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as rock problem
- Thread starter shaun.woodall
- Start date
- Joined
- 13 May 2011
- Posts
- 15
well the original psu i had was in my computer for 5 yrs i upgraded the motherboard then a month later when i had money i brought a new 6 core processor now i just brought a 650w psu im just wondering if the motherboard could be faulty if my computer keeps turning off
It could be the motherboard but the PSU's you've used haven't exactly ruled them out as a problem.
You've gone from a 1.8GHz (dual core?) processor to a 6 core 2.8GHz processor. That's going to require more power.
If you had bought a decent PSU instead of that Win Power thing then that would have either cured the problem or at least eliminated the PSU from the equation.
Cheap PSU's and top end hardware don't go well together.
And you still haven't told us the full specification of your PC.
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- Joined
- 13 May 2011
- Posts
- 15
well weather its a £1 psu or £1000 its still kicking out the same watts im going to try taking memory out to rule that out and if its not that then there must be static on the motherboard i know its not the cpu i have upgraded the psu (obviously not a expensive one but it kicks the same power out ) i will also try disconecting dvd rw to rule that out but i think it could be the motherboard which only costs £30
No it isn't.
These cheap PSU's are well known for not supplying their stated wattage before blowing up.
Like I said it could be other things but you can't rule out the PSU.
Custom PC tested a £22 600W PSU. At 50% load (300W) the voltage on the 12V rail dropped to 11.03V, way below the ATX specification, and this would cause the PC to crash.
When trying to draw the full 600W from the PSU it refused to power up at all and started to emit a foul smell.
You've obviously got more faith in your £20 PSU than anyone else would have.
You've decided to go your own way so good luck with it.
Associate
- Joined
- 8 Mar 2006
- Posts
- 909
but not all watts are created equal.
A modern PC requires a high ampage on the 12v power rail. It doesn't need a lot of ampage on the 3 or 5 v power rails. Unfortunately, getting high amps on the low voltage rails is rather cheap, so crap PSUs will have huge amps on those rails and very few on the 12v rail.
So, you've bought a PSU that is great at running hard drives, but not good enough to run your CPU.
And let's not forget the damage that a cheap PSU cn cause when it blows..
In all fairness I don't think it's the PSU... I can't see bejewelled on Facebook maxing out his PSU causing 2 different PSU's to die (Although I do agree a good PSU is essential)
I used to work at a place that sold xpower PSU's, and they seemed not too bad, obviously not the best but I built plenty systems with them without a problem
I used to work at a place that sold xpower PSU's, and they seemed not too bad, obviously not the best but I built plenty systems with them without a problem
Soldato
- Joined
- 28 Dec 2009
- Posts
- 6,893
- Location
- Wales
I really don't understand why people skimp on psu's. It's like buying a ferrari then opting to stick a fords fiesta engine in it. The PSU should be your first and most serious consideration and work your way back from there.
** I wish to add there's nothing wrong with fiesta engines. I merely state that to draw an analogy.
** I wish to add there's nothing wrong with fiesta engines. I merely state that to draw an analogy.
Last edited:
- Joined
- 13 May 2011
- Posts
- 15
well i have taken out the memory and replaced them with different one and have also unplugged the dvd drive but it still does switch off it is the 95w cpu and it does mainly do it when playing bejeweled which does not take up much power i use my dvd drive all day but it does not switch itself off even though the dvd drive and the cpu are constantly working it would do in very rarly but it does it all the time when playing bejeweled so i do not think its the psu the graphics is built on to the motherboard its got 4 gb ram so i do think its the motherboard at fault
Associate
- Joined
- 14 Nov 2006
- Posts
- 117
i can safely say , and by no means am i a expert maybe once i was but i have been out the loop for a while pentium II and AMD K6 chips were my glory days. That you my friend dont have a clue take these guys advice they know what they are on about.
- Joined
- 13 May 2011
- Posts
- 15
i have got hold of a psu tester the readings were as follow
+5v=5.3v
+12v1=12.4v
+3v=3.4v
-12v=12.1v
+12v2=12.4v
5vsb=5.2
pg=320ms
so there for the psu is running fine
+5v=5.3v
+12v1=12.4v
+3v=3.4v
-12v=12.1v
+12v2=12.4v
5vsb=5.2
pg=320ms
so there for the psu is running fine
The voltage when not under load is irrelevant.
The fact that the 12V rails are within specification when not under load is irrelevant (though some are quite a way out from what you would expect on a quality PSU).
It's how many amps can be produced on those rails and what happens to the voltage as the output increases.
With cheap PSU's the voltage can soon drop as the load increases.
You should really use some form of punctuation and capitalisation. It's fairly difficult to read your posts.
I'm not having a go, I just feel you're likely to get more help that way.
- Joined
- 13 May 2011
- Posts
- 15
ok so i finally got £70 together to buy a corsair gs 600 brand new but surprise surprise my computer still switches off there for as i have been saying i think its the motherboard
- Joined
- 13 May 2011
- Posts
- 15
the ram has been tested the cpu has been changed im using the bios and speed fan to check temp so i have just forked out £70 for nothing when its the motherboard