Is there a 6 pin Pci-Express adapter to 4 pin molex?

[peter7921]

Is there such a thing as a 6 pin PCI express connector to 4 pin molex.

Hi, I have a P4 3.0 oc 3.4 northwood and a 6800 ultra AGP, 5 hard drives and other accesories. Recently i bought a new Power supply, Antec 550W TP2. Problem is they only give you four molex connecters, i had to use two molex's same chain for my Graphics card, and used a "Y" adapter to connect a couple of fans. On the othe chain i used 2 y adapters to connect 3 hard drives and 2 dvd/cd drives. I am using the serial connectors fo my other two hard drives.

Problem is i have two pci-express connecters id like to use for my Graphics card. I know theres two 12V rails but im not sure if one is for the pci express connectors and the other for the rest of the connectors. If it is then im only using one rail.

Any ideas?

Thx

 

[Wentelteefje]

About your rails, 12V1 is for al the peripherals (mainboard, graphics card), while 12V2 is for your processor normally, but I don't see why you shouldn't be using the two of them... They are meant to be powering your graphics card, so they will have power enough for any other task you'd want to use them for...

The PSU you have is modular... Isn't there any way on connecting another "string" with more molexes, instead of one with PCI-Express connectors you're not going to use anyway... You should have received 6 cables, of which maximum 4 can be connected... Check it out...

EDIT: Newegg doesn't seem to offer such cables... On the other hand, Phoronix talks about two standard molex cables (3 connectors each), so maybe look a bit around... Six would already be better than four...

 

[peter7921]

Originally posted by: Wentelteefje
About your rails, 12V1 is for al the peripherals (mainboard, graphics card), while 12V2 is for your processor normally, but I don't see why you shouldn't be using the two of them... They are meant to be powering your graphics card, so they will have power enough for any other task you'd want to use them for...

The PSU you have is modular... Isn't there any way on connecting another "string" with more molexes, instead of one with PCI-Express connectors you're not going to use anyway... You should have received 6 cables, of which maximum 4 can be connected... Check it out...

Thx for your reply Wentelteerfje. The power supply i have isn't modular heres a link to it. http://www.antec.com/us/productDetails.php?ProdID=22550

I kind of wished i had bought the modular one in retrospect, it gives me more options, but my local store only had the neo 480 modular. I needed a power supply in a hurry was having problems with the current one not powering my system properly, it was an Antec truepower 430, i was getting the message from the nividia drivers saying your video card is not being powered properly.

 

[JackMDS]

http://www.microcenter.com/single_product_results.phtml?product_id=0221308

:sun:

 

[Wentelteefje]

You're completely right, you mentioned TP2... My mistake, I'm sorry... Hmm that's a bit of a pity then... Using too much of these splitters isn't really an option too, as that will be too stressing for your PSU... I'll search around for that cable...

 

[peter7921]

Originally posted by: JackMDS
http://www.microcenter.com/single_product_results.phtml?product_id=0221308

:sun:

Thx for the reply JackMDS
I wish thats what i needed have found lots of those in searching google, what i need is the opposite. A cable that will take my 6 pin pci-express connector and give me a 4 pin molex.

 

[Wentelteefje]

Hmm, they're indeed unfindable (if that exists in English...), but you could start with powering your graphics card with such a splitter... That way you already save one... Don't worry, your power supply will handle that load just fine...

I'll keep looking for it...

EDIT: Guess what? The NeoPower 480W has 9 Molexes... :Q

 

[peter7921]

Originally posted by: Wentelteefje
Hmm, they're indeed unfindable (if that exists in English...), but you could start with powering your graphics card with such a splitter... That way you already save one... Don't worry, your power supply will handle that load just fine...

I'll keep looking for it...

EDIT: Guess what? The NeoPower 480W has 9 Molexes... :Q

lol, maybe i should take back the one i bought and get a modular one

 

[peter7921]

quick bump just in case

 

[Ike0069]

Don't think they exist.
Your best bet is probably to try and exchange it for a PSU with more 4-pin molex's.

 

[arcas]

You can make your own assuming your video card has no need for the 5V line on the 4-pin molex.

For the 6-pin side, it looks like you'll need Molex part #39-01-2061 (DigiKey #WM3602-ND) and corresponding male crimp connectors (DigiKey #WM1911-ND). I didn't bother looking up the part numbers for the 4-pin side but at worst you can get them at Radio Shack. Note that these connectors are only rated for 5A. If your video card needs less than 5A on the 12V line, all you'll need to do is run two 16ga wires (one connecting the 12V pin on the 4-pin Molex to one of the 12V pins on the 6-pin and one connecting one of the grounds). If your card needs more than 5A, you'll need to run multiple wires (ie connect all three 12V pins of the 6-pin Molex with the single 12V pin of the 4-pin Molex. similar for the grounds).

 

[dman918]

How do you know which rail is which? I want to make sure I have the cabling done correctly.

 

[arcas]

According to the ATX v2.2 specification, the only connector that's powered from the 12V2DC rail is the little square 4-pin connector. All other connectors (the 24-pin main ATX connector, the 4-pin peripheral connectors, the SATA connectors) are connected to the 12V1DC rail. Now, the 6-pin PCI-e connector isn't mentioned in this specification so I'm guessing here but I would presume that this pattern would continue: the 12V2DC rail is reserved for the CPU, the 12V1DC rail supplies everything else.

I'll add the standard disclaimer about damage incurred if you make your own adapter cable and wind up messing up your hardware. You do this at your own risk.