Ultra Xfinity 600w 5vsb mod

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

That was a freebie from a computer shop......supposedly a bad one. I powered it up once and everything seemed to be functioning. Looking it over, I thought ..... looks like Ratdude written all over it. Having no computer to put it in,,,,,,I put it in a box and sent 600 "cool" watts your way. Hope you enjoyed my humor........the cool watts! Just didn't see the point in tossing it on the shelf just to be forgotten about. Sounds like you did a great job in going over it and fixing all the little problems. Enjoy!

Don't make ole blue jealous.....find a home for him too.........

I may build a media rig using some extra parts I have... if so, that's where ole blue will go. Between now and then I'll replace the fans in it.

[everell]

Re: Ultra Xfinity 600w 5vsb mod

That was a freebie from a computer shop......supposedly a bad one. I powered it up once and everything seemed to be functioning. Looking it over, I thought ..... looks like Ratdude written all over it. Having no computer to put it in,,,,,,I put it in a box and sent 600 "cool" watts your way. Hope you enjoyed my humor........the cool watts! Just didn't see the point in tossing it on the shelf just to be forgotten about. Sounds like you did a great job in going over it and fixing all the little problems. Enjoy!

Don't make ole blue jealous.....find a home for him too.........

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

I opened up the unit and found that the heatsinks were hot and the fan was connected.

I used a bench PSU to test the fan... no issues there.

Looking at the PCB, I found that the transistor that drives the fan had some sketchy looking joints... I resoldered those

Not knowing how long it had run w/o the fan, I preemptively recapped it... I used a mix of Sanyo WG, samxon GD, and nichicon HM (it's what I had in stock).

After that, I closed up the PSU and jump-started the PSU outside the case. To my surprise, the fan spun up just fine. Once I re-installed it into my main rig, it fired right up, fan and all.

I wish I had taken the time to take some pics of the fixes... sorry about that.

Thanks Everell for another fix-me freebie... And don't worry, you transformer kit shipped today.

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

It came in... pics coming soon in another thread.

It will likely replace the ultra in my main rig due to what conenctors are and aren't there.

edit:

I found a review with IMHO better quality pics:

http://www.hardwaresecrets.com/article/929

from what I saw it is a far better unit for may main rig:

- it is modular and happened to have all of the right connectors for the system (once I swap the SATA DVD burner for a PATA one, using an adapter for now)
-it is single rail, which is good since it is a non-PCIe system... many PSUs would have half the 12V where I couldn't use it w/o rewiring


The onluy issue is that the PSU hole in the case doesn't quite work... I will probably do a little dremel work to fix that.

Also, I can't get the fan to kick on... either I forgot to re-connect the fan wire or it really runs that cool/well.

---

the Blue PSU will still see use... I have plans

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

It came in... pics coming soon in another thread.

It will likely replace the ultra in my main rig due to what conenctors are and aren't there.

[everell]

Re: Ultra Xfinity 600w 5vsb mod

post some pretty pictures when it arrives

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

Glad ole blue is still running..........but.........600 cool watts are coming your way. Should arrive Wednesday. UPS tracking number is 1z291x360319379012. Where is that Bestec transformer?

huh?

I'll get the transformers sent... college work bested me again.

[everell]

Re: Ultra Xfinity 600w 5vsb mod

Glad ole blue is still running..........but.........600 cool watts are coming your way. Should arrive Wednesday. UPS tracking number is 1z291x360319379012. Where is that Bestec transformer?

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

Noted.

I may keep my eyes open for something local first... we'll see.

[c_hegge]

Re: Ultra Xfinity 600w 5vsb mod

A few of these would do fine.

If you have a few extrs $ to spend, then these might be a bit better.

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

6 month Stability update.

The PSU runs fine... it ultimately ended up in a revised main rig running twin Xeons (3.2ghz gallatin core).

The only issue is I think one of the fans I tossed in is starting to go out... I may keep my eyes open for a pair of better quality PSU fans... Any Brand/model suggestions?

Side note- when I do swap fans,I may take some pics... the last batch I took was never posted (they didn't turn out).

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

i re-added the OCP parts to the board, as i would rather not fry the psu if somehting bad happened.

the psu runs fine, i think that the psu is in good shape now.

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

i figured out what that extra circuitry on the bad fan controller was.

it was an overcurrent protection (OCP) circuit, put ont he same PCB as the fan controller.

I still have all of the OCP part ont he bad board... since the PCBs are identical, should i move the OCP parts over to the good controller the next time the computer is down?

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

well, i fixed it.

the bad one had some welltrend chip on it and 2 on board thermisistors in addtion to all the transistors... all I did was splice the HS thermistor and power wires to the board and moved the 5 pin header and 2 fan sockets over from the bad board, and that did it. the 5 pins go nowhere, it is just a retainer for the cable in the psu.

the fans spun up, so far the psu is keeping cool (only being used with one cpu, gotta find some athlon MPs).

[mockingbird]

Re: Ultra Xfinity 600w 5vsb mod

thermisistor?

some older fortrons (235/250W for sure) had add-on "noisekiller" PCBs screwed to the heatsink. might be worth a look if you have one kicking around.

very simple fan controller. 2pin 12V in, 2pin regulated out. thermistor can be desoldered and put somewhere other than ~2cm from the fan controller board.
I kinda have to admit i stole quite a few of these out of those old fortrons for other PSUs

AHA! So that was what that third brown wire coming from the PSU labeled "TH" was.

They still use that same PCB on their new stuff. It has one Teapo 25V 47uF cap on it IIRC that probably doesn't need to be replaced.

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

some older fortrons (235/250W for sure) had add-on "noisekiller" PCBs screwed to the heatsink. might be worth a look if you have one kicking around.

very simple fan controller. 2pin 12V in, 2pin regulated out. thermistor can be desoldered and put somewhere other than ~2cm from the fan controller board.
I kinda have to admit i stole quite a few of these out of those old fortrons for other PSUs

the thermistor is glued in a hole in the secondary heatsink... connected tot he board by wires.

tonight i will try the swap... and if i have the caps to do it, recap the new board. maybe simple is better?

[Scenic]

Re: Ultra Xfinity 600w 5vsb mod

some older fortrons (235/250W for sure) had add-on "noisekiller" PCBs screwed to the heatsink. might be worth a look if you have one kicking around.

very simple fan controller. 2pin 12V in, 2pin regulated out. thermistor can be desoldered and put somewhere other than ~2cm from the fan controller board.
I kinda have to admit i stole quite a few of these out of those old fortrons for other PSUs

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

It doesn't hurt. Doesn't the controller just take +12V from the PSU? I wonder how the controller decides when to increase/decrease the speed.

thermisistor?

[mockingbird]

Re: Ultra Xfinity 600w 5vsb mod

It doesn't hurt. Doesn't the controller just take +12V from the PSU? I wonder how the controller decides when to increase/decrease the speed.

[ratdude747]

Re: Ultra Xfinity 600w 5vsb mod

bad news. the fan controller is wasted.

that said, I do have a similar fan controller board (same PCB), but the similar one uses a bunch transistors and 2 caps, while the bad one uses an IC. also, the bad one has a 5 pin wire set to it, in addtion to the thermisitor wires and the yellow/white power wires, while the transistor one uses just the power and thermistor wires.

should i just swap and see?