Advice on a quiet 650-750w PSU

TerminatorUK

TerminatorUK

TerminatorUK

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Joined
19 Feb 2007
Posts
284
Hi folks,

I was wondering if any of you could recommend a power supply to fit in a Fractal Design Core 1000 mATX case which meets the following criteria (highest priority first):

- Very quiet (even under load)
- Rock solid stability wise
- Good brand / warranty
- Modular
- Single 12v rail


My budget target is £75 - could go higher but I'd need convincing! :)

Many thanks in advance :)
 
Hi guys, thanks for your suggestions.

It's for running a Ivy Bridge Core i5-3570k setup with a Radeon R9 280x (both over clocked).

My current 530w PSU cuts out and spontaneously resets when put under load which does not happen with a slightly less power hungry GeForce GTX 680.

I've also confirmed that the system is 100% stable when plugged into another rig's 1000w Zalman ZM1000-HP PSU and fully stable in a friend's rig running a Corsair TX850 PSU so I've definitely confirmed it is the PSU.

Happy with a 600w PSU too if you think it would cover the power draw.

Many thanks again for your assistance.
 
Haha, modular is definitely a nice to have with the limited space but isn't 100% required.

I'm tempted by the BeQuiet model (decent review here: http://www.kitguru.net/components/power-supplies/zardon/be-quiet-powerzone-650w-psu-review/2/) but this week only on OCuk, there is a Corsair CS Series Modular 650 W on offer (fair bit cheaper too) with a decent review here: http://www.techpowerup.com/mobile/reviews/Corsair/CS650M/1.html

Only complaint on that one is the ripple on the 12v rail (>50mv).

Would anyone recommend the later?
 
TerminatorUK said:
Haha, modular is definitely a nice to have with the limited space but isn't 100% required.

I'm tempted by the BeQuiet model (decent review here: http://www.kitguru.net/components/power-supplies/zardon/be-quiet-powerzone-650w-psu-review/2/) but this week only on OCuk, there is a Corsair CS Series Modular 650 W on offer (fair bit cheaper too) with a decent review here: http://www.techpowerup.com/mobile/reviews/Corsair/CS650M/1.html

Only complaint on that one is the ripple on the 12v rail (>50mv).

Would anyone recommend the later?
Click to expand...

between those 2 definitely the bequiet!
the corsair cs series are rubbish and that one doesnt do 650w it actually does 612w where as the bequiet does 648w,
the bequiet have better internals ie. built a lot better
 
Hi guys,

I've read another review of the Be Quiet! Power Zone 650W whereby the fan gets really noisy under higher loads:

http://uk.hardware.info/reviews/500...--750w-review-affordable-quality-noise-levels

...another 'real world' example in the Amazon.co.uk review here confirms it:

http://www.amazon.co.uk/product-reviews/B00EJCAU50/ref=sr_cr_hist_all?ie=UTF8&showViewpoints=1

This is giving me cold feet somewhat.

I've now started to consider a 3rd option (and pretty much talked myself out of the Corsair CS650) which is the Corsair RM650 which looks seriously good build quality wise, has complete silent operation up to 200w of load and then very quiet / consistent operation at higher loads.

It's a little more expensive but might suit what I'm looking for a bit better - any thoughts / comments on that model as another choice?

Many thanks again in advance! :)
 
If you're not planning to add a second graphics card you should get a lower wattage psu in the 450-550w range. Not only will it be cheaper, it will also be more efficient as your system is not likely to ever exceed 250w in real world situations even when overclocked.

I'd also recommend avoiding the RM750 in a system such as yours. The fan only turns on past 40% load, which yours will never reach. If you're gaming and the psu load is a constant 250w this will cause the internal temperature of the psu to rise very high affecting its lifespan. Corsair supposedly fixed this issue which forces the fan to turn on when it got too hot but this only prevents it from shutting itself off. It isn't designed for fully passive operation at constant moderate loads, it's very likely that it will be at its temperature limit most of the time with the fan turning on/off.
 
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Update - November 14, 2013:

In an effort to improve our products for all of our users, we have updated the RM750 and RM850 to resolve this issue. The thermistor circuit that is used to measure the temperature for the fan controller and OTP has been changed in all RM750 and RM850 PSU’s moving forward. An additional resistor has been added that will result in the fan turning on prior to the condition that causes the PSU to shut down in the event that temperatures exceed 45°C.

http://www.corsair.com/us/blog/rm750_and_850_thermal_issue/
 
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