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Message 1335456 - Posted: 7 Feb 2013, 15:13:27 UTC

Im installing my EVGA 550 Ti GPU. It has a 6pin PCI Express power connector that is slpit off to two Molex power connectors.
Do I connect both molex power connectors or just One?

Ive tried searching for a video on installing a 550 Ti but no luck.

I know this is most likely a stupid question. But I dont know.
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Message 1335461 - Posted: 7 Feb 2013, 15:33:26 UTC

Thanks Mark. I wasnt sure what to do.
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Message 1335467 - Posted: 7 Feb 2013, 15:47:49 UTC - in response to Message 1335461.
Last modified: 7 Feb 2013, 15:48:50 UTC

read your install infor from the GPU manufacturer. Some send the molex adapter but insist in their literature to only use the 6 pin plug. Your best bet is to upgrade your PSU to one that has at least 1 6 pin gpu plug

/edit after rereading the original post it sounds like the 6 pin you have should work
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Message 1335468 - Posted: 7 Feb 2013, 15:49:01 UTC - in response to Message 1335461.

If you can, try to put the Molex connectors on different 12 volt outputs - see the side of your power supply to see if it has > 1 (12V1, 12V2, etc.) - so as to distribute the power drain more evenly. Your PSU may have > 1 but (even if you have the manual) may not tell you which outputs go with which string of connectors. So don't sweat it if you can't find the answer...
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Message 1335469 - Posted: 7 Feb 2013, 15:51:36 UTC - in response to Message 1335456.

Im installing my EVGA 550 Ti GPU. It has a 6pin PCI Express power connector that is slpit off to two Molex power connectors.
Do I connect both molex power connectors or just One?

I would also plug both in, and I would try to make sure that you are using the same power cord from the power supply. I have seen funny things happen if you have both 12v rails joined externally with an adapter like this. Best if you have an unused power cord from the power supply and use that.
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Message 1335471 - Posted: 7 Feb 2013, 15:58:02 UTC - in response to Message 1335468.
Last modified: 7 Feb 2013, 16:05:03 UTC

If you can, try to put the Molex connectors on different 12 volt outputs - see the side of your power supply to see if it has > 1 (12V1, 12V2, etc.) - so as to distribute the power drain more evenly. Your PSU may have > 1 but (even if you have the manual) may not tell you which outputs go with which string of connectors. So don't sweat it if you can't find the answer...

To add to above. One recommendation I found is to use two separate power cables for the adapter. Some power cables have two 4 pin molex connectors, you could connect your adapter to this one cable. I found that to be not recommended.

Use two separate power cables, attach one 4 pin molex from the adapater to each power cable.

To OP. (Also. 550ti has hefty power requirements. Nvidia specification says to use 550 watt power supply. That might be a little overblown, but still, do you have a power supply that is even close to 550 watt?)

Edit. NVidia website says that system would need 400 Watt power supply. Bottom, Thermal and Power Specs:
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-550ti/specifications
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Message 1335472 - Posted: 7 Feb 2013, 16:04:08 UTC - in response to Message 1335471.

If you can, try to put the Molex connectors on different 12 volt outputs - see the side of your power supply to see if it has > 1 (12V1, 12V2, etc.) - so as to distribute the power drain more evenly. Your PSU may have > 1 but (even if you have the manual) may not tell you which outputs go with which string of connectors. So don't sweat it if you can't find the answer...

To add to above. One recommendation I found is to use two separate power cables for the adapter. Some power cables have two 4 pin molex connectors, you could connect your adapter to this one cable. I found that to be not recommended.

Use two separate power cables, attach one 4 pin molex from the adapater to each power cable.

To OP. Also. 550ti has hefty power requirements. Nvidia specification says to use 550 watt power supply. That might be a little overblown, but still, do you have a power supply that is even close to 550 watt?


I have a Corsair TX650 ATX12V v2.31 I think its enough.
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Message 1335473 - Posted: 7 Feb 2013, 16:09:03 UTC - in response to Message 1335472.

If you can, try to put the Molex connectors on different 12 volt outputs - see the side of your power supply to see if it has > 1 (12V1, 12V2, etc.) - so as to distribute the power drain more evenly. Your PSU may have > 1 but (even if you have the manual) may not tell you which outputs go with which string of connectors. So don't sweat it if you can't find the answer...

To add to above. One recommendation I found is to use two separate power cables for the adapter. Some power cables have two 4 pin molex connectors, you could connect your adapter to this one cable. I found that to be not recommended.

Use two separate power cables, attach one 4 pin molex from the adapater to each power cable.

To OP. Also. 550ti has hefty power requirements. Nvidia specification says to use 550 watt power supply. That might be a little overblown, but still, do you have a power supply that is even close to 550 watt?


I have a Corsair TX650 ATX12V v2.31 I think its enough.

Yes, it is more than enough. I am surprised you got 550ti. With such nice power supply you could have run two GTX 460. Also, you should have two 6 pin connectors for the graphics cards, so you should not need an adapter at all.

I edited my earlier post. Nvidia says the whole system with 550ti should need 400 Watt power supply, so you are ready to roll.

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Message 1335476 - Posted: 7 Feb 2013, 16:14:12 UTC - in response to Message 1335473.

If you can, try to put the Molex connectors on different 12 volt outputs - see the side of your power supply to see if it has > 1 (12V1, 12V2, etc.) - so as to distribute the power drain more evenly. Your PSU may have > 1 but (even if you have the manual) may not tell you which outputs go with which string of connectors. So don't sweat it if you can't find the answer...

To add to above. One recommendation I found is to use two separate power cables for the adapter. Some power cables have two 4 pin molex connectors, you could connect your adapter to this one cable. I found that to be not recommended.

Use two separate power cables, attach one 4 pin molex from the adapater to each power cable.

To OP. Also. 550ti has hefty power requirements. Nvidia specification says to use 550 watt power supply. That might be a little overblown, but still, do you have a power supply that is even close to 550 watt?


I have a Corsair TX650 ATX12V v2.31 I think its enough.

Yes, it is more than enough. I am surprised you got 550ti. With such nice power supply you could have run two GTX 460. Also, you should have two 6 pin connectors for the graphics cards, so you should not need an adapter at all.

I edited my earlier post. Nvidia says the whole system with 550ti should need 400 Watt power supply, so you are ready to roll.

My 550 Ti just has one 6 pin connector on the card. But the power cors they sent with the card is a 6 pin slit into two molex connectors.
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Message 1335477 - Posted: 7 Feb 2013, 16:15:19 UTC - in response to Message 1335476.

true but your PSU should have a 6 pin connector already to go. No need for the adaptor
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Message 1335482 - Posted: 7 Feb 2013, 16:21:45 UTC - in response to Message 1335476.
Last modified: 7 Feb 2013, 16:23:03 UTC

If you can, try to put the Molex connectors on different 12 volt outputs - see the side of your power supply to see if it has > 1 (12V1, 12V2, etc.) - so as to distribute the power drain more evenly. Your PSU may have > 1 but (even if you have the manual) may not tell you which outputs go with which string of connectors. So don't sweat it if you can't find the answer...

To add to above. One recommendation I found is to use two separate power cables for the adapter. Some power cables have two 4 pin molex connectors, you could connect your adapter to this one cable. I found that to be not recommended.

Use two separate power cables, attach one 4 pin molex from the adapater to each power cable.

To OP. Also. 550ti has hefty power requirements. Nvidia specification says to use 550 watt power supply. That might be a little overblown, but still, do you have a power supply that is even close to 550 watt?


I have a Corsair TX650 ATX12V v2.31 I think its enough.

Yes, it is more than enough. I am surprised you got 550ti. With such nice power supply you could have run two GTX 460. Also, you should have two 6 pin connectors for the graphics cards, so you should not need an adapter at all.

I edited my earlier post. Nvidia says the whole system with 550ti should need 400 Watt power supply, so you are ready to roll.

My 550 Ti just has one 6 pin connector on the card. But the power cors they sent with the card is a 6 pin slit into two molex connectors.

They included an adapter with your card, you don't need it. The adapter is for people like me who have older power supplies. My power supply does not have any PCI-e power cables, not the 6 pin, not the 8 pin. All I have are the 4 pin molex and SATA power connectors. So people like me need the adapter.

You have a modern power supply. I checked the newegg page for it, it has two 6 pin PCI-e power connectors, they are there specifically to power video cards. Just hook one of them to the video card, that is all you need, ignore the adapter.
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Message 1335484 - Posted: 7 Feb 2013, 16:37:35 UTC
Last modified: 7 Feb 2013, 16:55:38 UTC

I have powered it up and When i got to the password part my mouse didnt work. I went to Bios and my mouse works. At least the card is working.


I must have a bum USB connection om my motherboard, I moved the mouse usb to another one and its works. Drivers for the 550Ti are uploaoding.
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Message 1335524 - Posted: 7 Feb 2013, 18:19:13 UTC

Update. The card is in and running Milkyway. I havent been able to connect to Seti since yesterday. Just get the normal cant connect blurb. So I know the card is working. Now I hope it dosent start throwing errors at milkyway. I know I need to update the drivers (260.something) But Im to tired to do that now.
thanks to all who answered my questions.

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Message 1335529 - Posted: 7 Feb 2013, 18:34:41 UTC

it looks like you have a few validation inconclusives at MW
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Message 1335823 - Posted: 8 Feb 2013, 15:07:49 UTC - in response to Message 1335529.

it looks like you have a few validation inconclusives at MW


I noticed that. The good thing is that the others errored out. I also have two that errored out.

I did update the drivers this morning to 310.## the temps are right around 63 C. But I realize Seti is not running on that card either. I will run milkyway out then see if I can connect to get Seti work in the morning.
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Message boards : Number crunching : Another quick question

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