• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Enermax 465 VE - 5v adjustment?

Noid

Noid

Platinum Member
my 5v supply drops to 4.49v on load

and right now (no load) is around 4.9v

Is there a adjustment inside these PSU for adjusting voltage?

I cant help thinking its affecting my oc.
 
... I cant ... I been living with it the way it is since I got it,,, over a year I think ...

dont think the warranty going to cover it...


I was hoping there might be a manual adjustment inside the PS I can tweak.
 
I have the Enermax 365 model, and there is no manual adjustment for any of the rails. I think this will hold true with the 465 model as well. Sorry.
 
Only way to manual adjust the 5v (and 12v) line is to swap out the r82 resistor with a 10k potentiometer (set to 7.15k). Or hardwire in a 7.15k resistor to the same spot. It's fairly easy if you have some soldering skills.
 
... is the r82 resistor in the PS or on the MB?

.. this will change the voltage in 12v also?

... and what does the 5v supplies to what components?
I'm wondering if I have instablility in these areas.


I can do soldering ...
 
Hey thanks...

I just was lookn at my 12v line ,,,, under load ~12.20v .... idle 11.98v
Interesting my 12v increases under load about .2v ,,, while 5v line drops .5v

think my Maxtor HD's drawing to much?

is there a link with pics for the mod?


 
It may be mb dependent. My 2 previous AMD boards showed 5v at 4.81 and 4.97. The same ps with a P4 system reads 5.08
 
Public service announcement... The large capacitors in a psu can charge to over 300 volts. Normally they should discharge when the psu is turned off, but not always. You should always be sure these filter caps are discharged before doing anything to a psu. I got shocked by a 330 volt cap in a TV a few years ago, 😱 it really sucked and I haven?t made the same mistake again - and i hope no one else does either. 🙂
 
wow ... thats a bad PS u got there..
my prob is I didnt think 4.9 was too outta spec (at idle)
so I didnt send it back

But now that Im OCn I get some inconsistanies in my readings

I dont know when Im going to do this mod ... (maybe after I contact Enermax)
 
Hey ... LastStop ... Im looking for you for some advice ...

I just got back from RadioShack with a 10k pot.

Turns out theres lots of different kinds ...
... and I they dont have a resistor rated 715 Ohm there.

... can you tell me if I got one that will work?

Part# 271-1721
10k-Ohm
Audio-Taper
250vDC @ 0.25W

There were others with lower DC ratings and others with higher watts.
And others with combination of both.

I selected this one because its smaller than the others.
(I wont have to cut the knob shorter)

What are the Pot specs on yours? I worried the Watt rating is too low.

I assume I use only 2 of the leads on this...
I should use the ones im setting the resistance with ... correct?
 
Hi Noid,
I would highly recommend that you get a higher quality potentiometer than the one you got. The cheaper ones usually get dirty over time and can cause the resistance to spike. I use a cermet style potentiometer which are very small and easy to fit inside the psu. I got mine at fry's electronics. The leads you use on the pot is the middle one and either of the other 2 leads. The outer leads determines which direction of rotation (cw or ccw) of the pots' shaft/screw, increases/decreases resistances. You can always check by using a multimeter if you're still unsure which leads to use.

Specs

You want either a 10k pot or a 7.15k .01% resistor. The pot will let you adjust the voltages manually. Just a word of caution, make sure you set the pot to 7.15k before you solder the pot in to the psu. The resistance will be lower afterwards since there are other resistors inline with the r82 resistor.
 
Hi ! .... Thanks for your prompt reply !

Ya ... I want to do this right the 1st time. Thats why I asked.

I dont have a Fry's in Chicago, and the Outpost.com doesn't have electronics.
I'll be calling around Chicago tomorrow from the Yellow pages.

So, I might be ordering from Mouser I guess.

Sorry for so many questions that follow ...

You must have a digital multi-meter?
I got an old metered type. (that I had to rewire last nite cuz of battery corrosion... lol)

1) Should I make the jump to digital multi-meter?

I was lookn at some cermet's at RS ... wondering to myself if i could use one of them instead.

2) Can remember your part number?

... So ... I know Im getting the proper part tolerances?
(volts , amps, watts / If you dont know I can call Fry's if you have part number)

3) I was thinking the cermet would be better to use if I need an adjustment. But, it sounds like I wont
get a good meter reading once its soldered in place?

The resistor route sounds easier.

4) Is the resistance you say I need based on my post's MB readings?

Cuz,,, the 5v rail actually drops to 4.46 sometimes ... (using HOTCPU to test)
My readings are a bit higher at idle now though (4.92v now)
(I re-arranged the Fan connectors and put the 9700 on its own lead and my Backup 30g Maxtor drive is disconected)
If you want to find out why ... check the overclocking forum here for my post on 'Prime95 and 3dMArk at same time' thread.

5) Vsb - also drops to 4.26 sometimes! ... will this also be corrected?

Heres the specs on my PS:

Model - EG465P-VE

+5Vsb 2.2A
+5v 44A
-5v 2A
+12v 20A
-12v 1A

6) Is there a way to safely discharge the capacitors inside before starting work on it?
 
PSU mods = fun

once i got a big shock while doing one
then i found out the power supply was plugged in =/
maybe it knocked some sense into me because i havent tried that again =P
 
You must have a digital multi-meter?
Click to expand...
Not necessarily, you can always set the potentiometer to a value lower than 7.15k. After it is installed and running, you can adjust the voltages from there.
Can remember your part number?
Click to expand...
It's been awhile since I did this mod so I really don't remember which part# I used. Any of those cermet potentiometer on that page will work. Just choose one that will fit your needs. Specwise, just make sure it's a multiturn version. The R82 is just a feedback resistor so it doesn't require that high of tolerances.
I was thinking the cermet would be better to use if I need an adjustment. But, it sounds like I wont
Click to expand...
You can still adjust the cermet style pot before soldering it in. One other thing you might want to do is to check the resistanc of the r82 resistor prior to removal and then match that resistance when the potentiometer is installed.
Vsb - also drops to 4.26 sometimes! ... will this also be corrected?
Click to expand...
I'm not too sure about that one. I don't have my enermax anymore so I can't really tell you if it does.
 
thanks LastStop

I ordered the cermet (listed under fig H on the spec sheet) from Mouser.

Expected delivery on Thursday.

I'll post my results after the fix.

I was suprized to find no electronics distributors in Chicago.
 
... wow ... I cant believe this ...

I got an RMA ok from the Enermax corporate office.

Even though I bought this in May of 2001.
(I think they didnt want me to do the Mod)

I have to call Directron tomorrow to see If they will handle this. (crossing fingers)
(I got it with my Fong Kai case)

It still might be easier to do the mod ... lol.
 
Do a reality check with a good multimeter and you might be surprised at the results. Motherboards are motherboards, not voltmeters 😀
 
Ya .. I hear ya ...

my problem

I did the voltmeter on the +5 lead on the ATX connector.
Same readings as MB at idle and load.
(corner right hand +5v lead)

------- EDIT / UPDATE ----------

Directron wont handle the RMA (over 1 yr).
Waiting to see what Enermax says.

---- Update to Update --------

Recieved RMA from Directron
 
I didnt receive a reply from Hotpoint subsidiary ,,, but my part arrived today.
so ,,,
Call the police for a 'well bieng' check if you dont hear from me tomorrow.

😛
 
I didnt fry myself 😛

What is too high for +5v rail ?
What is too high for +12v rail?

I have a conciderable increase in the 12v rail after adjusting to +5v

Idle

4.97~5.00v
12.17~12.23v

Load

4.60~4.65v
12.35~12.53v

Notice the increase on the 12v rail on load while the 5v drops?

Whats up with that?

My benchmarking determined 11.5 x191.4 = 2200.7 is optimal

And !!!

My memory is back at Cas 2, bank 4, 2,6,2,2-1T 😛

(didnt have enough CPU voltage (1.85v) to stablize 12 or 12.5 in the same tests using Prime95 and 3dMark at same time)

With the multiplier at 12 my 3dMark only gained 200 points from the 15,405 score I get at 2200Mhz anyway.
(no 9700 oc)
I cant see pushing that much voltage for 200 points.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top