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What PSU Level?

post #1 of 11
Thread Starter 
Hi there...
Had a look at the FAQ about recommended power supplys...

My Question is what size of PSU do i need do power the system bellow with what connections...

building the PC is the easy part, its knowing what parts are needed is the tricky bit i have never come to grips with!

Q6600 - 2-4gb RAM
512mb 9800 GTX or £138-512MB HiS HD3870 Iceq3 Turbo
---
Abit IP35-V (Socket 775)
Gigabyte GA-P35-DS3L Intel P35 (Socket 775)
Abit IP35 (Socket 775)
Asus P5KC Combo Intel P35 (Socket 775)
DFI Lan Party DK P35-T2RS Intel P35 (Socket 775)
Abit IP35 Pro (Socket 775)
---
(do not worry, i already have another thread under intel asking what board is best to go for Versus the price!)
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post #2 of 11
your going to need atleast a 500W psu with rails of 20A. i would go for a Steal Xtream 600W from OCZ. Good Solid PSU.
    
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post #3 of 11
9800GTX needs 2x6pin. Board needs 4 pin or 8 pin. Based on the description, a good 500W should be fine. The $70 Corsair 550vx has all proper connectors for your rig.
post #4 of 11
Quote:
Originally Posted by usman_hussain1987 View Post
Steal Xtream 600W from OCZ.
Yet another OCZ product? Steal Xtream?
post #5 of 11
Thread Starter 
I am no expert...but the PSU's that have been named here are only suitable up to Dual core according to the reviews n stuff...

so far i have been looking at:
Akasa AK-P085FG-BK 850W PowerMax PSU
Corsair TX 750W ATX2.2 SLI Compliant PSU
Thermaltake ToughPower 850W Modular Power Supply
Antec Quattro 850W PSU
Coolermaster Real Power 850w Modular Power Supply



Whats better?! - Single 12v Rail or 4x 6x 12v Rail?!
I'm reading reviews that contradict each other...
"Single 12v rails supply 100% of the power...4x 12v Rail lose 30% of power...etc"

BUT all the high end PSU that are made for running SLi / Quad cores ALL appear to be using 4x 6x Rails?!...SO...whats the deal here?!

Single or Multi?!
I have read the other sticky that addresses this....but its reffering to dual core PSU's and stuff...
Edited by Valllldondo - 5/28/08 at 7:37am
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post #6 of 11
Quote:
Originally Posted by Valllldondo View Post
I am no expert...but the PSU's that have been named here are only suitable up to Dual core according to the reviews n stuff...

so far i have been looking at:
Akasa AK-P085FG-BK 850W PowerMax PSU
Thermaltake ToughPower 850W Modular Power Supply
Antec Quattro 850W PSU
Coolermaster Real Power 850w Modular Power Supply



Whats better?! - Single 12v Rail or 4x 6x 12v Rail?!
I'm reading reviews that contradict each other...
"Single 12v rails supply 100% of the power...4x 12v Rail lose 30% of power...etc"

BUT all the high end PSU that are made for running SLi / Quad cores ALL appear to be using 4x 6x Rails?!...SO...whats the deal here?!

Single or Multi?!
I have read the other sticky that addresses this....but its reffering to dual core PSU's and stuff...
Ya, that's a common misunderstanding. Maybe a year or so ago, the voltage loss across multiple Rails was pretty bad, and thus everyone said Single 12V Rails were the way to go. Same thing with modular power supplies, they lost a little amperage on their rails, and people wrote them off as crap. However, the good PSU makers have made great strides toward building higher quality Multi-Rail PSUs, and thus, those problems are often non-existent any more.

Now, as long as the PSU is built by a decent company (Seasonic, Silverstone, Corsair, PC Power & Cooling, Ultra, etc) it doesn't matter if it has Multiple or Single 12V Rails, or if it is modular or not. Well, modularity is a REALLY nice feature, but it won't negatively impact your performance or stability, like it may have in the past.
    
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post #7 of 11
Quote:
Originally Posted by Valllldondo View Post
I am no expert...but the PSU's that have been named here are only suitable up to Dual core according to the reviews n stuff...

so far i have been looking at:
Akasa AK-P085FG-BK 850W PowerMax PSU
Thermaltake ToughPower 850W Modular Power Supply
Antec Quattro 850W PSU
Coolermaster Real Power 850w Modular Power Supply



Whats better?! - Single 12v Rail or 4x 6x 12v Rail?!
I'm reading reviews that contradict each other...
"Single 12v rails supply 100% of the power...4x 12v Rail lose 30% of power...etc"

BUT all the high end PSU that are made for running SLi / Quad cores ALL appear to be using 4x 6x Rails?!...SO...whats the deal here?!

Single or Multi?!
I have read the other sticky that addresses this....but its reffering to dual core PSU's and stuff...
in general, single is better. if you want a good explanation, go to PC P&C website and see "PSU Myths exposed" link
(because I don't just want to basically repeat what they say, they explain it quite well)
HOWEVER, with that high amount of power (850W) and increasing build quality of computer PSU's in the past year, the loss is insignificant in scope to your needs.
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p
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post #8 of 11
Quote:
Originally Posted by jonnyGURU View Post
Yet another OCZ product? Steal Xtream?
Hopefully they stuck with Impervio!

Quote:
Originally Posted by Indian_Engineer View Post
in general, single is better. if you want a good explanation, go to PC P&C website and see "PSU Myths exposed" link
(because I don't just want to basically repeat what they say, they explain it quite well)
Please don't go there. The talking points on that list have been busted many times by jonnyGURU and if I get the time I will find his response. For the most part, single vs multi-rail is a non-issue. Each have there slight benefits but you should worry about getting a quality PSU first and foremost.

Now for power requirements. I would comfortably put a OCed quad and either of the gpus listed on a quality 550W psu like the Corsair linked earlier. 500W-600W is the butter zone and there are many options.
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post #9 of 11
Quote:
Originally Posted by linskingdom View Post
9800GTX needs 2x6pin. Board needs 4 pin or 8 pin. Based on the description, a good 500W should be fine. The $70 Corsair 550vx has all proper connectors for your rig.
+1
post #10 of 11
Quote:
Originally Posted by Valllldondo View Post
I'm reading reviews that contradict each other...
"Single 12v rails supply 100% of the power...4x 12v Rail lose 30% of power...etc"
Well, then that means someone is right and someone is wrong, correct?

Stick with review sites that actually know how a PSU works:

http://www.jonnyguru.com
http://www.hardocp.com
http://www.hardwarecanucks.com
http://www.hardwaresecrets.com
http://www.hardwarelogic.com
http://www.techpowerup.com

Doubt you'll find much contradiction with those guys.
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