ASUS Atlas 550W PSU is Good for 8800GTX

[bigspin]

I'm from sri lanka and asus psu is the only choice for us.Otherwise i have to specially order PSU from my IT shop and it will cost $100 more for 650W PSU($150 PSU+ $100 for special order)

Here is my rig....

C2D E6600 @ 3.2Ghz 1.4v
ASUS P5B-E Delux(MCH 1.4v/FSB 1.4v)
4 x 1GB Kingston HyperX @ 2.2v
2 x 250 Hitachi SATA
2 x ASUS DVD RW
ASUS 8800GTX or GTS
2 x 120mm FANS(2500RPM)
2 X 92mm FANS(2800RPM)
ASUS SilentKnight CPU Cooler
2 PCI CARDS(Sound & TV)

So what do you think, Can I buy 8800GTS or GTX card?

(I'm not going to keep my system more than 1 1/2 years and i'm working with this rig 24*7)

 

[yourmothersanastronaut]

Well, it'll probably be ok if you get the GTS, but most likely not the GTX. For the GTX, you'd want to special-order a higher-end unit.

 

[doolittle]

First, check out this review it's rated for +12v@30a combined and handled the max rating of 36a on the tester, not many units are capable of that. So it is properly rated 8)

I guesstimated your setup (8800GTX, OC and all) for +12v@24A worst-case, which is at the 80% mark of the rated +12v power... it should work without a hitch.

 

[bigspin]

First, check out this review it's rated for +12v@30a combined and handled the max rating of 36a on the tester, not many units are capable of that. So it is properly rated 8)

I guesstimated your setup (8800GTX, OC and all) for +12v@24A worst-case, which is at the 80% mark of the rated +12v power... it should work without a hitch.

ThnX Dude...Nice review of ASUS 550W.Reviewer said it is very good on load so i can save $100 ..Yep!!! I'm going to buy GTX (coZ I wonna play crysis @ smooth frame rate)

 

[Track]

His system will take AT LEAST 30A.

That PSU is cutting it close!

 

[bigspin]

You are right dude,but i can't spend xtra $100 for 650W PSU.

 

[doolittle]

His system will take AT LEAST 30A.

I have found the psucalc to be overestimating compared to real world values, not every component is going to be running 100% - would you really burn 2 dvd's when gaming? 1xdvd is fine. 4 fans at medium speed ~= 2 x full speed fans in the calc. I got +12v@24.8A and rounded down since the CPU's TDP is a bit high for the E6600.

Another example, this system @ techreports, an X6800/8800gtx/1xhdd/2gb system that clocked in at 187w idle / 277w under load measured at the outlet so if we assume an 85% efficient PSU (the worst case) that is 159w idle / 235w under load on the DC side. PSU calc says 281w recommended power supply wattage, or 330w @ 85% efficiency. That's a bit high IMO.

My own PC clock in at +12v@33A when I plug in all the values - in theory my TPII-480 is running 100%
maybe one day I'll gather the numbers from my kill-a-watt, some DC ammeter measurements and post it. In all honesty I have not given it a second thought - I would be suprised if it is over +12v@25A under burnin loads...

 

[bigspin]

His system will take AT LEAST 30A.

I have found the psucalc to be overestimating compared to real world values, not every component is going to be running 100% - would you really burn 2 dvd's when gaming? 1xdvd is fine. 4 fans at medium speed ~= 2 x full speed fans in the calc. I got +12v@24.8A and rounded down since the CPU's TDP is a bit high for the E6600.

Another example, this system @ techreports, an X6800/8800gtx/1xhdd/2gb system that clocked in at 187w idle / 277w under load measured at the outlet so if we assume an 85% efficient PSU (the worst case) that is 159w idle / 235w under load on the DC side. PSU calc says 281w recommended power supply wattage, or 330w @ 85% efficiency. That's a bit high IMO.

My own PC clock in at +12v@33A when I plug in all the values - in theory my TPII-480 is running 100%
maybe one day I'll gather the numbers from my kill-a-watt, some DC ammeter measurements and post it. In all honesty I have not given it a second thought - I would be suprised if it is over +12v@25A under burnin loads...

I use eXtreme Power Supply Calculator Lite v2.5 to calculate my wottage
It's 475W with 1 DVD RW .I think i can live with ASUS(Atlas 550W 2 x 12v have 18A+18A[36A] amps)

 

[bigspin]

The total +12v amperage is not the sum of the rails. The aperage rating per rail is the max amount of power each rail is able to take without failing and not the actuall amount of power that rail receives. Read PSU 101 & 102.

I can't understand.....Anyway read this Review about ASUS 550W and tell me what to DO?

http://www.jonnyguru.com/PSU/AsusAtlas550W/

 

[sirheck]

it should push an 88gts fine.
not sure about an 88gtx though.

 

[bigspin]

Everything you need to know about finding the total amperage of the +12v rails and calculating yout system's power needs is in the PSU 101 & 102 Sticky at the top of this section.

Now as you can see on the label of the unit it offers a max wattage of 360W to just the +12v rails. Take that wattage and divide it by 12 to get the amperage of the combined +12v rails. So you have a max of 30A on the combined +12v rails. See to calculate amperage the equasion is Wattage divided by Voltage equale Amperage.

ThnX bro now I can understand what to buy(GTS Finally....) .Hey ThnX again!