Will a DVD drive SATA power cable supply 12V, 5V, or 3.3V?
I am going to buy a USB 3.0 PCI-e card for my PC, but it requires a molex pin for more power. I found a SATA to molex adapter, and I plan to just use the SATA cable for my DVD drive that I never use. The USB card says it need a 4-pin 5V peripheral power cable. Will the DVD drive cable work on this?
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yes, the red wire is the 5v line in the 4 pin molex connector. Yellow is 12v and the other two are grounds. The sata power cable also include 3.3v but thats not carried over to the molex.
You know I was just looking at those PCI USB3 cards. You might not get full USB3 speeds if you connect more than 1 device since PCIe x1 is only 500MB/s anyways (assuming your board meets spec 2.0)