Corsair RM 850X VS THERMALTAKE TOUGHPOWER GRAND 850W

[AceoFSpadesShri]

I wanted 850 watt power supply but i am confused. what psu i should buy..

i wanna buy Corsair but its fan not gonna spin until it’s drawing high power. so most of the time fan not gonna spin which is i think not good for psu. also i cant check that fan is working or not because there is not way to start it withought drawing high power.

THERMALTAKE have Smart Zero Fan so here fan will spin in zero noise.

i dont wanna use psu withought fan. i think spning fan is important for psu's cooling.

but i am not an expert so i want your help.

 

[Doctor Rob]

its actually better if the fan does not have to spin. Once the temps reach a certain point where things could start heating up etc.. then the fans start up. They do this for a few reasons. First noise (less of it) if the fan is not always moving. Also a big factor it keeps the power supply cleaner if there is no fan spinning to add dust to the power supply. I also think this is because most computer cases now have a separate path for the PSU air. like the last few computers I have built have the power supply at the bottom of the case drawing in air from outside the case instead of inside the case like older computers use to do. SO if you have a case that takes in fresh air for the PSU I would get one of those (I have an EVGA PSU now as my corsair (still under warranty and it had the always on fan) died / became unstable on me.

 

[geofelt]

850w is probably overkill for a psu unless you are looking at sli GTX1080ti cards.
Here is a handy chart for sizing a psu:
http://www.realhardtechx.com/index_archivos/Page362.htm
I have no problem overprovisioning a PSU a bit. Say 20%.
It will allow for a stronger future graphics card upgrade.
It will run cooler, quieter, and more efficiently in the middle third of it's range.
A PSU will only use the wattage demanded of it, regardless of it's max capability.


More efficient gold rated power supplies do not generate heat that requires a fan to run on low loads.
Be assured that the psu designers have this all figured out.
If you truly want a psu that makes noise with a fan spinning, buy an underpowered bronze rated unit(joking)

Best to look first to a quality unit.
Look for tier 1 or 2 on a list such as this:
http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
Corsair rm and thermaltake are more tier 3 units.

Look at the newly releases Seasonic focus line.
They are highly rated with long warranties.

 

[AceoFSpadesShri]

I am worried for PSU heat and also there is no way to check psu's fan is working or not.. i read some discussions where people are confused because there fan are not spnning in high load. they are confused because they dont know psu's fan is broken or not.there is no option to check this..
http://forum.corsair.com/v3/showthread.php?t=154606
http://www.tomshardware.com/answers/id-1979530/corsair-rm750-fan-spinning.html

i am thinking Thermaltake Toughpower Grand 850W Gold because this comes win fan buttion. so i can check fan is working or not..
Corsair is good companey but there is no way to check fan is working or not.

 

[geofelt]

Do not worry about a problem that is unlikely to exist.

1. A quality tier 1 or 2 psu will have protections against overheating in the event of a fan failure.
There are better quality units than toughpower.
2. Gold and higher rated power supplies will not normally turn the fan on under modest load.
3. A overprovisioned PSU will loaf under load and will not generate sufficient heat to need any active fan at all.
4. You can tell if a fan is spinning by dangling a piece of tissue at the exhaust point.
What you can't tell is if it SHOULD be spinning.
Even if you can feel heat at the exhaust, that does not mean that the fan is needed.
--------------bottom line--------------
No worries.

 

[AceoFSpadesShri]

there are not too many choices in India. i have only 2 choices Thermaltake toughpower RGB 850 or Corsair RM 850x .