Need a new PSU

[t3chguy]

Mite be a bit late, but I got an 850W for £65, new, it is modular;
It is the PowerCool Modular 850, quiet I can't hear it unless it is the only fan running, if you get a PSU that is double of what your PC uses then it will live a long time and at 50% load the PSUs are most efficient... So get a wall watt meter measure your pc on a random PSU at idle then double the wattage and there you go, bob's your uncle

[Pob255]

Wow you're trusting all that kit to a powercool you're a braver man than I

[Biscuit]

Its only the thing that transforms 115/230v AC power to 12/5/3.3V DC and provides it to every single device in your pc... why would need to spend more? [/sarcasm]

[Bochin]

I will use this post to ask my question instead staring the new one

I have really old (5yr) PSU (450W) it works perfectly... At least I think it is, never had a problem with it recently I have test it with the multimeter and all voltages seems ok +/-0.5%.

As I will now upgrade from Q6750 to 2500k with new motherboard and RAM I was wondering if my PSU will handle it. Is there any other test I can do to make sure it’s running ok?

[Biscuit]

What GPU will you be using with it?

[CAT-THE-FIFTH]

What model number is the PSU??

[Bochin]

What GPU will you be using with it?

HD5750 1GB as at the moment

What model number is the PSU??

Not sure can't see label as it's on the other side I will try to take it out tonight to have look.

[peterb]

Mite be a bit late, but I got an 850W for £65, new, it is modular;
It is the PowerCool Modular 850, quiet I can't hear it unless it is the only fan running, if you get a PSU that is double of what your PC uses then it will live a long time and at 50% load the PSUs are most efficient... So get a wall watt meter measure your pc on a random PSU at idle then double the wattage and there you go, bob's your uncle

No, modern good quality PSUs are at their most efficient at around 80% loading, but check the mfr's data/specifications. In practice the efficiency doesn't vary much between about 65% and 90% - at least not for a good well designed one.

[Bochin]

What model number is the PSU??

I have finally managed to find out what i got exactly

It's Jeantech 450W JN120F-450-AP.

I have found some old auction with it

http://www.ebay.co.uk/itm/Jeantech-4...-/320719695871

Other thing is efficiency of it which I can only guess is below poor? Not only because of its design but age as well?

All comments are more then welcome as from one hand i would like to save £70 required for new PSU but from other I don't want to spend £400 on new 2500k and find out it wont work stable on old PSU... :/

[CAT-THE-FIFTH]

I have finally managed to find out what i got exactly

It's Jeantech 450W JN120F-450-AP.

I have found some old auction with it

http://www.ebay.co.uk/itm/Jeantech-4...-/320719695871

Other thing is efficiency of it which I can only guess is below poor? Not only because of its design but age as well?

All comments are more then welcome as from one hand i would like to save £70 required for new PSU but from other I don't want to spend £400 on new 2500k and find out it wont work stable on old PSU... :/

I would check the PSUs in the £550 and £750 builds in the guide:

http://forums.hexus.net/pc-hardware/...er-2011-a.html

A 550W PSU will be fine for a single card setup and the 650W PSU for dual card setups. However,a decent 400W to 500W PSU will be fine with a Core i5 2500K and an HD5750 IMHO.

[Tim_UK1]

I have finally managed to find out what i got exactly

It's Jeantech 450W JN120F-450-AP.

I have found some old auction with it

http://www.ebay.co.uk/itm/Jeantech-4...-/320719695871

Other thing is efficiency of it which I can only guess is below poor? Not only because of its design but age as well?

All comments are more then welcome as from one hand i would like to save £70 required for new PSU but from other I don't want to spend £400 on new 2500k and find out it wont work stable on old PSU... :/

Personally I would invest in a new PSU - it doesn't seem like it was ever a top quality supply so it's probably only giving you 70% now of it's previously quoted output.

The electrolytic capacitors that are key to any psu are the most common electronic commonent to fail - even top grade ones have a very limited life if temps on high side, and often they won't fail dead but will cause wrong voltages before failing. I recently had trouble with my video PVR, checked the voltages and the 12volt line was giving out almost 18volts which had killed the drive. Fortunately in my case a quid on new capacitors and an old drive got the pvr repaired but imagine the cost to your pc bits and your data if this happened there.