I plan to upgrade my old GeForce 9600 GT 1GB 256-bit to a not so new card that uses 2x6-pin PCI-E like GTX 460 or Radeon similar video card. I currently use (1) 2x4-pin molex to 6-pin from two different 12v rail to power my GPU and it works with no problems.
Now, i wonder if can power up the other GPU the requires 2x6-pin... I still have unused 2x4-pin molex from 2 different 12v rail that was hooked up on my current GPU and planning to add another 2x6 molex to 6-pin, so that makes (2) 6-pin PCI-E's.
I have limited funds so i'm not open to buy a new PSU or other newer video card. The card i'm getting is just a spare from my friend.
I just wanted to know if this is possible or if someone had tried it before? I've already looked in google but they always suggest to buy a new PSU but that is not the plan.
Some suggest to use this StarTech Model PCIEXSPLIT6 6" 6 Pin PCI Express splitter:
If the 2xmolex connections are actually on different rails you will probably be fine using molex-> 6pin adapters. If all the molex happen to be on one rail you might have issues. Generally the adapters work fine if there is enough power there.
I'm not sure what you hope to gain from posting this. You already said buying a PSU isn't an option, nor is buying a better card because you are getting this from a friend. And judging from what you've wrote I'm not sure you have a real idea as to how PSUs work, etc.
My general advice is to never use adapters. Ever. If the people who made the psu wanted you to have PCIe plugs on there they would have done that. There are a few exceptions to this such as high powered units that existed before PCIe came about. The problem is that was so long ago those units should be retired by now. But of course you don't want to/can't buy one so telling you need need to upgrade if you want to use TWO adapters is a bad idea on my part. If this is really a friend then see if you can test it first. Wire it up, try to play a game. But in my mind you will really be pushing that old PSU. My advice is to keep saving and get a better PSU.
Seems like one rail is for the cpu and mobo and one for peripherals. I would chance it.
Seems like and is are 2 different things
It's a rare occurrence but it does happen, the OCZ MSXP is an example, really don't know about OP's, why I said "typically"
Usually the seperate "rails" will be signified by stripe on the insulation, easy way to find out what's what
Right. (and even then not always.) But judging buy the OPs writing I'm assuming when he tried a "single rail" it was just that he tried two "molex plugs" on the same bit of wire. I mean to disrespect to the OP, but he really needs to upgrade the PSU before worrying about putting a 150W+ GPU in there.
You should upgrade the PSU when you can, regardless of whether you get a new GPU that doesn't need 2x6pin, the connectors aren't really the problem it's the PSU itself that is suspect. A cheap PSU like that can cause damage to your computer if you are unlucky by operating out of voltage requirements while 'working' normally, or surging power to components when it fails.
This is a helpful (not definitive) list for shopping around: http://www.eggxpert.com/forums/thread/323050.aspx , search for reviews from whatever you choose to buy on Jonnyguru/hardware secrets etc (don't go by newegg reviews, because no end user really has any idea how good their PSU is unless they have an electronics testing lab at home).
If you get a quality 600w psu, it should be powerful enough to run any single GPU for the forseeable future.
Thanks Maziar! I just need to update this thread as promised.
I got it working on my current PSU. I ran it with FurMark and MSI Kombustor burn in test with no errors or problems. Also, i've noticed on the label on my PSU, it stated that the combined 12v1 and 12v2 = 38A. So, i think my PSU can really handle it! Been using it for almost a week now and my only problem is the heat that the new card is producing