Author

Topic: PSU max load (Read 225 times)

legendary
Activity: 4354
Merit: 9201
'The right to privacy matters'
February 08, 2018, 03:45:57 PM
#12
Consumer PSUs are not meant (not made for) to be run at 70-100% capacity 24/7. That said it doesn't mean they won't. I try not to do that. For example, for my 900 watt systems I generally use 2x 750 watt power supplies.

Also, at 90% capacity you will use more electricity as they start to lose efficiency when you pass 50-70% <- I admit I don't know the exact number.

I highly recommend you (and everyone) install a smoke detector close to their rigs just in case anything goes wrong.

Every atx I run at 80 % or higher dies young two or three years not five or seven or ten years like their warranties are.
hero member
Activity: 2604
Merit: 607
February 08, 2018, 02:03:28 PM
#11
The best answer is a 2nd PSU.  Until you get another one, may want to decrease TDP on the GPUs so you are not over 400W.
member
Activity: 247
Merit: 59
February 08, 2018, 09:48:07 AM
#10
Consumer PSUs are not meant (not made for) to be run at 70-100% capacity 24/7. That said it doesn't mean they won't. I try not to do that. For example, for my 900 watt systems I generally use 2x 750 watt power supplies.

Also, at 90% capacity you will use more electricity as they start to lose efficiency when you pass 50-70% <- I admit I don't know the exact number.

I highly recommend you (and everyone) install a smoke detector close to their rigs just in case anything goes wrong.
newbie
Activity: 12
Merit: 0
February 08, 2018, 09:16:02 AM
#9
I've read you don't want to go over 80% generally.

If you're at or near that limit I'd be looking at upgrading the PSU.

I agree with this advice 80%, also be aware of your PSU efficiency rating as it will have a bearing on your actual electricity costs over time
http://www.tomshardware.co.uk/forum/338726-28-differences-bronze-silver-gold-platinum-certificates
member
Activity: 294
Merit: 16
February 08, 2018, 09:05:23 AM
#8
I've read you don't want to go over 80% generally.

If you're at or near that limit I'd be looking at upgrading the PSU.
newbie
Activity: 59
Merit: 0
February 08, 2018, 08:13:28 AM
#7
Very high load, it is risky. PSU after using for long loss their power because capacitors dry up

It depends on the quality of the PSU. For the OCZ 1250W, I run it at 70% capacity to get high efficiency.
newbie
Activity: 25
Merit: 0
February 08, 2018, 07:51:42 AM
#6
That depends on the quality of your PSU. Top tier PSU would be able to handle that load, although I won't be using or recommend anybody to put that load into a PSU since you're going to lose the efficiency which most PSU have their peak efficiency on 50% - 70% load. Using 2 psu's instead would be a safer choice. Just my 2c

Maybe if I undervolt it. Would that help?
newbie
Activity: 7
Merit: 0
February 08, 2018, 07:48:42 AM
#5
90% load is high .. keep it below 70% i think
newbie
Activity: 90
Merit: 0
February 08, 2018, 07:45:12 AM
#4
PSU have their peak efficiency on 50% - 70% load.
I recommend you stay between these values.
full member
Activity: 714
Merit: 104
February 08, 2018, 07:42:58 AM
#3
Very high load, it is risky. PSU after using for long loss their power because capacitors dry up
sr. member
Activity: 299
Merit: 256
February 08, 2018, 07:33:12 AM
#2
That depends on the quality of your PSU. Top tier PSU would be able to handle that load, although I won't be using or recommend anybody to put that load into a PSU since you're going to lose the efficiency which most PSU have their peak efficiency on 50% - 70% load. Using 2 psu's instead would be a safer choice. Just my 2c
newbie
Activity: 25
Merit: 0
February 08, 2018, 07:23:43 AM
#1
Hello. Is having 90% psu load safe while mining? I would like to add AMD R9 390 to my pc which already has rx 560 in it. I checked power load on be quiet site and it says that my pc will consume 481W, i have 500W psu and im not sure if its safe
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