dual power supplys for sli?

[vakanuva]

just wondering if anyone uses 2 power supplies for sli and could give any advice on it

[Sfekke]

It is possible but you'll need to jump the 24PIN ATX cable on the second one, it isn't a pretty sight and consider that SLI is becoming something that is just to show-off more then a value option.

[Stefan Payne]

6 minutes ago, vakanuva said:

just wondering if anyone uses 2 power supplies for sli and could give any advice on it

No, don't do such things.

 

But what components are you talking about?
What kind of SLI?

What Power Supplys?
What's the Rest??

[vakanuva]

im running a 750w corsair with just the one card but i just ended up with and another one that identical and the other cards been sitting out of the machine lol been dying to try it

 

[vakanuva]

two 780ti kingpins

[vakanuva]

but if i just wanted to test not really a long term solution could i use the second psu to power up the second card? if i jumper it off and use the switch at the back of the psu,

ive read before that i should have somthing else hooked up like an old harddrive is that true

[OrionFOTL]

The PSU powering the second graphics card should have DC-DC converters inside, since the graphics card would only pull 12V.

[vakanuva]

so what would the downsides be of trying this?

[OrionFOTL]

Two power supplies instead of just one will consume more power, be louder, and use more space. In addition, if the PSU for the graphics card is group regulated, the graphics card may be fed lower voltage than it should have, which affects its longevity.

[vakanuva]

there both corsair cx750m units

[OrionFOTL]

Then they are both DC-DC (aren't group regulated).

[vakanuva]

so should be it should be

okay?

 

[Amazonsucks]

48 minutes ago, vakanuva said:

so should be it should be

okay?

 

No. There are only risks and downsides to using two normal ATX PSUs like that. If you need more power, just get a single bigger one.

[17030644]

3 hours ago, OrionFOTL said:

Two power supplies instead of just one will consume more power, be louder, and use more space. In addition, if the PSU for the graphics card is group regulated, the graphics card may be fed lower voltage than it should have, which affects its longevity.

Can I ask you something? why did you stop updating orionpsudatabase?

 

I find that website useful

[17030644]

2 hours ago, vakanuva said:

so should be it should be

okay?

 

Like the people above said, there aren't many reasons of using two power supplies instead of just one good power supply

[ninbura]

Like others are saying using one PSU is more sensible... but the idea that running two is super risky seems a bit off. If you have an extra one lying around and don't want to buy a new one to accommodate the whole system you can very easily pick up an adapter to run two:
Add2PSU

Am I saying no one has ever run into issues doing this? Of course not, but most people don't have major issues when using the proper adapters.

Edit: According to community guidelines you aren't suppose to use the share button on Amazon / shortened links. I have updated the post to contain appropriate links, apologies for the inconvenience.

[OrionFOTL]

22 minutes ago, 17030644 said:

Can I ask you something? why did you stop updating orionpsudatabase?

I'm sorry about that, I just had a really busy schedule for the past year. I may decide to pick it up again if I get some more free time in a day for a longer period of time than just a few weekends.

[vakanuva]

so the devices similar to the add2psu would be the safest bet in a situation of dual powersupplies this is all just thinking though its always better to ask first before trying anytihng lol i just happened to have the other power supply about

[ninbura]

3 minutes ago, vakanuva said:

so the devices similar to the add2psu would be the safest bet in a situation of dual powersupplies this is all just thinking though its always better to ask first before trying anytihng lol i just happened to have the other power supply about

Generally people have the most success and least problems when using something like the add2psu, you could also just jump the second PSU with a paperclip and it should technically work. But that's usually when you start hearing stories about people accidentally burning their house down, still very unlikely that that would occur but most would recommend the add2psu if you are serious about using a second PSU.

I really wouldn't be overly worried about it regardless of which route you take.

[vakanuva]

alrighty thanks guys i understand way more on the subject then i had before really appreciate the input good discussion topic especially from different view points

 

[17030644]

4 hours ago, OrionFOTL said:

I'm sorry about that, I just had a really busy schedule for the past year. I may decide to pick it up again if I get some more free time in a day for a longer period of time than just a few weekends.

OK thanks