GTX 780 has 6 pin and 8 pin psu only has 6 pin

[Randomizer23]

So my title says it all. My gpu needs another 8 pin but my psu only has a 6 pin what could i do thats cheap that will fix this?

[Firewrath9]

New PSU.

[Spotty]

1 minute ago, Randomizer23 said:

my psu only has a 6 pin

Your PSU only has one 6pin PCIe connector? Time to get a new PSU.

[ChairSpelledWrong]

It's not too expensive to get a new psu, also seeing how you won 't be able to run your gpu with your older one.

[LienusLateTips]

6 pin only? New PSU.

[Randomizer23]

1 hour ago, LienusLateTips said:

6 pin only? New PSU.

 

1 hour ago, TheChairSalesman said:

It's not too expensive to get a new psu, also seeing how you won 't be able to run your gpu with your older one.

 

1 hour ago, Spotty said:

Your PSU only has one 6pin PCIe connector? Time to get a new PSU.

 

1 hour ago, Firewrath9 said:

New PSU.

Lol so many replies of the same. Its a 700w psu shouldn't that be enough?

[ChairSpelledWrong]

4 minutes ago, Randomizer23 said:

 

 

 

Lol so many replies of the same. Its a 700w psu shouldn't that be enough?

It only depends if you have the right connections you need, unless its a modular psu. If you really want to risk a lot, i'm sure you can find an adapter from 6 pin to 8 pin to use on your gpu, it would probably be a better idea to get a new psu, although the psu you have at the moment is not useless.

[mariushm]

Your power supply is NOT a 700w power supply if it has only one 6 pin pci-e connector.

 

6 pin connectors are supposed to transfer up to 75 watts into a video card. 8pin pci-e connectors are designed to transfer double that, up to 150 watts.

 

The GTX 780 is a video card that consumes up to 200-220 watts ... it takes around 60 watts through the pci-e slot, around 120-150 watts through the pci-e 8 pin connector,, and whatever's left through the extra 6 pin connector.  

 

If your power supply has only one pci-e 6 pin connector, it means it's lying about its maximum power - manufacturers can put anything on the label if they don't care about their reputation, or if they don't give you the connectors to actually use the advertised value..

Your power supply is probably a 420-500w maximum psu, if it has only one pci-e 6 pin connector.

 

There are adapters which convert two molex (old hdd connectors) or two sata connectors into a pci-e 6 pin or a pci-e 8 pin connector, but those adapters are meant to be used with video cards that use less power, let's say cards that in total don't need more than around 100 watts (so they take around 50w from slot and around 50w from a pci-e 6pin connector)

With a video card like GTX 780 using such adapters is NOT recommended - you can burn those adapters and you could even damage your video card with such adapters.

[Randomizer23]

59 minutes ago, TheChairSalesman said:

It only depends if you have the right connections you need, unless its a modular psu. If you really want to risk a lot, i'm sure you can find an adapter from 6 pin to 8 pin to use on your gpu, it would probably be a better idea to get a new psu, although the psu you have at the moment is not useless.

I currently have a rocketfish 700w psu its 80 white rated. Can I get a molex to 8 pin?

[aisle9]

7 minutes ago, Randomizer23 said:

Lol so many replies of the same. Its a 700w psu shouldn't that be enough?

If you have a 700W PSU that only has a single six-pin, you don't have a 700W PSU.

[ChairSpelledWrong]

3 minutes ago, Randomizer23 said:

I currently have a rocketfish 700w psu its 80 white rated. Can I get a molex to 8 pin?

https://www.amazon.com/4-Pin-Molex-EPS-12V-Converter-Adapter/dp/B00OSR3V84

This is a converter, but doesn't work for a gpu, only motherboard. I also couldn't find a rocket fish 700watt psu. I would upgrade to a more notable and maybe a modular psu.

[aisle9]

6 minutes ago, Randomizer23 said:

I currently have a rocketfish 700w psu its 80 white rated. Can I get a molex to 8 pin?

No. Molex-to-anything other than Molex is asking for trouble down the road. Get a new PSU that doesn't suck.

[dDave64]

7 minutes ago, mariushm said:

Your power supply is NOT a 700w power supply if it has only one 6 pin pci-e connector.

 

6 pin connectors are supposed to transfer up to 75 watts into a video card. 8pin pci-e connectors are designed to transfer double that, up to 150 watts.

 

The GTX 780 is a video card that consumes up to 200-220 watts ... it takes around 60 watts through the pci-e slot, around 120-150 watts through the pci-e 8 pin connector,, and whatever's left through the extra 6 pin connector.  

 

If your power supply has only one pci-e 6 pin connector, it means it's lying about its maximum power - manufacturers can put anything on the label if they don't care about their reputation, or if they don't give you the connectors to actually use the advertised value..

Your power supply is probably a 420-500w maximum psu, if it has only one pci-e 6 pin connector.

 

There are adapters which convert two molex (old hdd connectors) or two sata connectors into a pci-e 6 pin or a pci-e 8 pin connector, but those adapters are meant to be used with video cards that use less power, let's say cards that in total don't need more than around 100 watts (so they take around 50w from slot and around 50w from a pci-e 6pin connector)

With a video card like GTX 780 using such adapters is NOT recommended - you can burn those adapters and you could even damage your video card with such adapters.

 

Definitely agree. There's basically nothing else that would be taking that kind of wattage so it wouldn't make sense to only have the one connector if the wattage advertised was accurate. Seems suspicious to me, I'd guess their marketing lied. My only other guess is that it could be REALLY old (as in before the 8 pin connector came out) but I'd recommend a PSU replacement anyway in that case.

 

You can get a really good 80+ certified 550w-750w (and fully modular) power supply that will last for years for $120 or under. I know EVGA makes some really good ones.

 

 

[aisle9]

2 minutes ago, dDave64 said:

You can get a really good 80+ certified 550w-750w (and fully modular) power supply that will last for years for $120 or under. I know EVGA makes some really good ones.

You can get a CX550M that's perfectly adequate for a GTX 780 for $50-60 most of the time, as low as $30 if you catch the right sale.

[Fasauceome]

A good PSU is a good investment, never use an inadequately cheap power supply in a system that you want to keep using. Spending on a better PSU is a kind of insurance, and you can stay sub $60 and get something reasonable.

[Curious Pineapple]

I have an 850w 80+ PSU without an 8-pin PCIe connector which will have no problem using a 6 to 8 pin adaptor, some how I doubt the OP will have the same sucess though.

[dDave64]

4 minutes ago, aisle9 said:

You can get a CX550M that's perfectly adequate for a GTX 780 for $50-60 most of the time, as low as $30 if you catch the right sale.

That is a great deal as well.

 

I prefer fully modular but that's not bad at all to have the 24 PIN permanently fixed as that connector is always needed. The EVGA definitely has the capability to run more connectors but if you don't need them  and don't care about fully modular then that's very adequate.

[aisle9]

1 minute ago, Curious Pineapple said:

I have an 850w 80+ PSU without an 8-pin PCIe connector which will have no problem using a 6 to 8 pin adaptor, some how I doubt the OP will have the same sucess though.

Here's what 80+ means with garbage PSUs like that: the manufacturer made a small number of that model with good parts, sent them off to get the 80+ rating, then mass-produced cheap Chinese firecrackers.

You have a 400W PSU. At best.

[Curious Pineapple]

Just now, aisle9 said:

Here's what 80+ means with garbage PSUs like that: the manufacturer made a small number of that model with good parts, sent them off to get the 80+ rating, then mass-produced cheap Chinese firecrackers.

You have a 400W PSU. At best.

I have a HP Z800

[aisle9]

1 minute ago, dDave64 said:

That is a great deal as well.

 

I prefer fully modular but that's not bad at all to have the 24 PIN permanently fixed as that connector is always needed. The EVGA definitely has the capability to run more connectors but if you don't need them  and don't care about fully modular then that's very adequate.

The only real plus of full modular over semi for me is a flat 24-pin. Unless I really want a flat 24-pin for a build, I'll go semi-modular or non-modular to save a few bucks.

[aisle9]

1 minute ago, Curious Pineapple said:

I have a HP Z800

Ok, so you have a proprietary PSU built to manufacturer specifications based upon the usage they expect to see. That's different.

 

Also, unless it's Lite-On or Delta, it's not really 800W.

[Spotty]

29 minutes ago, Randomizer23 said:

I currently have a rocketfish 700w psu its 80 white rated. Can I get a molex to 8 pin?

Is this your PSU? https://www.hardwaresecrets.com/rocketfish-700-w-power-supply-review/

[Curious Pineapple]

2 minutes ago, aisle9 said:

Ok, so you have a proprietary PSU built to manufacturer specifications based upon the usage they expect to see. That's different.

 

Also, unless it's Lite-On or Delta, it's not really 800W.

It's a Delta, and with a top price of nearly 10 grand when released, you'd expect it to have a top quality supply!

[aisle9]

6 minutes ago, Spotty said:

Is this your PSU? https://www.hardwaresecrets.com/rocketfish-700-w-power-supply-review/

See, I knew Rocketfish made a ton of phone cases and Bluetooth shit for Best Buy back in the day, but I thought surely this was a different Rocketfish. Dynex and Insignia PSUs were always junk, so it's nice to see that the best they can say about the Rocketfish is that it didn't explode.

 

5 minutes ago, Curious Pineapple said:

It's a Delta, and with a top price of nearly 10 grand when released, you'd expect it to have a top quality supply!

Delta is the best of the best prebuilt OEMs. If they say 800W, you could probably milk 880W out of it for a short time.

[Mick Naughty]

Doesn’t matter how many watts it is, if it can’t support the amperage. 

 

I had a “700” that had enough connections for 2 cards. 

 

A 3770k at 780 would have to be at stock settings to make it through a valley benchmark. Crap psu’s won’t last with a card like that.