Volt modding an enermax EG465P-VE FCA? [Archive]

Ace-a-Rue

12-16-2002, 07:51 PM

Here is what you do. 1st, be careful when you work inside the PS case. Beware of those large capacitors that can hold a very high charge of electricity for an extremely long time.

You will work right in front of the exhaust cooling fan. Unscrew the fan to get it out of the way while you do this. That will give you more room to do the snipping and soldering.

The resistor you are after is R82. R81 slot has no resistor and you can almost see R82 number among the 2 wires.

I snipped the middle of R82 and then worked the residue off leaving behind the wire leads extending up from the PCB. I then cut 2-8 inch (approx) lengths of 22 or 24 gauge multi strand wire.

I used a Radio Shack 10K pot and I set it ahead of time to 7K ohms. This is very important to do this prior to soldering the wires. Setting 7K will approximate 5/12 output. You also must determine which direction will be increasing ohms because that will increase your 5/12V rail.

Now, one wire goes to the center lug and the other wire goes to either outside lug that you determined will increase ohms. Diagram that on paper so you don't forget. Use a 15-20W soldering iron. Put the wires thru the back case louvre opening and route them towards R82. Don't forget the top case fan will sit down on top of those 2 wires so route them to one side and use plastic ties to keep them in place. Best to stay away from those 2 heatsinks. I routed mine along the bundle wires that exit the supply.

Back to soldering inside the PS case. You cleaned the resistor material away and now you have to 2 leads standing vertically. Solder one wire to each lead. That's it. Put it back together and now you have control, on the fly, of your 5/12 rail!

Set the 5/12 using either a DVM or the bios. Just beware the bios is notoriously off on voltage readings. Better to use a 4 pin plug to read/set the 5/12.

Good luck!!:D

http://home.nc.rr.com/boeing/enermax/Enermax_1.jpg

http://home.nc.rr.com/boeing/enermax/Enermax_2.jpg

http://home.nc.rr.com/boeing/enermax/Enermax_3.jpg

Dissolved

12-16-2002, 08:36 PM

how high does yours go when you turn it up?

Ace-a-Rue

12-16-2002, 08:41 PM

You can punch the heck out of it so be careful as you turn the pot. I would recommend very, very small turns.

I find the 12V rail is weak on the early models like this. This power supply isn't very good for Intel boards because you need a strong 12V. Now, for AMD cpu's and m/b's, the 5V seems most important. I have mine set for about 5.3V and that gives me about 12V.

sjohnson

12-16-2002, 08:46 PM

Also, note that if your motherboard regulates the 3.3 supply (like many of the ABIT boards), adjusting the 3.3 rail of the PSU can be counter-productive. Increasing the 3.3 too much in this case will make the board's voltage regulator work hard to bring down the higher voltage, which may lead to motherboard instability or failure.

Dissolved

12-16-2002, 08:53 PM

i only need my 5 and 12 to be adj.

my 3vline is 3.5 :)

Ace-a-Rue

12-16-2002, 09:21 PM

This mod says only 5/12. We never talked about 3.3V rail.

Dissolved

12-16-2002, 09:29 PM

just wondering, But is there some kind of gloves i could use so i wouldnt get shocked?

Ace-a-Rue

12-16-2002, 09:35 PM

The capacitors are on the opposite end of the case so I don't think it should be a problem. But, I would be remissed if I didn't mention it to you so you are fully aware while doing this mod.

If you were poking a straight edge screw driver down between the capacitors, then I would be very concerned.

Dissolved

12-16-2002, 09:39 PM

oh yea, i wanted to lick the caps to see what they tasted like.. :D

Ace-a-Rue

12-16-2002, 09:42 PM

Sure!:D You like to get a charge!!:p

Dissolved

12-16-2002, 09:43 PM

pcb boards always did taste yummy..

sjohnson

12-16-2002, 10:01 PM

Heck, sorry guys but you aren't the only ones posting, from Nico:
"Dissolved,

AMDMB 's Epox motherboard forum had a good thread run for the 5/12v mod and also there was recently a 3.3v mod that has been tried, sucessfully.

5v (12v) mod

3.3v mod

"

and then Dissolved never stated which rails he wanted to adjust. Guess I'll just stay away...

Dissolved

12-16-2002, 10:03 PM

Originally posted by sjohnson
Heck, sorry guys but you aren't the only ones posting, from Nico:
"Dissolved,

AMDMB 's Epox motherboard forum had a good thread run for the 5/12v mod and also there was recently a 3.3v mod that has been tried, sucessfully.

5v (12v) mod

3.3v mod

"

and then Dissolved never stated which rails he wanted to adjust. Guess I'll just stay away...

he didnt mean to offend you...

sjohnson

12-16-2002, 11:12 PM

'K, NP gents. Good luck on the mod ;)

Nico

12-17-2002, 12:36 AM

Guy's, the 3.3 mod is good for boards like Epox that don't generally have i/o voltage adjustment. Abit / Asus etc generally do some adjustment available.

I modded my 5v rail (12v as well) by adding a 1k VR to the R82 resistance. That worked very well with very fine adjustment over a number of turns. I never did the 3.3 mod because I was getting 3.28 - 3.36 which was acceptable.

Dissolved

12-17-2002, 01:39 AM

well 1k or 10k? which is easier?

i dont like senitive pots.. So which one would i have to turn more to fine tune?

Nico

12-17-2002, 02:10 AM

Put it this way, with 1k you have say 12 turns to adjust 4.7 - 5.4. With 10k you might have 1 - 1.5 turns to cover the same range (assuming it is also a 12 turn VR).

Dissolved

12-17-2002, 02:14 AM

heh aight, ill see what rat shack has then :)

Ace-a-Rue

12-17-2002, 05:06 AM

I think it is different using a 1K versus 10K. The guy who told me this was specific about having the 10K set at 7K before soldering. So, using a 1K doesn't sound right.

Turning the 10K is senstive so like a a 1/16" turn will get results.

Dissolved

12-17-2002, 05:07 AM

aight, if my buddy come over tomorrow i should have this done by tonight.

Ace-a-Rue

12-17-2002, 05:15 AM

Listen, I just read the the thread and what they are doing is adding a 1K VR to THE EXISTING resistor to make it 8.XX value. SO, don't cut the the present resistor if you are going to do it that way.

If you look at page 2 (5V Enermax, EPOX), there is a guy who uses a 15 turn 10K pot from RS. He gives the number so you can use that instead than my miniature. I presume the one he uses is the large size one.

Good luck.

Ace-a-Rue

12-17-2002, 05:23 AM

Originally posted by sjohnson
and then Dissolved never stated which rails he wanted to adjust. Guess I'll just stay away...

Don't go away in a tiff.:) If I sounded abrupt, it was due to not wanting to insert a 3.3 talk when plainly my mod was talking about 5/12. I thought the 3.3 talk would confuse the issue.

The 5V issue is the main issue for AMD boards and processors. I agree with your statement that using above 3.3 can actually destabilize the board. That was at least my observation when I adjusted my 3.3 to about 3.45 or slightly higher. I think that was on an Abit board.

Dissolved

12-17-2002, 05:23 AM

Originally posted by Ace-a-Rue
Listen, I just read the the thread and what they are doing is adding a 1K VR to THE EXISTING resistor to make it 8.XX value. SO, don't cut the the present resistor if you are going to it that way.

If you look at page 2, there is a guy who uses a 15 turn 10K pot from RS. He gives the number so you can use that instead than my miniature. I presume the one he uses is the large size one.

Good luck.

That got me really confused? :confused: :confused: :confused:

Ace-a-Rue

12-17-2002, 05:25 AM

What are you confused about.....

Dissolved

12-17-2002, 05:30 AM

Originally posted by Ace-a-Rue
What are you confused about.....

i dont get AMDMB's mod of this psu at all.. that thread to me is a bunch of mess.. i cant get anything right in my head? :confused:

your way sounds alot easier..

clip the resitior, solder the pot on its 2 points, set it to 7k boot to bios and tune in..

i mean how is AMDMB easier then that?

BTW. how exactly do i set the pot at 7k? i have a nice 100dollar mmetter i got last year for xmas, but i dunno how to take ohms with it..

what it looks like with my psu on the side :)

Ace-a-Rue

12-17-2002, 05:33 AM

What scales do you have available to set on your meter?

a.p.versteeg

01-02-2003, 02:45 PM

I`m having a enermax EG465AX-VE, does anybody know`s how to mod this one?
I`m having trouble with my 12v on a Epox 4PEA+, When it`s hi oc`d(P4 2.8@3.650mhz) 1.775Vcore my 12v is 11.60.
I looked for the R82 but I can`t find it on the pcb.
Help. :(

Nico

01-02-2003, 04:20 PM

Front edge near the 80mm fan, it should be the same for all Enermax models.

a.p.versteeg

01-02-2003, 04:41 PM

Originally posted by Nico
Front edge near the 80mm fan, it should be the same for all Enermax models.

nope. :(

a.p.versteeg

01-03-2003, 12:45 AM

Originally posted by a.p.versteeg
I`m having a enermax EG465AX-VE, does anybody know`s how to mod this one?
I`m having trouble with my 12v on a Epox 4PEA+, When it`s hi oc`d(P4 2.8@3.650mhz) 1.775Vcore my 12v is 11.60.
I looked for the R82 but I can`t find it on the pcb.
Help. :(

no body know`?????

Ace-a-Rue

01-03-2003, 10:05 PM

Do you have a R82 resistor (very edge of the PCB) by the (exit) exhaust fan inside the case??

Dissolved

01-03-2003, 11:19 PM

do you think i should take the pcb out of the psu case? or leave it in there?

im horrible at soldering. so i hope i dont mess up.

a.p.versteeg

01-04-2003, 12:43 AM

Originally posted by Ace-a-Rue
Do you have a R82 resistor (very edge of the PCB) by the (exit) exhaust fan inside the case??
no, nothing. the highest nr I see is : R81, and normal it`s empty but in this PSU there is a resistor. :(

a.p.versteeg

01-04-2003, 06:55 AM

Yeah it`s done.

In my Enermax .EG465AX-VE I can`t find the R82 so I taked the R73(what`s almost in the same place like the R82 in the old enermax PSU. The messure was 2.439 with resistor still in place. So I removed the resistor and placed a 10Kohm VR and set it when it was placed to the same 2.439. When I start it up the 12v was stil the same like before the mod, turned the VR a little and the 11.65 rise to the voltage I like , 12.40volt and the 5volt is also rising to 5.3volt.
Yeah, now I can try to OC higher than 3650mhz. I will post it when it`s hapend.

I`m very happy :)

Ace-a-Rue

01-04-2003, 08:24 AM

Originally posted by Dissolved
do you think i should take the pcb out of the psu case? or leave it in there?

im horrible at soldering. so i hope i dont mess up.

I am horrible too. You can do it right in the case by just removing the exhaust fan and laying it to the side while soldering. I found to have enough room even for ole-fat fingers, me!:D

Ace-a-Rue

01-04-2003, 09:09 AM

Originally posted by a.p.versteeg
Yeah it`s done.

In my Enermax .EG465AX-VE I can`t find the R82 so I taked the R73(what`s almost in the same place like the R82 in the old enermax PSU. The messure was 2.439 with resistor still in place. So I removed the resistor and placed a 10Kohm VR and set it when it was placed to the same 2.439. When I start it up the 12v was stil the same like before the mod, turned the VR a little and the 11.65 rise to the voltage I like , 12.40volt and the 5volt is also rising to 5.3volt.
Yeah, now I can try to OC higher than 3650mhz. I will post it when it`s hapend.

I`m very happy :)

Good show!!:cool: Great to hear you figured it out on your own! A good sense of accomplishment from doing that, huh??:)

shortcircuit

01-04-2003, 05:27 PM

Originally posted by a.p.versteeg
Yeah it`s done.

In my Enermax .EG465AX-VE I can`t find the R82 so I taked the R73(what`s almost in the same place like the R82 in the old enermax PSU. The messure was 2.439 with resistor still in place. So I removed the resistor and placed a 10Kohm VR and set it when it was placed to the same 2.439. When I start it up the 12v was stil the same like before the mod, turned the VR a little and the 11.65 rise to the voltage I like , 12.40volt and the 5volt is also rising to 5.3volt.
Yeah, now I can try to OC higher than 3650mhz. I will post it when it`s hapend.

I`m very happy :)

I just did the same mod. I only had a 20k VR though... it's really really touchy. I also took the opportunity to swap out the 80mm fan for an 80mm antec clear tri-color fan.

Thanks for the mod!! Next I want to try the 3.3v mod...

edit: I'm up and running with the modded psu now... before: 4.65v/11.45v, after: 5.10v/12.65 :)

sysfailur

01-08-2003, 01:54 AM

Damn I thought this would for me but I don't think it's gonna......

I have the EG465AX-VE(W) and I'm not seeing the resistor mentioned... I have a diff. layout compared to that. :(

a.p.versteeg

01-08-2003, 03:12 AM

Originally posted by sysfailur
Damn I thought this would for me but I don't think it's gonna......

I have the EG465AX-VE(W) and I'm not seeing the resistor mentioned... I have a diff. layout compared to that. :(

i have the same PSU, the EG465AX-VE.
and the R73 is a little right from the fan, on the edge of the pcb.Can`t mis, it`s on the left from a blackresistor.

Ace-a-Rue

01-09-2003, 09:35 PM

I wanted to tell you a.p.versteeg that your home page is awesome with that modified case. It is sweet!:cool:

sysfailur

01-10-2003, 05:42 AM

Originally posted by a.p.versteeg
i have the same PSU, the EG465AX-VE.
and the R73 is a little right from the fan, on the edge of the pcb.Can`t mis, it`s on the left from a blackresistor.

Ohh geeze I missed your post! I will try that. Thank you!

sysfailur

01-10-2003, 07:45 AM

Mwahaha it worked! :) I was a bit scared, as when I turned the psu on my voltages on my +5V line were @ 8V!!! I quickly turned it down! :P

Pics...

http://www.maximumoc.com/img/hardware/enermax_volt_mod/close_up2.png

http://www.maximumoc.com/img/hardware/enermax_volt_mod/testing.png

More angles of the soldering ;) - http://www.maximumoc.com/img/hardware/enermax_volt_mod

Ace-a-Rue

01-10-2003, 08:36 AM

You must of missed that point about setting the ohms on the pot before attaching/soldering or powering up. On my model Enermax, I had to set about 7K ohms before soldering to the circuit board.

I am going to break back into the PSU case and see what ohms is now reading with my 5/12 at 5.3/12.4. I want to see if there is any difference in readout for the R72 versus R82 resistor.

a.p.versteeg

01-10-2003, 08:56 AM

Originally posted by Ace-a-Rue
You must of missed that point about setting the ohms on the pot before attaching/soldering or powering up. On my model Enermax, I had to set about 7K ohms before soldering to the circuit board.

I am going to break back into the PSU case and see what ohms is now reding with my 5/12 at 5.3/12.4. I want to see if there is any difference in readout for the R72 versus R82 resistor.

it`s the R73, and yes there is a difference in ohm.
The R82 stil in place is 2.24Kohm and the R73 is with the resistor still in place 2.44 Kohm. ;)

Ace-a-Rue

01-10-2003, 08:23 PM

In another Enermax thread talking about this mod (my model Enermax), they said to preset the 10K pot to 7.5K to approximate 5/12 output. I used 7K to be conservative for the output until I could check it.

It looks like this newer model with R73 resistor would have a higher pre-set on the 10K pot maybe around 8K or slightly higher before soldering to the board.

RuKK

11-10-2003, 03:12 PM

//edit Alright so maybe I have another question.. the resistor has 3 pins on it, I know the middle one is ground, so the quesetion is do I just attach ground and one of the other two to the resistor on the PSU, or do I ignore ground and use the other two?

Ok so if I add a 1k VR to my R82 and set it to full resistance I can then back it down after starting the psu up (obviously not with my system attached)?

My only problem is I got my 1k VR from a dead AT PSU, and its range is about 2/3rds of a turn for 0 to 1k ohms.. is this too sensitive? Thank you very much,

-RuKK

Nico

11-11-2003, 01:30 AM

use the middle pin and one of the two outside pins, depending on which direction you wish to turn the POT. I usually set it so clockwise turns increase voltage.(more voltage is less resistance from the POT)

iceman2g

11-18-2003, 06:13 AM

Would I adjust the voltage while the system is on? Also i've got one of these (http://www.radioshack.ca/estore/Product.aspx?language=en-CA&product=2710281&category=Pots%2fControls&catalog=RadioShack) pots how would I connect it in series?

Ace-a-Rue

11-18-2003, 07:17 AM

Originally posted by iceman2g
Would I adjust the voltage while the system is on? Also i've got one of these (http://www.radioshack.ca/estore/Product.aspx?language=en-CA&product=2710281&category=Pots%2fControls&catalog=RadioShack) pots how would I connect it in series?

I copied this (now modified for you) from a written review that I did a while back using this type of POT. Make sure you got the right ohms trimmer which should be 10K so you can set 7.5K before doing any soldering.

you will solder your 22 or 24 gauge multi-strand to the middle lug of a 10K pot. Now, depending on what direction you want to turn the pot to increase (raises voltage output) resistance will determine which outer lug you will use to solder the other wire. You should set the resistance first to 7.5K. WARNING, REMEMBER WHICH DIRECTION INCREASES RESISTANCE, IN FACT, DIAGRAM IT ON PAPER SO YOU DON'T FORGET!

iceman2g

11-18-2003, 07:59 AM

ok my R82 resistor reads violet/brown/green/brown/brown. I've got the 460W version of this PSU. Would this mod work for me?

Ace-a-Rue

11-18-2003, 09:21 AM

Don't know about the colors. Read thru this thread to see if someone posted those colors

Electroid

12-25-2003, 01:48 PM

Enermax EG465AX-VE(G) vmods:
+3.3V ?
+5V/12V, R73?

sjohnson

12-25-2003, 02:32 PM

To decode the color bands on a resistor, check out http://webhome.idirect.com/~jadams/electronics/resistor_codes.htm

thesaucier

01-17-2004, 02:57 PM

I was looking at my voltages in the bios and On a NF7 they would drop to 11.76 while at 1.85 vcore even more of a drop to say 11.74 while at 1.9 vcore. I have been having problems getting higher than 125 FSB and I think this is it. While looking at this tread I checked my molex voltages and they read steady 5.17 and 12.17 volts. What should I be thinking now! what reading should I be looking at. It seems to be acting like a voltage problem and the bios seems to show this but the readings at the molex dont. Im not sure how accurate this mutimeter is however.

Ace-a-Rue

01-17-2004, 04:25 PM

I would say it is the board voltage regulation that is out of whack. If your Molex voltages are that, the low 12v rail on the board could be caused by higher resistance in the trace wiring or the regulation is sub par.

If you put in the adjusting pot, you can put higher 5/12 to the board to help compensate for the lost through the trace wiring or regulators...

thesaucier

01-17-2004, 07:32 PM

Originally posted by Ace-a-Rue
I would say it is the board voltage regulation that is out of whack. If your Molex voltages are that, the low 12v rail on the board could be caused by higher resistance in the trace wiring or the regulation is sub par.

If you put in the adjusting pot, you can put higher 5/12 to the board to help compensate for the lost through the trace wiring or regulators...

Would this effect the 12+ and 5+ to the molex and raise those as well or does this just effect the 12+ and 5+ to the board??
I dont want to burn out the drives you know.

Thanks for the reply:D

Ace-a-Rue

01-17-2004, 07:40 PM

5% override for 5 would be 5.25v and the 12 would be 12.6v. PS makers allow 10% before they would switch out a PS for warranty. Just make sure you have some fan cooling the drives. They should be ok.

thesaucier

01-17-2004, 08:38 PM

Thanks Ace-a-Rue I have 12.17 at the 4 pin molex now but I have 11.74 in the bios thats what concerns me. Could the 4 pins be getting the power and the board not??

Ace-a-Rue

01-17-2004, 08:48 PM

Originally posted by thesaucier
Thanks Ace-a-Rue I have 12.17 at the 4 pin molex now but I have 11.74 in the bios thats what concerns me. Could the 4 pins be getting the power and the board not??

If you said you measured at the Molex connector is correct, you are losing 12v voltage somewhere along the line. of course, this is predicated on your bios or probe readings are accurrate. Some times bios and software probe readings can be inaccurate.

There are two ways to help yourself. One is do the mod to the PS, or, start reading the voltages at the Mosfet around the cpu to see if it is really low. Be careful with this operation so not to slip with your probe and short out the Mosfet, which will kill the board. Choices!;)

thesaucier

01-17-2004, 09:04 PM

Originally posted by Ace-a-Rue
If you said you measured at the Molex connector is correct, you are losing 12v voltage somewhere along the line. of course, this is predicated on your bios or probe readings are accurrate. Some times bios and software probe readings can be inaccurate.

There are two ways to help yourself. One is do the mod to the PS, or, start reading the voltages at the Mosfet around the cpu to see if it is really low. Be careful with this operation so not to slip with your probe and short out the Mosfet, which will kill the board. Choices!;)

That sounds good to get an Idea of whats going on. What are the measure pionts I should look at?

Ace-a-Rue

01-17-2004, 09:16 PM

Originally posted by thesaucier
That sounds good to get an Idea of whats going on. What are the measure pionts I should look at?

You should see mosfets, and, I presume you know what I am talking about???? They should be in sets of two, aprox. 6 or 8 around the cpu socket. Not all are going to give you 12v readings but one or two will. be careful here so to not slip with the probe and short out between out and middle legs!

thesaucier

01-17-2004, 09:26 PM

Originally posted by Ace-a-Rue
You should see mosfets, and, I presume you know what I am talking about???? They should be in sets of two, aprox. 6 or 8 around the cpu socket. Not all are going to give you 12v readings but one or two will. be careful here so to not slip with the probe and short out between out and middle legs!

Go either leg to ground or what? And thanks for the help. :banana: