ATI & NVIDIA

Hey everyone, I originally posed this question about a month ago and got mixed results. But now that the Mac Pro has been out for a good month+ maybe someone has found a definate result. I am looking to use 4 monitors; 2 crts, 1 regular lcd screen that needs to be rotated, and 1 hd lcd. I currently have the standard Nvidia 7300GT and was wondering if I could shift that to the second pci slot and put in an ATI X1900 XT in the first spot. I am concerned with three things. First, if Mac will have any driver issues or conflicts that will prevent 4 simultanious monitors from two seperate brand graphic cards. Secondly, (the same as the first) but under Windows XP (x64), and finally if there will be any problems rotating the canvas of one monitor.
Any insight would be great. Thanks

Hi,
First off, I too found little information about multiple monitor setups on the Mac Pro. I have a triple monitor setup (ati + nvidia) and posted some of my comments here: http://discussions.apple.com/thread.jspa?threadID=646226&start=0&tstart=0
I have not been able to get the nvidia card to work along with the ati card in windows. I can use the 2 monitors hooked up to the ati card, but not the monitor connected to the nvidia card in windows. This means that I can use windows, it just won't work with monitors hooked up to the nvidia card. If anyone has got this working please post!
Also, I am using Dell LCDs, while another poster in the above mentioned thread using Apple LCDs said he could not get Windows to run properly (resolution issue). I have not tested portrait mode, but don't think it would be a problem.
I am not currently a Final Cut user, so I cannot comment on those questions but otherwise the 3 monitors work OK on the OS X side. I have only worked with 2d apps and have not had any real issues. I was able to run 3 720p HD videos concurrently (1 in each monitor) with no stuttering.
Regarding spanning, if your app is really GPU intensive, it would be best to span across the 2 monitors connected to the ati card.
Regards
  Mac OS X (10.4.8)  

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    The issue is that while play a game the system experiences a short 5-10 second freeze during the game randomly, but usually several times an hour. During this freezing the sound would loop and as suddenly as the freeze occurs it would cease and the game would continue on as if nothing happened. However, sometimes this would result in the system freezing outright after this short 5-10 second freeze... but it does not feel like a total system freeze, but rather a video freeze as the sound continues and I still have keyboard control... but this does require me to force a manual reboot of the machine itself. I have scowered the internet and various forums in an attempt to find what the issue was and use various methods to remedy this issue, but so far nothing has worked in my favor... but it does seem like this issue has been plaguing other users with the MSI Neo2 Platinum motherboard. Below are some of the methods that I have used in an attempt to solve this issue:
    *Default Clock for CPU/Memory/GPU; Over/Under Clock for CPU/Memory/GPU
    *Increased voltages to CPU VID, AGP, and Memory
    *Disabled/Enabled AGP Fast Writes
    *Increased AGP Aperture from 64MB to 512MB
    *Enabled/Disabled ATI/nVidia Speedup option in BIOS
    *Forced AGP clock lock to 66-67mhz
    *Relaxed/Aggressive memory timings
    *APIC enabled/disabled
    *Gate A20 turbo/normal
    *Disabled all unneeded onboard components (Realtek NIC, Sound, SATA)
    *Disabled nVidia MAC and attempted to use 3Com Gigabit PCI card instead
    *Swapped HDD Cables
    *Tried PCI Sound Card (SB Audigy2 ZS Gamer) in PCI Slots 3/4
    *Tried video drivers from 71.89 Official to 76.45 beta modified drivers
    *Tried 5.10 official nForce drivers to remixed 7.02 nForce drivers (5.10 drivers uses 4.36 GART, higher drivers uses the 4.40 GART)
    *Applied all the latest updates from Windows Update Website
    *Reinstalled Operating System (Windows XP SP2) 5 different times clean with various settings (APIC on/off, etc...) and different drivers.
    *Installed Audio Card (SB Audigy2 ZS Gamer) with older and the latest drivers available from Creative's website
    *Replaced PSU (Previously was a Thermaltake 420watt PSU, 18A +12v) with a OCZ Modstream 520watt PSU (28A +12v)
    *Video card is KNOWN working from previous build (AMD XP 3000, Abit NF7-S)
    *Hard Drive is KNOWN working from previous build
    *CD/DVD-ROM drive is kNOWN working from previous build
    *Heat is not an issue... all components temperature is well below rated level, the only unknown is the chipset temperature (it has a active heatsink and seems to not be hot to the touch, applied AS5 to it anyway)
    *Used latency tweak to the video card
    *Used Rivatuner to force constant performance level
    *Tweaked BIOS to force even clock rates and forced 1.4v to the GPU Core
    *Used original GPU BIOS
    *Used MSI Neo2 K8N Bios 1.4 - 1.8 and modified BIOS 1.8
    *No background applications are running (not even antivirus)
    *Used application to force maximum refresh rates for my monitor
    *Memory passed MemTest86+ for over 24 hours
    *System passed Prime95 and SuperPi for over 24 hours
    *System seems stable in all non gaming related applications
    *Checked through various troubleshooting procedures
    *Disabled SBDRVDET.EXE using MSCONFIG
    *There are no IRQ conflicts outside of PCI system management sharing IRQ11 with the NIC and USB... in APIC there are no IRQ conflicts what so ever. Regardless neither method worked
    *Installed AMD 64 drivers from AMD
    *Disabled DEP in boot.ini
    *...and many other various tweaks and modifications.
    System Specifications
    CPU - AMD 64 3200+ "Winchester", using Thermaltake Silentboost K8 and AS5
    Motherboard - MSI Neo2 K8N Platinum (nForce3 250GB Ultra) - Using Bios version 1.8
    Memory - 2X 512MB Corsair XMS TwinX1024-3200C2PT (2 Modules, Memory Slots 1 and 2 used)
    Audio - Sound Blaster Audigy2 ZS (PCI Slot 3 used)
    NIC - Onboard nVidia MAC, Disabled Realtek NIC
    Video - XFX Geforce 6800NU 128MB AGP (BIOS Rev 1) - NV Silencer 5 and AS5
    Case - Thermaltake Damier Series 5000
    PSU - OCZ Modstream 520watt (28A +12v rail)
    HDD - Western Digital 1200JB 7200rpm IDE
    DVD-ROM - Lite-On 16X DVD-ROM
    Floppy - Mitsumi 1.44MB 3.25"
    OS - Windows XP SP2/DirectX 9c
    I have been fighting this issue for well over a month now and I am frankly nearly out of ideas, this does not necessarly prevent me from playing games, but this does interfere with the games I do play (especially online games). I do demand absolute stability from the games that I play and this issue only began AFTER I upgraded to the new motherboard, processor, and memory. The only thing I have not tried is something that I do not have access in attempting on this motherboard, and that is increasing the voltage to the chipset.
    Here is my theory on what is going on is that I believe is there is a fault with the chipset on this motherboard and this is manifesting itself while I am playing various games on this system. Of course I would like to try increasing the voltage to the chipset as that would increase stability, but there is no option in BIOS to increase the chipset voltage like the previous motherboard I had (Abit NF7-S). It is possible that either a) the chipset is at fault and is causing me this issue or b) the chipset is not recieving enough voltage.
    My question to the rest of you is this, what do you think the problem is and what ideas do you have that I may try that I have not tried yet. Additionally if there is nothing else that I may try should I attempt to RMA this motherboard and will that help, and is there any other versions of this motherboard that I should be aware of. I would appreciate any response from a MSI representative and any comments from those that may have positive suggestions for my issue. Thank you in advance for your time and any help that you may be able to render.
    The GameMaster...
    *EDIT* Added additional methods attempted... (there was a lot... so I did not remember everything that I have tried)

    Quote from: dacull on 25-May-05, 16:06:33
    Does it only happen in online games, or can it happen in all games? One thing to make sure of is to turn off CRC checksum offload in your NVidia MAC properties (everyone do this, it is incorrectly calculating checksums which leads to servers ignoring your packets). However as you have tried a different network card you can discount this theory.
    For me it looks like the biggest culrpit is your 6800NU, i have read alot of bad things about the NU and you have a low bios revision there, just because it worked well against your old chipset doesnt mean it will work well against your current chipset. Sounds like a BIOS fix is needed as some timing is out somewhere.
    Ensure Spread Spectrum is off (and as you have already pointed out Fast writes, ATI NV Speedup) and your card is running at default clock.
    As a test beg/borrow/steal another graphics card (preferably nvidia) and see how it goes so you can narrow in on your video card.
    It is not just one game, but it is more prodominate in certain games than others... the game in question here is Planetside... though I stuck a demo of Unreal Tournament 2004 on a loop bot match and it seemed to have locked up after 4 hours (not sure how many times it experienced that 5-10 freeze as I went to bed). As for the video card it was KNOWN working from a previous build in those same games (Previous build was a AMDXP3000 and a Abit NF7-S nForce2 motherboard). The only components different in this build is the AMD64, the MSI Neo2 K8N, 2 new sticks of Corsair XMS to replace the Corsair ValueSelects, and the SB Audigy2 as I would never use a software codec audio solution. Spread Spectrum is LOCKED in BIOS and disabled... ATI/nVidia speed up was disabled from the start... and I tried the Video Card at default clock, over clocked, as well as under clocked and the same issue resulted... as I said before it is NOT the video card.
    There are two other things I could try is use my old Geforce4ti 4200 and see what happens... or even try out WindowsXP 64-bit edition as someone earlier suggested. I wish I could find a new BIOS for my XFX 6800NU, but there there is only the revision 1 BIOS that I was able to find. The mystery continues...
    The GameMaster...

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