Abit IP35/Enermax Infiniti 720w problem

[J Haulass]

Hi all,

I hope someone here can help me, here are my system specs:-

Abit IP35
C2D E6750
2GB Corsair XMS 6400
2*Hitachi deskstar 160GB in raid0
Samsung DVDRW
8800GTX

Until recently I was using a cheap Atrix PSU with no problems at all except for the IP35's dual boot quirk which I believe is common to these motherboards and not an actual fault.
After being told numerous times that a good quality PSU is essential for powering a half decent system, I decided to invest in an Enermax Infiniti 720w, based on the excellent reviews, but after installing said PSU I hit a bit of a snag.

When I hit the power button, the fans spin and the lights come on for roughly 5 seconds, then everything shuts down for 2 seconds, then back on for 5, and so on and so forth in an endless cycle.
I tried the cmos reset which is compulsory on these boards when the power is disconnected but to no avail, tried removing all the components and replacing them one by one but still nothing. Reinstalling the old PSU however, made the system run fine,(after the cmos reset of course).
Thinking my Infiniti may be faulty, I connected it up to my girlfriends machine and hey presto! Everything is fine, so neither my system nor the PSU is actually faulty so why won't they work together?

Using my rather inadequate powers of deduction I can only think that it has something to do with the dual boot issue, maybe, as the video isn't triggered there isn't sufficient power being drawn so the PSU shuts down, I don't know.
There is a BIOS update available for my motherboard that stops the dual booting but it apparently still does it the very first time you power up so I am not sure this will help.

If anyone has any experience of this or knows of a workaround, please let me know, it will be much appreciated.

Jon

[Thorsson]

I believe that some of these PSUs have compatibility issues with some IP35s. There's no way round going back to your PSU supplier and telling them that, and getting a replacement. I'd probably go for a different PSU.

[YOYOtech - Mark]

hi there there have been a number of compatibility issue between motherboard / graphics card and power supply.....
i think the enermax is just not compabailtiy with the ip35 (something to do with the way it boots)

i would try the corsair range or the coolermaster range - both work with the ip35 boards with no problems...

thanks
mark
YOYOtech

[J Haulass]

Thanks for the advice guys but I can't take the PSU back as I got it used off ebay, however, I have discovered a workaround that may be of some use to anyone else with similar problems.

I read on here that sometimes these things will boot after many cmos resets so I decided to make myself a clear cmos reset switch using a couple of simple on/off rocker switches and the cable for an internal speaker and just splitting the wire from the middle clear cmos pin. This meant I didn't have to lever out the battery or remove my graphics card everytime I wanted to clear cmos.

I cleared the cmos 8 times with no luck, on the 9th time however, it booted normally, problem then was that it wouldn't shut down so out came the power cord again, and then back to the original problem.

After many frustrating hours of trying I found that if you follow a certain procedure, it seems to work properly everytime.

1. Remove power cord, turn off normal cmos jumper switch and turn on clear cmos jumper switch.
2. Leave for at least 10 seconds.
3. Turn off clear cmos jumper switch.
4. Insert power cord and turn on PSU.
5. Whilst holding down the power button on the case, turn on normal cmos jumper switch.
6. Hopefully, Robert is your mother's brother.

This method has worked for me 5 times now and hopefully others will be able to use it too.

[Blitzen]

Originally Posted by J Haulass

Thanks for the advice guys but I can't take the PSU back as I got it used off ebay, however, I have discovered a workaround that may be of some use to anyone else with similar problems.

I read on here that sometimes these things will boot after many cmos resets so I decided to make myself a clear cmos reset switch using a couple of simple on/off rocker switches and the cable for an internal speaker and just splitting the wire from the middle clear cmos pin. This meant I didn't have to lever out the battery or remove my graphics card everytime I wanted to clear cmos.

I cleared the cmos 8 times with no luck, on the 9th time however, it booted normally, problem then was that it wouldn't shut down so out came the power cord again, and then back to the original problem.

After many frustrating hours of trying I found that if you follow a certain procedure, it seems to work properly everytime.

1. Remove power cord, turn off normal cmos jumper switch and turn on clear cmos jumper switch.
2. Leave for at least 10 seconds.
3. Turn off clear cmos jumper switch.
4. Insert power cord and turn on PSU.
5. Whilst holding down the power button on the case, turn on normal cmos jumper switch.
6. Hopefully, Robert is your mother's brother.

This method has worked for me 5 times now and hopefully others will be able to use it too.

As said above, there is a snag with the Infiniti's and some motherboards. The Liberty range is fine however.
(If you want to sell it let me know)