what PSU can i use ? | Bitcointalksearch.org

deadsix

hero member

Activity: 751

Merit: 517

Fail to plan, and you plan to fail.

Quote from: aliitp2 on October 17, 2021, 06:48:19 AM

It’s funny ur saying that…

My previous psu been running for months with 1000w only 🤔🤔🤔

It IS built to run upto a 1000w so it should run, but over time it will degrade. I have had tens of Gold rated 1000W PSUs burn even though I was loading them to 850w or so. If you're lucky it may run for even a year, but youre running a high probability of failure - just reduce one GPU and be safe.

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I know sata is usually not recommended but will I get away with them for my setup or I will burn or damage something t ??

But thanks for ur comments let me see how can I source a psu where u live…

Little to no difference between Sata or Molex as long as you are pluggin git directly into the riser for lower load GPUs, just dont use any pcie/sata/molex adapters that came with the riser - those will burn.

aliitp2

member

Activity: 260

Merit: 46

Quote from: deadsix on October 17, 2021, 06:19:28 AM

Quote from: aliitp2 on October 16, 2021, 06:30:35 PM

so its ok to use the Molex 4-pin cables to power the risers instead of 6-pin cables and reserve those for the cards only ?

Yes, its fine unless its a high power draw GPU ( in your case, the 3060ti's are safer to use with Molex powered risers than the 3070's, so use the 1 remaining pcie slot with a splitter to connect the two 3070 risers to them)

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can i use the same cable strand for multiple risers or one riser per cable ?

When using molex and sata, use only one strand per riser ( even if the strand has 3-4 connectors )

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finally i did the math for your last mentioned point: 5 cards x 135~w per card (of course they are power limited) = 675 W total | and 75w per riser x 5 risers = 375 W
total power needed 1050 W
are you saying i can Not use a 1000w PSU or even a 1050w PSU for 24x7 mining ??

Your math isnt entirely accurate, risers dont always consume 75w thats generally the rated maximum. Figure out a way to measure accurate total power consumption at the wall where you plug the psu in (buy a power meter or use an household appliance stabaliser etc) for accurate measurement, and decide on PSU wattage accordingly. For your 5 GPU's, the risers should be consuming no more than 35-40W each, so the total should be 280W max for the risers, and 675W for the GPUs, making the total 955W which is dangerously close to the PSU's limit, and will likely cause failure in a few days of running. Also remember PSU is rated at 1000W on 240v, on 120v it can only manage about 750W.

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one last weird question, are other 4-pin Molex Cables from other PSUs exchangeable ? not sure about this PSU how many Molex CABLES it comes with TBH and i am extremely limited on my options here in Turkey:
https://www.sinerji.gen.tr/powerboost-1000w-warrior-80-gold-tam-moduler-guc-kaynagi-p-40405

No, every manufacturers cables may be different and its high risk. Stick to known brand PSU's like Corsair, EVGA, Antec, Coolermaster etc and make sure you get Gold rated or above. Thier product pages list all the cables they come with.

It’s funny ur saying that…

My previous psu been running for months with 1000w only 🤔🤔🤔

Sadly however this PSU got only one molex cable but 3x sata cables

https://cougargaming.com/products/psus/gex1050/

I know sata is usually not recommended but will I get away with them for my setup or I will burn or damage something t ??

But thanks for ur comments let me see how can I source a psu where u live…

deadsix

hero member

Activity: 751

Merit: 517

Fail to plan, and you plan to fail.

Quote from: aliitp2 on October 16, 2021, 06:30:35 PM

so its ok to use the Molex 4-pin cables to power the risers instead of 6-pin cables and reserve those for the cards only ?

Yes, its fine unless its a high power draw GPU ( in your case, the 3060ti's are safer to use with Molex powered risers than the 3070's, so use the 1 remaining pcie slot with a splitter to connect the two 3070 risers to them)

Quote

can i use the same cable strand for multiple risers or one riser per cable ?

When using molex and sata, use only one strand per riser ( even if the strand has 3-4 connectors )

Quote

finally i did the math for your last mentioned point: 5 cards x 135~w per card (of course they are power limited) = 675 W total | and 75w per riser x 5 risers = 375 W
total power needed 1050 W
are you saying i can Not use a 1000w PSU or even a 1050w PSU for 24x7 mining ??

Your math isnt entirely accurate, risers dont always consume 75w thats generally the rated maximum. Figure out a way to measure accurate total power consumption at the wall where you plug the psu in (buy a power meter or use an household appliance stabaliser etc) for accurate measurement, and decide on PSU wattage accordingly. For your 5 GPU's, the risers should be consuming no more than 35-40W each, so the total should be 280W max for the risers, and 675W for the GPUs, making the total 955W which is dangerously close to the PSU's limit, and will likely cause failure in a few days of running. Also remember PSU is rated at 1000W on 240v, on 120v it can only manage about 750W.

Quote

one last weird question, are other 4-pin Molex Cables from other PSUs exchangeable ? not sure about this PSU how many Molex CABLES it comes with TBH and i am extremely limited on my options here in Turkey:
https://www.sinerji.gen.tr/powerboost-1000w-warrior-80-gold-tam-moduler-guc-kaynagi-p-40405

No, every manufacturers cables may be different and its high risk. Stick to known brand PSU's like Corsair, EVGA, Antec, Coolermaster etc and make sure you get Gold rated or above. Thier product pages list all the cables they come with.

miner29

full member

Activity: 1264

Merit: 138

Quote from: aliitp2 on October 16, 2021, 06:30:35 PM

Quote from: deadsix on October 16, 2021, 04:26:42 PM

You would need to use 7 of the pcie ports just on the GPU's, so how are you powering the risers???
Splitters are fine to split ONE pcie port to two for connecting two risers to each, but anything more than that is begging for trouble.

Ideally you need to have enough pcie ports on the psu to power all GPUs and risers. In a pinch you can use molex powered risers, but do not use any molex-pcie adapters that come with risers, those are a fire hazard.
As a general rule of thumb, do not exceed 80% of the rated load on the PSU for long term operation, 75% if you dont have adequate cooling.

thank you

so its ok to use the Molex 4-pin cables to power the risers instead of 6-pin cables and reserve those for the cards only ?

can i use the same cable strand for multiple risers or one riser per cable ?

finally i did the math for your last mentioned point: 5 cards x 135~w per card (of course they are power limited) = 675 W total | and 75w per riser x 5 risers = 375 W

total power needed 1050 W

are you saying i can Not use a 1000w PSU or even a 1050w PSU for 24x7 mining ??

i must admit the two models i have my eyes on are:
https://www.vatanbilgisayar.com/pc-toplama/cougar-gex1050-1050w-80plus-gold-guc-kaynagi.html
or
https://www.itopya.com/powerboost-warrior-1000w-80-gold-full-moduler-12cm-fanli-atx-psu/

due to local availability,

one last weird question, are other 4-pin Molex Cables from other PSUs exchangeable ? not sure about this PSU how many Molex CABLES it comes with TBH and i am extremely limited on my options here in Turkey:
https://www.sinerji.gen.tr/powerboost-1000w-warrior-80-gold-tam-moduler-guc-kaynagi-p-40405

kindly advise need to decide soon, thanks...
thanks,

Be careful using another cable with a psu. You will need to check the wire size and also the pinouts from the original to the other cable. You can usually buy additional cables from the psu maker / amazon / ebay. If you do borrow another psus cable just make sure the pinout is exactly the same. Use a voltage meter to make sure they wired the same…and if you dont follow this then get somebody who does or get a set from the maker.

aliitp2

member

Activity: 260

Merit: 46

Quote from: deadsix on October 16, 2021, 04:26:42 PM

You would need to use 7 of the pcie ports just on the GPU's, so how are you powering the risers???
Splitters are fine to split ONE pcie port to two for connecting two risers to each, but anything more than that is begging for trouble.

Ideally you need to have enough pcie ports on the psu to power all GPUs and risers. In a pinch you can use molex powered risers, but do not use any molex-pcie adapters that come with risers, those are a fire hazard.
As a general rule of thumb, do not exceed 80% of the rated load on the PSU for long term operation, 75% if you dont have adequate cooling.

thank you

so its ok to use the Molex 4-pin cables to power the risers instead of 6-pin cables and reserve those for the cards only ?

can i use the same cable strand for multiple risers or one riser per cable ?

finally i did the math for your last mentioned point: 5 cards x 135~w per card (of course they are power limited) = 675 W total | and 75w per riser x 5 risers = 375 W

total power needed 1050 W

are you saying i can Not use a 1000w PSU or even a 1050w PSU for 24x7 mining ??

i must admit the two models i have my eyes on are:
https://www.vatanbilgisayar.com/pc-toplama/cougar-gex1050-1050w-80plus-gold-guc-kaynagi.html
or
https://www.itopya.com/powerboost-warrior-1000w-80-gold-full-moduler-12cm-fanli-atx-psu/

due to local availability,

one last weird question, are other 4-pin Molex Cables from other PSUs exchangeable ? not sure about this PSU how many Molex CABLES it comes with TBH and i am extremely limited on my options here in Turkey:
https://www.sinerji.gen.tr/powerboost-1000w-warrior-80-gold-tam-moduler-guc-kaynagi-p-40405

kindly advise need to decide soon, thanks...
thanks,

JayDDee

full member

Activity: 1386

Merit: 220

First count the pinouts on the PSU's PCIe ports and wires in the cables. Both should be 8, if not
you have a cheap PSU. 8 conductors can handle 300W, if only 6 the limit is around 200W.
Splitting is not a problem if you use good quality splitters and stay within limits. Avoid multiple
splitters on a single cable.

Spreading the load to more cables by using the Molex cables is also no problem with the same caveats.
Sata cables should be used with caution or avoided completely.

A good clue to splitting potential is if 8 pin cables and 2x8 pin cables can use the same PSU port. If so
there is no harm in splitting an 8 pin to 2x8 pin.

deadsix

hero member

Activity: 751

Merit: 517

Fail to plan, and you plan to fail.

You would need to use 7 of the pcie ports just on the GPU's, so how are you powering the risers???
Splitters are fine to split ONE pcie port to two for connecting two risers to each, but anything more than that is begging for trouble.

Ideally you need to have enough pcie ports on the psu to power all GPUs and risers. In a pinch you can use molex powered risers, but do not use any molex-pcie adapters that come with risers, those are a fire hazard.
As a general rule of thumb, do not exceed 80% of the rated load on the PSU for long term operation, 75% if you dont have adequate cooling.

FP91G

legendary

Activity: 1610

Merit: 1026

If you call PCI-E ports an 8-pin connector,
and your reirers are powered by 6 pins, then in your case I don't see any problems.
Because your video cards do not consume more than 140 watts and there should be no problems with overheating of the contacts.
I use GTX 1080 video cards with 4 pin raisers, and they consume 150-160 watts.
I would not change anything if everything works stably and the splitter contacts do not overheat.

aliitp2

member

Activity: 260

Merit: 46

more like what PSU can i get away with ??

I have been using a premium 1000w PSU with 8x PCI-E ports

my rig consists of 5x risers (gpurisers.com)

3x 3060 Ti *single 8 pin*
2x 3070 *dual 8 pin*

my main worry is not the wattage
but the amount of PCI-E ports in the PSU to accommodate that many PCI-E Cables,

i admit i used all 8 PCI-E ports on that old PSU

and am using 5x PCI SPLITTERS due to the lack of pci-e interfaces

i was wondering can i get away powering on the risers with the 4-pin molex ports in stead of PCI-E to save on the PCI-E Cables and slots ?

i cant find many options of PSU (((WHERE I LIVE))) with 8 pin pci-e ports,

and is it fine to run that many cards on a single PSU (of course they are consuming less wattage than PSU power), some advised against that not sure why !...

plz any help truly appreciated as i must get a PSU ASAP !...

thanks,

Topic: what PSU can i use ? (Read 88 times)