This post will show you how to connect your OCZ ModXstream (780 and 900W) PSU to your motherboard. Both 24 pin and 20 pin motherboards are supported by this PSU.
I am posting this guide using the 900W model. These PSUs's are modular, so we will cover connecting the PSU to the motherboard as well as connecting the cables to the PSU itself.


The first part of this post is for motherboards that utilize a 24 pin Main ATX connector. If your motherboard does not have a 24 pin connection (Older Socket 478 systems, AthlonXP systems, some Socket 939 systems) then please scroll down to the section "Motherboards with 20 pin ATX Connectors".

To start off we have pictures of the cables that are hard-wired to the PSU, these cables are not modular. We have the 20/24 pin, a pair of 4 pin CPU connectors, and a pair of PCI-e power connectors.





Here are all the modular connectors on the PSU body, you can also see the hard-wired bundle.


Now we move on to the included modular cables. You only need to install what your system will need, which is quite nice, no more unused cables in the case.

The first connector next to the hard-wired bundle is an 8 pin connector and can utilize 2 different peripheral cables, based on your system needs.
This first picture shows that another pair of CPU power connectors can be attached.
One or both of these would be used if your motherboard had a second CPU Socket.


The Second cable that can be attached in the 8 pin slot, is another pair of PCI-e power connectors for Video cards. Bringing the total up to 4 PCI-e connectors.


The next pair of modular connections are for the SATA power cables, there are 2 cables with a total of 6 SATA power connectors.


The last 3 connections on the PSU are for Molex and "floppy" power. There are 3 cables available with 2 molex and 1 "floppy" connection on each cable, for a total of 6 molex and 3 "floppy" connections.



That concludes the connections on the PSU itself, now we move on to getting the PSU connected to the Motherboard.

First we show the Main ATX connection on a 24 pin motherboard:


There is only 1 way that the 4 pin and the 20 pin will go together. Just like our GameXstream and StealthXstream, you put the "24" to the right of the 20 pins as shown in the first picture in this post.

Next we have the connection for CPU Power. This board has 8 pins for CPU power (If your board only has a 4 pin, then you will use the P2 connector, see further down in the section for a 20 pin motherboard), so we will be using both 4 pin connectors. P2 goes into the first 4 pins of the connector and it only fits in the correct place, it will not go in the "wrong" 4 pins.

The P2 connector properly installed in the 8 pin Socket, followed by all 8:




Now, if your graphics card requires a PCI-e power connector, here we have some shots of the PCI-e lead installed on the video card:




Motherboards with 20 pin ATX Connectors

Now we are going to show the PSU connections needed for systems that only use a 20 pin Main ATX connector.
Since 4 pins of our Main ATX connector are detachable, we just leave them unplugged from the motherboard:


This next picture shows the CPU power connection when only 4 pins are used. You use the separate 4 pin CPU connector marked "P2" from the permanently attached bundle on the PSU.


That concludes this tutorial for connecting your new ModXstream PSU from OCZ. We hope you enjoy your new Power Supply.
If you have any problems or questions about your new installation, please post in our PSU support forum located here: http://www.ocztechnologyforum.com/fo...splay.php?f=56

If you have compatibility or purchase inquiries about a new OCZ PSU, please post those questions here: http://www.ocztechnologyforum.com/fo...splay.php?f=90