P5W DH Deluxe and Seasonic S12 500w Issue

[julian.day17]

The problem that you described in your first post is what the board does when its recovering from a bad overclock, it is the boards own way of saving you resetting the cmos with a jumper.

You should manually enter the ram timings and the sub timings, and remove any overclocks for now, see if it is stable at stock speeds.

your correct but the thing is i am not overclocking at all this is standard speeds. One of the first things i did was disabled the auto option changed to manual and set fsb to 266mhz memory to ddr2 1066 2.1 volts, and set 5-5-5-15-5 in memory settings. I still dont understand why when it recovers from a bad post you can reconfigure the bios and reboot and its fine until you switch off.
However now have changed power supply to seasonic 600W and all is fine.

The only other info i have is I have found out that there is 1 difference between PSU seasonic 600W has 18 amps on both rails where as the seasonic is 16amp on 1 and 17 amp on the other.
WOnder if there is an unofficial requirement to have 18 amp on both 12 rails on the board?

[julian.day17]

Might be worth reading this and this.

thanks really useful info here

[dancingmatt]

Might be worth reading this and this.

Ah, beat me to it. As I was reading down this thread I thought "it's the start-up efficient PSU issue I read on silentpcreview.com"

I can't work out whether the rails etc. you have are related to this problem, but I'm really confident this is where you're having a problem - particularly since it does work if you switch it on/off/on/off etc.

What you do about it, I dunno

DM

[dancingmatt]

(Duplicate post - removed, some sort of server problem)

[Gibb0N]

I tried a different psu in the motherboard and it still wouldn't post. It did a new thing though; when ever I turned it on it wouldn't turn off again. I had to turn it off at the psu. Weird... The mobo's been returned to Scan now anyway.

[julian.day17]

Seasonic tech support gave the following info

"This may be either a +5VSB overshoot or a minimum load issue on the system where you have connected the 500w unit.



Intel makes specifications on the +5VSB and the 12V minimum load and we have seen some systems not meeting these requirements. We do know that some M/B has an overshoot on the +5VSB which causes our psu not to start up as it thinks there is something wrong with the M/B and or the 12V not achieving the threshold of 1A load.



The difference you experience between the 500 & 600 watts units is because of either analog component tolerance or revision. We have made some changes to our power supplies where we went beyond the Intel specification in order to be more “compatible” so may I recommend that you change the PSU with Scan and see if the system configuration works better.



Technically, the M12 and the S12 are of the same design topology but the M12 is with much more bells and whistles. One very important feature is the dynamic load on the 12V rail which helps the system overcome any 12V loading if the 1A minimum load is not met. Also it has a 3% tolerance on the 12V rail instead of the standard 5%. Benefits such as 80Plus are helpful and as well, the acceptable range of the +5VSB has been widened to beyond Intel specification in order to be more accommodating to M/Bs.



Will it be possible for you to change to M12-500? This will give you the wattage you need and allows you to build a much cleaner system without all the extra cables blocking airflow.



I am sorry for any inconveniences and if you have further questions, please let me know."

[Gibb0N]

Motherboard was tested by scan and found to be not faulty...

think I'm gonna have to try returning the psu then...

[Steyr]

Might be worth reading this and this.

With regards to the info in these links, would I have problems booting a P5W using LN11603 600w Seasonic S12-600 SLi Ready Silent PSU 2xPCI-E 4xSATA 120mm Fan ATX1.3/2.01 ?

[Steyr]

From the first link posted

..Seasonic has quietly implemented an active circuit that automatically inserts enough of a load so that the 12V line always sees the minimum load, at least, but then this extra resistance is removed when the load gets higher, so that turn-on is never a problem, and high efficiency is maintained at normal and high power operation.

Which Seasonic models? I believe all the current sleeved output cable S12s, the S12-80+ models and the soon to come M12s.

Does LN11603 have this active circuit implemented?

[dancingmatt]

With regards to the info in these links, would I have problems booting a P5W using LN11603 600w Seasonic S12-600 SLi Ready Silent PSU 2xPCI-E 4xSATA 120mm Fan ATX1.3/2.01 ?

It's what I'm using with my P5W And no problem with start-up so far. But a note - if you are using a P180b case, you'll need extension leads for the 24-pin and 4-pin ATX connectors since they are at the very top left of the P5W DH Deluxe board, and in the P180b case your PSU is right at the bottom.

I have, however, had my PC reboot itself with no warning on a few occasions. I don't know if this is related to this PSU (and a different problem from the start-up thing). If my CPU was getting too hot, it would throttle the speed down right? Not just reboot the PC?

DM

[Steyr]

It's what I'm using with my P5W And no problem with start-up so far. But a note - if you are using a P180b case, you'll need extension leads for the 24-pin and 4-pin ATX connectors since they are at the very top left of the P5W DH Deluxe board, and in the P180b case your PSU is right at the bottom.

Thanks for the headsup, but I already got that covered , got LN10422 Silverstone SST-PP01 ATX PSU Cable Extension Adaptor Kit sitting in my basket. Just waiting for the P5W to come in stock before I put my order through though.

I have, however, had my PC reboot itself with no warning on a few occasions. I don't know if this is related to this PSU (and a different problem from the start-up thing). If my CPU was getting too hot, it would throttle the speed down right? Not just reboot the PC?

DM

Sounds strange, whats the rest of your rig?

[5aboy]

well ive been having issues with my seasonic too, and i am going spare - you do not spend £100 on a PSU for it to not work with the latest newest motherboards - these are supposed to be able to run sli systems, and are actually wonderfully fine psu's - just theyre having weird startup issues in some setups.

just hope the guys at scan do something for me....swapping to m12-600 i hope is an option for me, as ill gladly pay the difference.

i did send off for rma today, who knows whatll happen, and if scan need me to lug over the heavy psu via royalmail, or if they will do an exchange via the couriers? never had to rma anything before, this is going to be quite important, im thinking!

[Steyr]

well ive been having issues with my seasonic too, and i am going spare - you do not spend £100 on a PSU for it to not work with the latest newest motherboards - these are supposed to be able to run sli systems, and are actually wonderfully fine psu's - just theyre having weird startup issues in some setups.

just hope the guys at scan do something for me....swapping to m12-600 i hope is an option for me, as ill gladly pay the difference.

i did send off for rma today, who knows whatll happen, and if scan need me to lug over the heavy psu via royalmail, or if they will do an exchange via the couriers? never had to rma anything before, this is going to be quite important, im thinking!

Out of interest, whats your system spec? If the Seasonic s12 series are problems, I might consider changing my order as I don't want to mess about returning goods etc, as as I understand it you have to cover all the costs involved?

[5aboy]

opteron 165
2x512mb BH5
DFI SLI-DR
7800GT
2x320gb HDD
1x optical
1x sb audigy2zs
some fans.

thats all, its something to do with minimum loads and stuff - i now hear that certain dfi configurations have issues with it, and that seasonic seem to realise that the issue exists - hence the revision A3 that was supposed to fix it. i have rev A2 - all the new ones i understand are top-notch working perfectly.