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Antec PP303XP and Crap Asus P4S333

S

SmoothSL

Member
Anyone know if and or how to adjust the rails on an Antec PSU???? My USB ports are just dropping out on me while I'm in Win2k and can only think maybe because my 12v 3.3 and 5v are a little low.. Thanks..
 
Well just pop of the casing, HOWEVER, MAKE SURE THE PSU IS FULLY DISCHARGED, or you risk pumping dangerous amounts of current/voltage which in all honesty could kill you.

Anyways, if you get past my disclaimer, just pop off the casing, look around the PCB for two small plastic like screws. One is for the 12V rail, and ther other for 5V. Then, if memory serves me right, you turn clockwise to increase the voltage, and counterclockwise to decrease.

Yeah, they may be hidden amonst wires and such, but remember that not all models have the adjustable Pots. For example, my Antec PP412X does, (I cracked it open when I frist bought it, before I turned it on)

Anyways, and remember, there are capacitors that store energy long after your disconnected the PSU from an outlet.

Be Careful

--Mark



 


<< Anyone know if and or how to adjust the rails on an Antec PSU???? My USB ports are just dropping out on me while I'm in Win2k and can only think maybe because my 12v 3.3 and 5v are a little low.. Thanks.. >>



Sounds more like the driver issue with the Via chipset than a PSU problem. I'm not sure of how to fix it, but it happened to me all the time on my old Abit motherboard. Check out www.viahardware.com & see what you can find over there about it.
 


<< I'd go into the BIOS and see what it reports the voltages to be before going into the PSU. >>



Also remember that it doesn't need to be EXACTLY 12v, 3.3v & 5v to work correctly. My 5v is @ 5.08 - 5.09 right now & my 12v is @ 12.74 - 12.79v and I have fine stability (working on 39 days uptime). And of course opening your PSU will void your warranty (in case you actually care).
 
I think it has something to do with drivers more than with voltage, but Asus tech support wants me to believe it is voltage.. If you are familiar with the P4S333 it has Asus's "Ez-Plug" on it incase you do not have the ATX 12v plug for the P4's.. The tech said I needed to have both the EZ-Plug and the ATX12 hooked up.. It clearly states in the manual it is not needed, but if he's tellin me it can't hurt, I tried it.. No help.. He also said something about EMI coming from the case. Told me to take the MB out and set it on the box it came in or something "nonconductive" and try it.. Still did it.. The Asus utility says my 12v is running at 11.904 at most and running 11.85 usually.. My 3.3 is a little low at 3.29 and the 5.5 is running on average of 4.92 I know those are pretty close to specs, but undervoltage causes more harm that overvoltage to a degree.. I also found out that after I lose my USB ports, I can go into device manager and remove the ports and when it redetects them, everything is back to normal for a while.. If you can shed more light on this, PLEASE do.. I have another board coming in tomorrow I'm going to try.. Because I know Asus isn't going to fess up and say they have trouble.. Thanks!!


Edit!!! 🙂
Here is the latest from Asus... I have tried everything in the book with this and the tech I got today seems to think it's my Promise RAID controller.. He asked, can you take your drives off of the controller and hook it up to the board.. Uhh, NO! 🙂 But luckily I have an extra HD (don't we all) and I will reinstall Win2k on it and try.. He said that was the last thing he could think of.. Keep your fingers crossed people!! Actually, I hope it doesn't work, because that would mean I'd have to lose my RAID.. Crap-a$$ ASUS! 🙂
 
Here is a good link for adjusting the antec PSUs. This one is a PP412X so I dunno if it will be the same as the 303xp. One thing I will point out is that it takes only a VERY slight turn to increase the voltage a good bit, so be careful there. Also, the 5v/12 and 3.3v rails need to be turned differently to increase. 12/5 needs to be turned clockwise, and the 3.3 COUNTER CLOCKWISE to increase. Nut like I said, I'm not sure if the 303xp is the same. You would like to think so.

http://www.3dxtreme.org/psumod.shtml
 


<< I think it has something to do with drivers more than with voltage, but Asus tech support wants me to believe it is voltage.. If you are familiar with the P4S333 it has Asus's "Ez-Plug" on it incase you do not have the ATX 12v plug for the P4's.. The tech said I needed to have both the EZ-Plug and the ATX12 hooked up.. It clearly states in the manual it is not needed, but if he's tellin me it can't hurt, I tried it.. No help.. He also said something about EMI coming from the case. Told me to take the MB out and set it on the box it came in or something "nonconductive" and try it.. Still did it.. The Asus utility says my 12v is running at 11.904 at most and running 11.85 usually.. My 3.3 is a little low at 3.29 and the 5.5 is running on average of 4.92 I know those are pretty close to specs, but undervoltage causes more harm that overvoltage to a degree.. I also found out that after I lose my USB ports, I can go into device manager and remove the ports and when it redetects them, everything is back to normal for a while.. If you can shed more light on this, PLEASE do.. I have another board coming in tomorrow I'm going to try.. Because I know Asus isn't going to fess up and say they have trouble.. Thanks!! >>




That sounds like the via driver problem exactly. I never did figure out how to fix it, I just got an Iwill board & everything works now 🙂.
 
That stinks.. Only thing is, this is on the SiS 645 Chipset.. I'll be home in a few hours and will be trying the system without any I/O cards and see what happens.. The tech mainly blamed it on Win2k and the promise controller.. I can only hope that SiS comes out with a fix, or Asus, or somebody.. Or I'm going to get a Mac! 🙂
 
I dunno if it's a SIS issue. I'm running the Gigabyte ga-8SRX with the SIS 645 chipset. I havn't noticed any USB issues and havn't heard about it on the net with this chipset. My voltage numbers were just like yours and I thought it was holding back my overclock some so I adjusted them up a bit to try to get a higher overclock. Didn't make any difference, but I havn't had any stability issues either way. I've never liked Promise cards much. Their drivers just leave much to be desired...Try it without it. Oh and yeah, DON'T GO MAC!
 
Well, I came home, tried out the system with no IO cards.. NO GO! The tech at Asus said he had no idea and he definately did not think it was a board issue.. He said to contact SiS about it.. I asked him what to do with the board? He said wait a week, he would run this by the "tier 2" people and see what they think.. I don't know if the gateway store is going to take it back or not.. Who knows??? Anyhow, I should have another board at the house tomorrow.. It is another P4S333.. Will see if it does the same.. If so, I may be going with a Gigabyte GA-8SRX.. Looks to have the same specs as what I have.. Then I can tell for certain if it is a Chipset issue or a brand issue.. Hopefully the board I get tomorrow will resolve all issues.. Thanks for the input everybody... If you have any more info on a good DDR333 board, let me know.. Want something that is overclockable too.. I know this chip will do 145x16.. 🙂 Later!
 
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