DIY Make 2 SMPS(PSU) Work Together in a Single Pc...

Run your high end graphics card with a low end PSU costing as low as Rs 300 to 400...Cant believe??...Check this out guys....

Step 1: Tight on the Budget???....read This....

This is my second instructable i am posting.All u gamers out there,this is a good hack that u can use.Graphics cards are the most power hungry component of a PC.Most graphics card nowadays comes with one or two 6 pin PCI-Express connectors to supply them power.This requires a powerful high end PSU.After investing Rs 10000 (convert to your respective currency if u are from outside India) on a good graphics card,it becomes a strain on the pocket to invest another Rs 5000 on a high end PSU that have the 6 pin PCI express connector.Well,If u have the affordability or u are worried about the impacts of a cheap PSU in the long run,u may ignore this thread.But i assure u,its more important to use a good UPS(which has a built in stabilizer) and have your house properly earthed.Without proper earthing, a high end PSU may fail within 6 months.

Step 2: What May Be the Solution???.... :-/

Actually i am in a bit of a situation here which u also may face someday....i am explaining it step by step..

1. I have a NVIDIA GTS 250 1GB DDR3 graphics card...but its only DirectX 10 enabled.

2.I bought it for Rs 10,500 along with a COOLER MASTER EXTREME POWER 600W PSU which costs Rs 4000.

3.Now, i need to sale my GTS 250 but i want to keep my PSU cuz its working fine and buying a new one will also cost money.

4.But the person buying it is buying an used card because he it tight on budget.

5.So the buyer wont be able to afford Rs 5000 on a new PSU who is buying an old card for Rs 3000.

6.So,the net result is...I will never be able to sell my Graphics Card....:-(

Then,an idea came to my mind....

Step 3: The Hack Begins....

The concept used here is to use two isolated power sources and to integrate them into one computer so that they will be switched on and off simultaneously,but will not share their power.It means the second psu is only meant to drive ta graphics card,but will start and stop with the primary PSU.

For doing this,I took 2 FRONTECH 400 Watt cheap power supplies each costing Rs 300.Take the two power supplies and carefully notice the 24 pin ATX power connector.

There is a GREEN coloured cable in the above pic and just adjacent to it is a black coloured cable.In normal situation,when the PSU is open(not connected to the motherboard or anything), it doesn't start just by hooking it up with the AC mains.U need to short circuit the green and the black cable with a pin or some small wire. So basically when u start a PC by switching on the Power button on the cabinet,u are just shorting these two wires.

Step 4: Do It Carefully....

Cut away the GREEN and the adjacent black wire from the secondary PSU keeping a little wire from the base of the connector as shown in the above picture.(If u want to use it as a standalone PSU in future)This wire will definitely be short.So u may add some wire to extend it as u may have to place this PSU outside the CPU cabinet,but do insulate the joints.Then cut away the green and the black wires from the main psu in the same way,strip away a little length of the insulation each from the 4 pieces of wires u obtain after cutting.Take the two wires from the second psu and join the green and the black wires to their respective coloured wire of the main psu, and then twist them around the wire that is coming from the connector correspondingly.Insulate all the bare ends and you are done.