Moto
May 8, 2011 2:59:36 PM

Edit: Didnt see the message above, entered the info i needed.

The thermaltake site indicates i needed a 748W PSU, so 700W isnt enough, so what would anyone recommend?
750W perhaps?
a c 104 ) Power supply
May 8, 2011 3:04:13 PM

The system will only draw what it needs to,
if you have a 700w psu and the system only needs 460w, it will only pull that from the wall, but obviously the psu is capable of supplying 700w
(bearing in mind ofc efficency and quality of the psu)
its always better to leave yourself at least a little headroom, it allows for efficiency drop as time goes by
Moto
May 8, 2011 3:21:25 PM

Ok, i see what your getting at there, hmm, if i need to leave some room to account for aging/etc... then i might just get an 800W PSU, since the thermaltake website indicates i need a 748W.

Sound like a good idea?
a c 243 ) Power supply
May 8, 2011 3:24:36 PM

user1690 said:
Edit: Didnt see the message above, entered the info i needed.

The thermaltake site indicates i needed a 748W PSU, so 700W isnt enough, so what would anyone recommend?
750W perhaps?

You did something out of the ordinary when inputting your components.

Mobo: Asus P6X58D Premium
Hardware: 1 CD/DVD RW Drive
1 Nvidia GeForce GTX460 1GB OC
1 Intel Core i7-930 OC'd to 3.8 + LC Pump
6 Fans
2 Sata Hard Disks
* Basics (Internal USB's, etc.)
Even adding the dreaded capacitor aging ( 25% ) that calc. says 573 for my system.


May 8, 2011 3:26:37 PM

Hmm, i will go over what i entered for my system and report back :S
May 8, 2011 3:36:57 PM

Interesting, re-entered the info i needed and now it says 366W

Obviously i may be getting something wrong, since (According to the info here, and elsewhere) the system will only draw the amount of power it needs, i might just get a 700W to be on the safe side. Gosh, never thought this would be so confusing (to me anyway.)

May 8, 2011 4:06:07 PM

Hi,

That system probably wont even top the 300 watt, any ''quality'' psu from 400 and up are more then fine. (corsair, antec , seasonic, delta and a few more)

However if you'd ever want to change the gpu you could take that into consideration thus getting a ''beefier'' psu 500-600 watt.

700, let alone 900 watts psu, would be total overkill.
May 8, 2011 7:02:35 PM

ill b ben said:
Hi,

That system probably wont even top the 300 watt, any ''quality'' psu from 400 and up are more then fine. (corsair, antec , seasonic, delta and a few more)

However if you'd ever want to change the gpu you could take that into consideration thus getting a ''beefier'' psu 500-600 watt.

700, let alone 900 watts psu, would be total overkill.


Ok, i got a spare PSU here, heres what it says on it:

FOR PENTIUM IV (Does that matter? :S )

+3.3V&+5V Total Output: 200W
+3.3V,+5V&12V Total Output: 500W

Its a Levicom ATX Power Supply Unit.

Just thought i'd ask before i go hunting for a new one. :) 
May 9, 2011 12:06:19 PM

user1690 said:
Ok, i got a spare PSU here, heres what it says on it:

FOR PENTIUM IV (Does that matter? :S )

+3.3V&+5V Total Output: 200W
+3.3V,+5V&12V Total Output: 500W

Its a Levicom ATX Power Supply Unit.

Just thought i'd ask before i go hunting for a new one. :) 



No that doesn't rly matter, although its a big tell that its an outdated psu. Old psu used to have most of there wattage on the 5v rails, which powers the hd's etc. these days those components are only marginal compared to the cpu and gpu strain on the psu.

So, it does look a bit better then the other one, but seeing as it doesn't show the amount of ampere on the 12v rail it wont be a lot more.

In short, again I'd continue looking for a reasonable priced psu's from ''A'' brands.

May 9, 2011 3:42:51 PM

ill b ben said:
No that doesn't rly matter, although its a big tell that its an outdated psu. Old psu used to have most of there wattage on the 5v rails, which powers the hd's etc. these days those components are only marginal compared to the cpu and gpu strain on the psu.

So, it does look a bit better then the other one, but seeing as it doesn't show the amount of ampere on the 12v rail it wont be a lot more.

In short, again I'd continue looking for a reasonable priced psu's from ''A'' brands.


Alright, i will go looking for a newer PSU.

HOWEVER, is this PSU usable with the specs i mentioned? Of course i will get a newer PSU but im just curious is all, i thought i'd ask, rather than let curiosity get the better of me. Because the PSU is the last thing im buying.
a c 76 ) Power supply
May 9, 2011 3:55:21 PM

The PSU is at the very heart of the system. Get the best you can.
a c 243 ) Power supply
May 9, 2011 3:58:58 PM

user1690 said:
Alright, i will go looking for a newer PSU.

HOWEVER, is this PSU usable with the specs i mentioned? Of course i will get a newer PSU but im just curious is all, i thought i'd ask, rather than let curiosity get the better of me. Because the PSU is the last thing im buying.

No.
Notice how ill_b_ben said to look for an "A" brand power supply ?
That Levicom is such a pos that it wouldn't be graded, there isn't a chance that it could output what it's rated for.
May 9, 2011 4:01:41 PM

Alright, i will go get a 500W since the thermaltake website indicated i need a PSU within the range of 400 (394 to be exact since i re-entered info.).

Unless anyone else has anymore info i am missing?
a c 243 ) Power supply
May 9, 2011 4:26:58 PM

You want a psu with 30 amps or more on the 12v, and it doesn't need to be 500 watts to accomplish this.
If the psu label doesn't tell you the power available to the 12v rail/rails, don't give it a second thought. Example;
May 9, 2011 4:32:54 PM

^Exactly,

A little ''test'' i tend to do is simply check the amps on the 12v rail, and then do it times 12. For example the psu delluser posted, this one has a total of 34a on the 12v rail. 34x12= 408.

The psu is rated for 430 watts, and most of it is going to the 12v rail, that alone is generally a sign of a good psu.
May 9, 2011 5:34:20 PM

Ok, before i get all confused about all this, i got 1 simple request, can anyone link me to a PSU i can get in the UK (Either online, or locally from PCWorld, etc...)

I would prefer getting a link from you guys because its clear you know what would be best for me, whereas i donot, and i dont want to go buy a PSU, and have it either A.) Damage the system or B.) Not work at all.

-Thanks for all the info guys.
May 9, 2011 5:43:33 PM

Alright great, thanks.

Will purchase this when i got the rest of my PC hardware/components. ;) 
a c 104 ) Power supply
May 9, 2011 5:44:17 PM

np man, sorry I've delayed in finding you a link :) 
Moto
May 9, 2011 5:46:24 PM

Nah its fine, thanks again though, cant wait to get my system up and running :D 
May 9, 2011 6:06:48 PM

Hear hear,

that one should do just fine.

Gl with future pc ''builds'' etc.
!