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Psu for A8N-SLI

G

Gelardi

Member
i'm building the following comp. with a8n-sli, 1 sata hd, 1 ide hd, 1x6600gt, 2'512 pc3200, 2 dvd burner.
i have the following psu: MiCase Power Supply WR400 low noise
It is a "micase WR400" +3.3V/28A,.. +5V/40A,..
+12V/15A,.. -12V/0.8A,.. -5V/0.3A,.. +5 SB/2A
and the text: "+5V & +3.3V combined load 235W"
(total output 400W)

Would these specs be good enough likely ?

If not i tought of that: http://www.outletpc.com/c0843.html



tks.peter
 
Yeah that should be fine. Is your PSU a 20 pin 1.3 or a 24 pin 2.0 becaue the A8N is a 24 pin MoBo? Many still use the 20 pin and just leave the last 4 pins on the board open but if you plan on overclocking i would look into a 24 pin PSU. I got one just because i felt like it but it would be up to you. The power issues some people were have were dealt with in BIOS update.
 
I wouldn't even consider using the Asus A8N with anything less than 18a on the +12v rail and a 24 pin connector.

It'll cost you more in the short run but I'd recommend a Seasonic power supply. If you never ever plan to use 2 video cards (SLI) then you can get away with a Super Tornado 350 which hits 19/21 amps on the +12v and can be bought for around $55 US.

The pluses are its a very effecient PS (lower electrical bills), less heat, and less noise. The minuses are that it doesn't have the connectors or the +12V to handle super high end dual video card setups (SLI with the extra 6 Pin PCIe connectors).

If you think you might go SLI down the road you should look at the Seasonic S12 which is considerably more expensive but offers way more on the +12V and has the PCIe connectors for the highest end video cards.
 
Whoa 15a on the +12v rail.. thats not good at all.. Asus themselves say 17a on min load and 25a on full load... Get some more amps on the +12v if i were you..
 
^Ditto. 15a on the 12v rail isn't even plausibly usable for any kind of use with any A64 system, let alone an Sli box.
 
I didn't even see the Amperage so I'm going to have to go with the other guys and agree! PSU is the most important part of the System since it is not only responsible for operation but for protecting form over voltage and even under voltage! I got the Enermax It's expensive but it's worth it. ACTIVE PROTECTION!
Don?t take our word for it see for your self!

PSU Review:
http://www6.tomshardware.com/howto/20050228/index.html

Asus Power Recommendation
http://usa.asus.com/products/mb/socket939/a8nsli-d/overview.htm#
 
To be honest, I would not consider recommending anything less than 25 amps on the 12V rail. That way you will be certain that you have enough even for heavy load. And for my own systems, I do not go any lower than 30 Amps on the 12V rail, since I know I will add components that utilize the 12V heavily. 18 Amps might be fine for a bare-bone system with one harddrive, a low-end graphics card, and a slower CPU, but why not get something that is good enough for whatever you might put into your system? it will save you a lot of headaches later down the road.
 
This has already been said multiple times in this thread but I'll add my 2 cents just because I feel this can't be emphasized enough. AVOID THESE CHEAP POWER SUPPLIES LIKE THE PLAGUE! Don't build such a nice system and then compromise it's stability and possibly even the life of the components (if the PSU goes, it can take other components with it) with a cheapa$$ power supply. Spend a little extra and get quality. You don't have to go all out and spend 250 bucks on a PC Power and Cooling SLI unit but don't go the other extreme route and get a $35 dollar unit that's not worth the components it's made of either. Go with a quality brand with a good reputation and proven warranty program. And, preferably, stick with a single 12V rail unit for these boards.
 
Check out the list of power supplies that have been SLI certified by nvidia.

Certified Power Supplies

From what I've heard, most of the major PSU manufacturers have submitted units for certification but these are the only ones to get it so far.
 
Originally posted by: RY62
Check out the list of power supplies that have been SLI certified by nvidia.

Certified Power Supplies

From what I've heard, most of the major PSU manufacturers have submitted units for certification but these are the only ones to get it so far.
Click to expand...

That's a hilarious list of two psu's, both from PC&P, and both over two bills. Here's one I've been using in all my Sli builds, and it's great for server/dullie environments as well, and comes highly recommended for demanding use by Tyan. I've used this in FX55/Dual 6800Ultra builds with loads of power to spare. 😉 ---> Athena Power 500W Model AP-P4ATX50F12

 
It is funny that, as long as SLI has been available, there aren't any more PSU makers that could pass the certification.

I think nVidia may be a little slow at updating the list because I heard that the 650w SilverStone ST-65ZF was just recently SLI certified. This might be one to look for because it can be a had for alot less than what I paid for the PCP&C.
 
The Silverstone is a tri rail psu. All you really need is a decent single rail unit, well made by all standards, supplying at least 26a on the 12v rail. That will handle any Sli box in existance and should also cover the same with dual core processors when they hit the pipe. I'll reserve the dual core part of that statement until I see a few in real world apps and get a read on power consumption in NF4 use, but I can't really see more than 28a on a single 12v rail being needed. 😉
 
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