Do molex connectors come from the +12V on a psu?
- Thread starter GJS1
- Start date
hey, oh no i meant which rail do they draw from?
Huh?
The 12V connectors draw from the 12V and the 5V connectors draw from the 5V, unsurprisingly.
It depends on which psu you have in mind.
For my one, every 12V output is drawn from a common source, as it is a "single rail" psu. For others you have mixtures, perhaps one line for the cpu, two for graphics cards and one for molex. Since we don't know which psu you have, or what current you want to draw from each line, we can't help you.
For my one, every 12V output is drawn from a common source, as it is a "single rail" psu. For others you have mixtures, perhaps one line for the cpu, two for graphics cards and one for molex. Since we don't know which psu you have, or what current you want to draw from each line, we can't help you.
oh i was wondering, i don't have it but it's basically for cooling components so i was wonderng woudl a single rail psu adaquatly power heavily loaded molex connectors and satas?
What do you mean? Do you just want to run some fans off the psu molex? If so almost any psu will cope with that, and any which won't you really don't want to run a computer with.
The single rail on my one is rated for 64A, so 760W. Many, many fans. This is relatively unusual though, and the single rail vs multiple rail only really matters if you're at risk of drawing obscene currents through one of them. Are you trying to pick a power supply to run a new computer, or one to use for a cooling system but not a computer?
The single rail on my one is rated for 64A, so 760W. Many, many fans. This is relatively unusual though, and the single rail vs multiple rail only really matters if you're at risk of drawing obscene currents through one of them. Are you trying to pick a power supply to run a new computer, or one to use for a cooling system but not a computer?
no, it's not that. I will have 2 enermax galaxy 1.25kw psus , and then this to run some cooling. All i want to know is if molex draw from +5V or +12V
You are aware that no single desktop machine in existence could need 2.5kW of power, and that you cannot simply strap power supplies together if one is insufficient? This is not to say that you can't use multiple supplies simultaneously for one machine, just that doing so is more complicated than soldering the wires together. The two psus will disagree on what "earth" is for one thing.
As stated above, molex cables have a 12V, a 5V and two earth lines. So molex devices could draw from either or both of these. Which molex device do you have in mind?
It would be a really good idea to outline the rest of your plans here, as I have a strong suspicion there will be areas you've overlooked. Your call of course.
As stated above, molex cables have a 12V, a 5V and two earth lines. So molex devices could draw from either or both of these. Which molex device do you have in mind?
It would be a really good idea to outline the rest of your plans here, as I have a strong suspicion there will be areas you've overlooked. Your call of course.
the machine I am building will come close
The only way I know of to come even close to 2.5kW power draw in a single machine is using peltiers. Based on the subject of this thread I'm confident in saying you're not using peltiers.
What specification do you have in mind?
What specification do you have in mind?
Nope i wasn't going to use TEC, I'm thinking about what (opefully) the spesification we're going to get from the gt300 line of cards, hoping that it will be possible to have 4 (like the classifids) and a physx (if they will run). The coolant from the Gpus will be run through rads and then a chiller and enter the loops at 4 degrees celcius (I think it would be too trouble some dealing with sub zero on so many cards). Now, still in debating is the cpu cooling, I'm concidering building a single stage phase evaporator although this isn't confirmed. The chiller and phase of course won't be off the 1.25kw psus, but by the time they're nicely overclocked they will probally be using a good ammount of the psus potential. Talking about someone saying you can't rn multiple psus - i thought that but lots of people run them.
The thing with phase is i will have to build a nice changer because i'v seen people on older retail units hitting the same as a good liquid cooling setup :S
so that's why it isn't confirmed. This also depends on the overclocability of new intel chips
(hopefully an i9 
)HDDs shoulnd't use to much power as i will probally have 3 SSDs in raid 0, and then (not sure on size) but a few liquid cooled 3.5" 7.2 k drives, don't think i will need velociraptors - the 3.5 " drives willl be on a passive rad
woot
by the time it's running I'm thinging it will probally be up at around 2kw on the hardware, 350 ish on the chiller (mains) and probally about the same on the phase, maby a bit more.
BTW this will be in my heavily modded case, if you're wondering (just assuming the cards aren't over 14" long)
