MSI K7D Master & Powersupply Problems

[aftermath]

if u use a small case for a high spec system then the case temp will limit the psu's power out put.
from enermaxes site.

"0ºC ~25ºC for full rating of load, decrease to 80% rating of load at 40ºC, decrease to zero Watts O/P at 70ºC"

MY PSU sits on the base on the right of my server cube the cpus etc are on the left. im guessing my psu runs my system because the psu has cooler air.

id guess that all PSUs will be temperature sensitive in some way. maby not as much.

 

[wbedard]

Absolutely...

You're quite correct. While I'm not knowledgable enough in electronics to explain why that is, some PSU manufacturer's are quite honest about it. The following PDF, which highlights PCP&C's 510W PSU, breaks down how output power changes with temperature (and, of course, how their's fairs better than the competition):

http://www.pcpowerandcooling.com/maxpc/index_cases.htm

Going back to the topic of which rail modern CPUs (i.e. AMD Athlons) draw power from, there's another nice link on PCP&C's website that outlines how much power many devices draw and where they get it from. It further confirms that AMD Athlons primarily stress the 12V rail.

http://www.pcpowerandcooling.com/maxpc/index_cases.htm

This might be one of the better links to help people accurately estimate how much juice their systems (actual or prospective) will draw and how much PSU they will need to get.

Bill

 

[Jen]

Very good link and information from the PCP&C website. I tried out my 450 watt PCP&C this morning and its back working.

I hooked up all the cdroms / and hard drives to a AT powersupply leaveing only the 450 watt to power up the Motherboard / Cards / Video etc / Processors.

I still had trouble booting up as usuall. It took only a extra shut down so far to it to boot up correctly.

I think a call is in order to PCP&C and ask them why it is that this powersupply cant function properly. I can not believe that it cant power this computer up correctly



Jen