Is there a good website that explains all the power supply connectors that a modern ATX system uses/needs?
I am in the process of looking for a PS. I want to build an i7 system here in the next 3-4 months. I have an old Antec full tower ATX case I can use from a build I did about 8yrs ago and the power supply position is up top if that matters. I'm thinking I should probably go with about a 700w PS from what I'm reading, but not totally sure yet. My build will be an un-OC'd dependable workstation for Rhino, AutoCAD, and CS4 Suite. Two monitors for starters.
Ok that explains some things. But when I look at specs listed at Newegg or such I see some have 24pin mains or other have 20-4 mains. So it looks like I should probably not buy one until I have the Motherboard. I'm not able right now to buy everything and I was thinking if a good deal came up, to snatch it. But maybe not...
The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the 12 volt rail(s) can easily power a system with any single video card made. A high quality 700 to 750 watt power supply with sufficient current (amps) on the 12 volt rail(s) can power a system with two video cards operating in dual mode. There are a few exceptions like the new ATI Radeon HD 5XXX series cards which use less power due to their energy efficiency.
A high quality 500 to 550 watt psu will have a +12 volt rail rated at 40 amps. A high quality 700 to 750 watt psu will have a +12 volt rail rated at 60 amps.
Before purchasing a new psu you will need to decide whether you will eventually have a pc with one or two video cards.
Modern power supplies come with a 20+4 pin motherboard power connector which can be used as either a 20 pin connection or a 24 pin connection. The manufacturers have it covered both ways.
Corsair, PC Power & Cooling, and Seasonic are some of the brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty. Lately we've been seeing a few other brands offering some high quality units. An example would be the Antec Earthwatts series which is an improvement over Antec’s older series psu’s.
So I need to decide if I will need two video cards. I am building a PC that I will use at home for AutoCAD and 3D modeling and the CS4 Suite. I want to have two monitors. I've not researched yet how I will setup those two monitors. At work we only have one monitor for these programs.
But If I just get a good 750w unit to start with I'd be covered it sounds like.
You do not need two video cards for AutoCAD, 3D modeling, or the CS4 Suite. We've had posts in the past about pc requirements for the software programs you use.
Connecting two monitors to a single video card is not a problem. Modern video cards come with the necessary connections. Some cards like the new ATI Radeon HD 5000 series have the necessary connections for three monitors.
Yes, a high quality 700 to 750 watt power supply could be considered as future proofing but it is not necessary for what you will be doing. The software you will be using is cpu intensive rather than video card intensive.
NO! Must be a misunderstanding. The Antec Earthwatts EA650 is an excellent power supply. Like other modern power supplies it has a 20+4 pin motherboard power cable that can be used as either a 20 pin or 24 pin connection. The manufacturers gave users a convenient option. Older motherboards required a 20 pin connection. Modern motherboards require a 24 pin connection. The manufacturers make modern power supplies that can be connected either way. It is a matter of convenience.