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Revodrive X2 = Does it matter which PCI-E slot is used on E770?

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enyceedanny
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2010/12/02 20:32:09 (permalink)
I just received and set up the Revodrive X2. Everything seems good, but I do notice some drops in FPS.. I'm wondering maybe the drive is interfering with the Videocard? Or maybe I'm just being crazy...
 
I have a single 5970 on the top slot. And the Revodrive is on the 3rd PCI-E slot.

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    owcraftsman
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    Re:Revodrive X2 = Does it matter which PCI-E slot is used on E770? 2010/12/03 08:44:44 (permalink)
    There is no doubt the REVO will use available lanes the PCIe bus and it stands to reason that could interfer with other devices on the same bus. Looks like you also have a sound card on the same bus all of which will compete. You might check in bios to see your IRQ assignment to make sure not to many devices on the same interrupt.
     
    To view your current IRQ assignments in Windows 7 
    1. Click on START,
    2. type Device Manager then click enter 
    3. Click the "View" tab"
    4. from the drop down select "Resources by connection" 
    5. expand "Interrupt request (IRQ)"
    This should produce a list the number in parentheses associated with each entry will be the assigned IRQ 

    Unfortunately there is no way to change the IRQ assignment in an AHCI system except by changing the slot it's in. Even doing that doesn't necessarily change the IRQ assignment but it might so trying it can't hurt. You could change the system HAL from AHCI but that would invole reinstalling windows in order for things to work and confilicts can and will arise that would have to be handled manually. An AHCI system is designed to eliminate these conflicts and tends to lump things together on the same IRQ which is good for one thing but as you may have found not good for the other.
     

    Let's say you went to the trouble of changing HAL at installation (F5) I doubt you would see substantial improvements in regards to performance or any improvement but one can always experiment. If you do let us know how things go.
     
     
    post edited by owcraftsman - 2010/12/03 09:09:01

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    enyceedanny
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    Re:Revodrive X2 = Does it matter which PCI-E slot is used on E770? 2010/12/03 11:28:07 (permalink)
    Below is what it's showing.
    Can you tell anything from it? Should I move it to another slot?
     


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    enyceedanny
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    Re:Revodrive X2 = Does it matter which PCI-E slot is used on E770? 2010/12/03 12:05:31 (permalink)
    How is the PCI-E lanes on the classified3 organized? For instance on the standard Classified without the NF200 chip, it'll go like.
     
    Slot 1 = PCI Express 2.0 x 16 (x8 if slot 2 is occupied)
    Slot 2 = PCI Express 2.0 x 8
    Slot 3 = PCI Express 2.0 x 16 (x8 if slot 3 is occupied)
    Slot 4 = PCI Express 2.0 x 8

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    owcraftsman
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    Re:Revodrive X2 = Does it matter which PCI-E slot is used on E770? 2010/12/03 16:01:18 (permalink)
    Looks like the sil image 3124 is on the same IRQ (16) as all the ICH10R drive are. Not surprising really. Do you see the Silicon Image Sil3124 line, I believe that is your Revo drive. Try the bottom slot on the 770 and see if the IRQ changes. Then test again to see results

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    enyceedanny
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    Re:Revodrive X2 = Does it matter which PCI-E slot is used on E770? 2010/12/03 22:09:38 (permalink)
    I tried on the bottom slot and it's the same IRQ.
    Below is the AS SSD test for both slots. You do notice a slight improvement on the 4th slot. But I'm not sure if it was due to it actually being on the 4th slot, or just coincidence.
     
    I may have to do some more testing, but a bit wary about running too much tests due to the obvious reasons.
     
    Note that slot 4 test was performed before the slot 3 test.
     
    Slot 3

     
    Slot 4

     
     
    So what do you think.. Do you think it makes a difference from the information provided so far? 

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    owcraftsman
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    Re:Revodrive X2 = Does it matter which PCI-E slot is used on E770? 2010/12/05 11:56:29 (permalink)
    Keep in mind you can test your SSDs all you want but you will need to restore them to factory condition when all is set to your liking.
     
    Use a basic/minimum configured windows installation to test and figure out what works best. Once you have figured it all out use HDDerase to fully restore the SSDs afterwards reinstall windows. This is similar to what I do when Overclocking that is to say after all the BSODs etc wreck their havoc on a windows installation the need arises. So after I find my system clock sweet spot 100% stable I've planned ahead to reinstall windows.
    Any who FYI I hope it helps!
     
    How to use HDDErase

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    wdflyer
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    Re:Revodrive X2 = Does it matter which PCI-E slot is used on E770? 2010/12/05 13:04:40 (permalink)
     
     
    Recommend you NOT use AS SSD on that drive.
    The following info is pulled from here:

    [link=http://www.ocztechnologyforum.com/forum/showthread.php?79848-THE-BASIC-GUIDE-amp-FAQ-ABC-for-OCZ-SSD&p=567574&viewfull=1#post567574]http://www.ocztechnologyf...;viewfull=1#post567574
     
    Do not use any Benchmark (compressible data) more than once a week.
    Do not use any Benchmark (un-compressible data) more than once a month. 
    Do not use AS_SSD on default settings.
     
     There is also a lot of other good info there as well.
     
     
    Also,  recommend you use the third slot and change your BIOS to the following settings, if you haven't already.
     
    PnP/PCI configurations menu
    INT Pin 3 Assignment = 10
    Reserve RC for bridge = enabled
    Maximum Payload Size = 4096
     
    The attachment shows the typical speeds you can expect to see:
     
    [/link]
    post edited by wdflyer - 2010/12/05 13:08:02

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