ATI Radeon HD 5870 failing to detect displays randomly during reboots

Question

Hello,
I have a Mac Pro 1,1 A1186 computer, MAC OS X 10.6.6, and I just updated the ole 7300 video card to an ATI Radeon HD 5870 I just purchased from the Apple Store last week.
Problem: Mac OS X 10.6.6 keeps losing the display settings during reboots and fails to detect one of the monitors (the Acer X233H) randomly upon reboots. I tried using two Mini DisplayPort to DVI Adapters, but when that produced undesirable results I just plugged one of the monitors into the DVI diplay port and used just one of the Mini DisplayPort to DVI adapters. Then I tried swapping the monitors around.
I know both monitors and cables that directly connect to the monitors work fine as *they worked on the 7300 adapter*. I'm not using an Apple display, so I'm wondering do I have a bad card or is this common?
I tried reseating the card, completely disconnecting it and reinstalling it. I have both power cables plugged into the card, and both monitors will come up eventually if I keep rebooting my system (if they didn't come up the first time).
Please help... this whole experience is ruining my buzz for purchasing such a kick butt OEM card from Apple. Thank you very much in advanced.
I have 14GB of RAM, 2TB Western Digital (for backup/archival purposes), and an SSD Patriot Torqx 128GB Drive. The Diagnostics state they passed, and everything else works fine except for the display detection.
Here is the setup of the monitors I'm using:
Chipset Model: ATI Radeon HD 5870
Type: GPU
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 1024 MB
Vendor: ATI (0x1002)
Device ID: 0x6898
Revision ID: 0x0000
ROM Revision: 113-C0780C-194
EFI Driver Version: 01.00.436
Displays:
Acer X223W:
Resolution: 1680 x 1050 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Mirror: Off
Online: Yes
Rotation: Supported
ACER X233H:
Resolution: 1920 x 1080 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Display Connector:
Status: No Display Connected

Answer 1

OK, I took your advise and tried the "active powered" adapter last night. No dice. The monitor detection still doesn't work even after purchasing the $100 adapter for only 2 displays. Connecting one of the monitors to the DVI display in the back and connecting the other display to the Mini DisplayPort to Dual-Link DVI Adapter.
_This is not the solution as the problem still occurs._
I also tried reloading Mac OS X Snow Leopard last night wiping out everything on the entire partition to be extreme thinking that the system could be confused. I know I could've just deleted the configuration file, but hey... what the heck.
After applying the updates I was able to see both displays again, +_however again they got confused_+.
The end result is from what I believe that the card is inferior in the way it doesn't allow Mac OS X to detect displays properly and or a driver update needs to be issued from Apple to address this issue.
After trying multiple things it would appear that there is only 1 work around as suggest from above (put the computer to sleep). However, to properly fix things we shouldn't have to utilize work arounds.
Important facts that lead me to this conclusion are:
1. Mac OS X 10.6.6 does detect displays properly with the 7300 with no problem.
2. The monitors and cables work properly with the 7300 card, and other systems. So they are not the issue.
3. After installing the ATI 5870 card that's when we I experienced the issues that didn't go away no matter what cable I used or where I plugged the monitors.
a. Thus a $100 cable or a $30 cable worked the same for this issue.
4. Reinstalling OS X 10.6.6 completely and wiping out everything including the display configuration had no bearing on any of this.
Therefore, it can only be two things by deduction:
1. The firmware of the card needs a revision to help support multiple displays.
and/or
2. The driver for the ATI 5870 needs a revision to correct multiple display support within the Operating System.
However, I can't see paying over $500 for a card and an adapter that doesn't work properly. If there is no hope that Apple or ATI is working on this issue with the ATI 5870 card, I have only one recourse and that is not to support this particular ATI product and take it back. I know I can always just keep putting my computer to sleep, but over $500 for a video card and an adapter that is riddled with bugs is way too much for me.
*I'm taking the card back and reinstalling the 7300 until a proper card can be produced or an update is issued to specifically correct multiple display support.*
*Thank you* everyone for your help, I really appreciate it. *+However, the users of the systems can only do so much without proper support from Apple and/or ATI on this issue.+*