airflow Can using a Power Supply as an extra exhaust decrease temperatures?

[TheFluffyFish]

Is this safe to do and has anyone tried this?

case = Fractal Desgin Meshify C with 3 front intake fans + 1 120mm exhaust and one 240mm rad exhaust,

Powersupply = coolermaster Masterwatt 750W bronze

[.Apex.]

19 minutes ago, TheFluffyFish said:

Can using a Power Supply as an extra exhaust decrease temperatures?
Is this safe to do and has anyone tried this?

It would but it's difficult to know how effective that is, and it's safe as long as you have a decent power supply that isn't being overloaded

[Mira Yurizaki]

The original ATX design was such that the PSU was supposed to do this. So yes, it's fine. The side effect however is the PSU will get warmer if you stress the hardware and this will decrease the PSU's overall effectiveness. But unless you got a PSU that just makes enough power, this isn't something to really worry about.

[Mezoxin]

1 minute ago, Mira Yurizaki said:

The original ATX design was such that the PSU was supposed to do this. So yes, it's fine. The side effect however is the PSU will get warmer if you stress the hardware and this will decrease the PSU's overall effectiveness. But unless you got a PSU that just makes enough power, this isn't something to really worry about.

back then PSU's had 2 fans 

[.Apex.]

5 minutes ago, Mezoxin said:

back then PSU's had 2 fans 

Actually most of them had 1 smaller Fan, a 6cm one instead of the usual 12cm used in today's PSUs.

[Mezoxin]

23 minutes ago, _Syn_ said:

Actually most of them had 1 smaller Fan, a 6cm one instead of the usual 12cm used in today's PSUs.

you maybe right since it was cheaper to just have one fan 

 

and it is still a viable option in ATX2.2 

Quote

The ATX Specification offers two options for venting between the power supply and the system interior:

• The venting shown in Figure 8 provides the most effective channeled airflow for the power supply itself, with little regard for directly cooling any system components. This venting method is nearly always used in conjunction with a fan that exhausts out the rear of the power supply.

• The venting shown in Figure 9 allows designers to more directly couple the power supply airflow to system components such as the processor or motherboard core, potentially cooling all critical components with a single fan. Both the power supply fan location and direction may vary in this case. The trade-off is usually one of reduced system cost versus narrower design applicability

I wouldnt prefer this method though specially with high end systems  since PSU fans are one the most probable components  that will fail first in a PSU , so no need to overload it 

[Bombastinator]

The problem is getting the PSU to actually do it. (I.e run constantly or according to the needs of case air temp) PSU fan controllers are independent of the motherboard, and have different heat controls.  Many PSUs could in theory do it but won’t in practice.

[Guest]

1 hour ago, _Syn_ said:

Actually most of them had 1 smaller Fan, a 6cm one instead of the usual 12cm used in today's PSUs.

Actually, they had 80mm fans and the more common fan used today is 140mm.

 

1 hour ago, TheFluffyFish said:

Is this safe to do and has anyone tried this?

What case? 

 

What PSU?

[Sir0Tek]

2 hours ago, TheFluffyFish said:

Is this safe to do and has anyone tried this?

It depends, and yes, I usually build systems like this, with using the cpu-fan as a separate intake as well. But primarily they're not designed for gaming or have to face extreme overclock.

[TheFluffyFish]

55 minutes ago, jonnyGURU said:

Actually, they had 80mm fans and the more common fan used today is 140mm.

 

What case? 

 

What PSU?

Meshify Fractal Design C and CoolerMaster MWE 750W bronze

[Tristerin]

If its bottom mounted it will just be fighting with your axial or blower GPU.  Best to allow the bottom mount to be used as its own intake and exhaust for the PSU if it has that option (grill on the bottom) if not I would DIY the bottom so I could still correctly bottom mount my PSU.