GTX 580 needs two 8-pin, only got one 8 and one 6.

[KapteinFruit]

My old 5870 decided to retire earlier this week. The fan started making this really loud rattling noise that was ear deafening. So since my brother is currently in Indonesia I called him and asked if I could barrow his Asus GTX 580 CU II card and he said aight. Anyway, I picked the card up today and when I got home I noticed that I don't have two eight pin connectors on my old Corsair VX 550W. I think my PSU will be sufficient enough from what I've read. My brother is using my Enermax Revolution 85+ 1250W PSU since his 550W wasn't good enough. But that's way off topic, my question is, do I have to use an adapter to get two eight pins? I Google'd a bit around and one dude said he had the same graphics card, same wattage and he used one eight pin and one six pin and it worked fine, but I want to be certain before I try.

Sorry for wall of text.

 

[ruthless_villain]

you shouldnt really run it if the psu doesnt have the connectors, you know it doesnt have 8+8 pins for a reason but if its for a extremely short period of time i would go for it

 

[KapteinFruit]

you shouldnt really run it if the psu doesnt have the connectors, you know it doesnt have 8+8 pins for a reason but if its for a extremely short period of time i would go for it

It's for about 12 days. I read that the two extra ones are for grounding. I have no idea, tho. I really want to get my PC up and running. It's so boring without it.

 

[Ya93sin]

Might want to undervolt it to really minimise the risk of stressing your PSU, and if you have an OC on the CPU remove that, it might be OK.

 

[Grizzly]

Should be fine using adapters so long as you don't have much else plugged into your PSU.

 

[alicarve]

I had this problem with a gtx280 it wanted one 8 pin and one 6pin but my psu only had 2 6pin so i bought a 6 to 8 pin adapter and never had any problems with it and i ran f@h on it for a week straight without any problems just to test it

 

[S_I_N]

stop dont do it your psu is not enough to power it the req's for a 580 are 600watts and a min 42amps on the 12volt rail ur psu is only 550watts and 41 amps on the 12v rail. I doubt it'll even boot up as the card need 42 amps and that leaves nothing for the rest of ur system

if its just the fan on ur card replace it if possible should be plenty of after market options out there.

 

[Ya93sin]

Oh, why not just ask if you can borrow the 1250W at the same time?

 

[KapteinFruit]

Oh, why not just ask if you can borrow the 1250W at the same time?

It's my 1250W PSU, but he borrows it. And I read lots of people saying 550W is enough. And the PSU is all zipped down and shit, well the cables, and I couldn't bother undoing all that to get it back.

 

[yassarikhan786]

Power wise it might be enough but as S_I_N stated it won't have enough AMPS to run all of your components.

 

[S_I_N]

well bro its ur time and possibly components at risk here. If you feel it will work go for it but I strongly advise against it

Heres the scenario while other may have it work they may have a stronger 12v rail on their psu. And may have one thats under rated as well. In ur case the word OLD sticks out to me. I have looked at ur psu and frankly its not even bronze cert. Just 80+ cert which to means its a very budget psu ( I'm being nice and not saying cheap) . Now say ur psu can actually put out 50amps (which I doubt seriously) thats 42 for the gpu leaving only 8 for ur mobo cpu drives and fans. And btw if it booted at all I would wager the psu fan would be screaming at you worse than ur current faulty fan is.

By under rated what i refer to is some psu's can put out more than what is advertised. Remember Tom's review of the psu awhile back where they pushed it past its rating. Thats good for like silver and above rated ones. More along the gold lines.

 

[KapteinFruit]

well bro its ur time and possibly components at risk here. If you feel it will work go for it but I strongly advise against it

Heres the scenario while other may have it work they may have a stronger 12v rail on their psu. And may have one thats under rated as well. In ur case the word OLD sticks out to me. I have looked at ur psu and frankly its not even bronze cert. Just 80+ cert which to means its a very budget psu ( I'm being nice and not saying cheap) . Now say ur psu can actually put out 50amps (which I doubt seriously) thats 42 for the gpu leaving only 8 for ur mobo cpu drives and fans. And btw if it booted at all I would wager the psu fan would be screaming at you worse than ur current faulty fan is.

By under rated what i refer to is some psu's can put out more than what is advertised. Remember Tom's review of the psu awhile back where they pushed it past its rating. Thats good for like silver and above rated ones. More along the gold lines.

Of course I won't do it when all of you are telling me not to. I'm just saying what I've read so that it will be looked at from other perspectives as well. Not trying to argue with the OC3D hardcore people, just trying to get info from both sides. I haven't tried turning it on or anything, haven't even plugged in both PCI-E power connectors, just the 8 pin. Haven't plugged in the main power cord either so don't worry.

I'll just have to be without a gaming PC for about 2 weeks if not longer and that will suck so hard... I'll have to be social...

 

[S_I_N]

heres a though why not just use his rig????

and no sweat matey I didnt hink ya was arguing lol I just wanted to make sure you had all the facts i could give ya

 

[Scoob]

heres a though why not just use his rig????

I'd go with this suggestion if it's possible. In the meantime you can spec up a good 750w+ PSU for your Bro to buy (taking your 1250w back) and also decide which GPU you'd like to replace yours.

As stated earlier, it's very important you don't just take a PSU at its headline figure, you need to check the individual rails and ensure they are up to the job.

Also, from what I recall, isn't a 6-pin PCI-E power 75w whereas an 8-pin is 150w, the slot will provide 75w - according to the PCI-E specs. To me a 6 to 8-pin adaptor, while it will work fine on many quality PSU's, isn't a good fit purely from the numbers - i.e. you're potentially asking DOUBLE the PCI-E power spec if running a 6 to 8-pin adaptor.

A good PSU is as much the core of a good system as the CPU, GPU and motherboard in my view. Best to get things done right first time, rather than try and fail then spend more.

Good luck,

Scoob.