(this is the highest I've seen this PSU, bad price.)Ĭorsair CX430. I have a better pc with a decent psu that it has a pci express connector, so it's my first time running with this pci express adapter I wasn't sure how to connect it.Why would you need two? The 7850 only takes one 6pin plug? Here are the PSUs I've already mentioned twice.Īntec 380W green. It's just an old graphics card which I replaced with a newer one and I found this pc so I thought I might utilize this graphics card. Maybe keep a fire extinguisher on hand, and be sure anybody using it has the good sense to be able to unplug it if something gets out of hand. If the power supply fails, adding to the low cost nature of it, it likely doesn't include all manners of electrical isolation and protection, so you should anticipate it can damage other components in the process.īeing an old machine, it's probably not the biggest deal if it self-destructs. If you exceed the limits of your power supply, you can expect the system to spontaneously reboot, power off, have random BSOD errors, TDR errors with the graphics card, and the possible spontaneous self-destruction of the power supply. Only thing I can see preventing that would be an exceptionally weak CPU. If you never run the GTS 450 at full capacity, you might be okay, but it's not a high end card so it should be fairly easy to push the card toward it's maximum with any current gaming title. Just off the top of my head, 18 A is actually the proposed standard (which a lot of supplies don't follow) for 12 V rails that are compliant, so it's entirely possible there could be safety cutoffs that are rated at 18 A but don't actually function until 20 A, hence the rating.Ī GTS 450 graphics card can draw 10+ amps on the 12 V rail, depending on the loading, which along with your CPU (assuming a 65 W CPU ) and motherboard, hard drive(s), and any other peripherals drawing from the 12 V rail, may actually put you over the limit on the 12 V portion of the power supply. It has a single 12 V rail rated at 20 A, which in a great deal of cases is being generous by the manufacturer. You're very close to the limits of that power supply. Being a low end graphics card, it's probably okay to use a single lead, but your power supply isn't a good match whether you use one lead from the adapter or both. Each wire is only rated to carry so much current, so the load is spread to two sets of wires. You are supposed to use both Molex connectors on a PCI-e power adapter. I connected my graphics card to the 6 pin connector and on the other end I connected one molex connector and there is another one that is free, I don't know if I should connect it too. It's just an old pc that I found and it's not for gaming and it's meant for testing. The recommended route is to replace the power supply with a better quality unit that provides the necessary power connectors. You can, if you are certain the power supply should be up to the task, adapt spare Molex or other power connections from the power supply to provide you with a PCI-e power connection from which you can power your graphics card. If your graphics card requires a PCI-e power connection, but your power supply does not provide one, it is usually a sign that your power supply is of very old design, or the manufacturer doesn't feel that power supply is suitable to power a graphics card with. If your motherboard does not provide a PCI-e x16 slot to plug a graphics card into, there is no practical way to change that, other than to upgrade the motherboard, which may be as drastic as purchasing most of the parts for a completely new computer, depending on the age of your equipment. For graphics cards requiring more power, there will be one or more PCI-e power connector located on the graphics card, usually toward the end furthest from the display output connectors. The graphics card will be powered by the slot it plugs into, but the slot is only able to provide a certain amount of power. Graphics cards for the last 10+ years have plugged into the motherboard via a PCI-e x16 slot. I can make a few general assumptions / recommendations, based on what I think you're asking. Can you list the make and model of your motherboard, power supply, and graphics card? It would be helpful if you could be more specific about the hardware you are working with.
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