Windows 8 and 8.1 Forums


Help with reserved memory...

  1. #1


    Posts : 7
    Windows 8 Professional

    Help with reserved memory...


    Hello guys

    I just built a new system with windows 8 and I'm having a small issue I don't know how to fix, if possible to. Thing is, out of 8GB of RAM I happen to have, windows says I can only use 3.95 as the rest are "hardware reserved". I've looked through different posts about it and found no answer as to why this is, so I wanted to know if anyone can help me with this :\ Several of the stuff I've done/checked are:

    - I am running 64bit windows 8 professional, so this isn't a 32-bit limit issue.
    - Both windows and the BIOS recognize 8gb of ram.
    - I have a RADEON HD 6950 graphics card, so those 4gb should in no way be related to video memory. Also this mobo doesn't have an integrated graphics chip anyway.
    - I've already checked max memory in msconfig, it's unchecked.
    - The RAM sticks are set to dual channel in the mobo (Channels 1 and 3 specifically).

    Any idea what the problem could be here? I'm attaching an image of what the process monitor says regarding ram.

    Click image for larger version

      My System SpecsSystem Spec

  2. #2


    Posts : 6
    Windows 8 Pro


    When I have this problem...it is always due to the memory speed the bios is setting for the ram. Since you know how to go into your Bios...I will skip that.

    Go into the bios and find the setting for you Ram speed.
    Drop it down from the freq it is at by one notch. What I mean is if it is say running at 1600MHz then drop it down to 1333MHz.
    Save and reboot into windows and check the hardware memory reserved amount.

    It seems to be an odd quirk with windows 8. Once you have full amount of ram available in windows then you can use the bios to slowly increase the ram speed back up.

    However from many tests there is not much difference between 1333 and 1600 performance wise. Also for me to get my ram at and above the rated speed and it all to be available required me to adjust my CP/NB and HT speeds.

    Hope that helps. Let me know.
      My System SpecsSystem Spec

  3. #3


    Posts : 7
    Windows 8 Professional


    I'm about to try that.

    However, I noticed something else. CPU-Z says I have 8gb of ram... running on single-channel. I tried switching a stick from DIMM3 to DIMM2, just in case, and it still says the same. Any idea why this is and if this could be the issue?
      My System SpecsSystem Spec

  4. #4


    Posts : 6
    Windows 8 Pro


    The single and dual channel selection has made no difference for me. I am an avid overclocker and when I push things to far the ram hardware reserve issue rears it ugly head if I forget to adjust bios ram settings.
      My System SpecsSystem Spec

  5. #5


    Yeah that thing about Dual Channel is highly over rated. I have even seen a drop in performance with it when memory if highly tweaked. If on Gigabyte MB do not use Ganged Mode either. Just make sure you can run memory with Command Rate at T1 and latencies will drop like a rock.
      My System SpecsSystem Spec

  6. #6


    England, Northamptonshire
    Posts : 536
    Windows 8.1 Pro 64-bit ; Windows Server 2012 R2 Standard


    Quote Originally Posted by Tizzysawr View Post
    I'm about to try that.

    However, I noticed something else. CPU-Z says I have 8gb of ram... running on single-channel. I tried switching a stick from DIMM3 to DIMM2, just in case, and it still says the same. Any idea why this is and if this could be the issue?
    I have had this problem before and the only way that worked for me was to re-run the Windows Experience Index Assesment. To do this just open the attatched folder and open the file for the steps...

    Hope This Helps,
    Josh
    Help with reserved memory... Attached Files
      My System SpecsSystem Spec

  7. #7


    Posts : 7
    Windows 8 Professional


    Hi guys!

    Sorry I disappeared. My PSU was busted (Apparently was the responsible for my old motherboard dying) so I had to get a new one after it died on me on my new system. Once I got it, it turned out the faulty PSU had decided to pull a class act yet again and damaged my new motherboard, so I had to get one.

    I'm running on the new mobo (so far so good, new PSU so no more charles manson numbers for me I hope) and the system seems to locate the 8GB of RAM just fine, no issues at all. Since I've done nothing in particular, I believe the reason my old (new) mobo only allowed me to use 4GB of ram was the PSU acting up and not sending voltage as it should.

    Nevertheless, thanks for your help. I'm posting here mainly so that if anyone comes looking for an answer to this issue they might find yet another possible reason why windows says half their RAM is reserved.
      My System SpecsSystem Spec

  8. #8


    England, Northamptonshire
    Posts : 536
    Windows 8.1 Pro 64-bit ; Windows Server 2012 R2 Standard


    Thanks for replying back and although costly I am glad your problem is finally fixed!
      My System SpecsSystem Spec

  9. #9


    And once again, the importance of a good PSU is proven and underscored. It's not so much about the power but quality of current without too much fluctuation. Lousy, cheap PSU do not have enough regulation and filtering stages and when loaded could produce large voltage spikes that can wreck havoc with highly sensitive circuits that computer parts are comprised of.
      My System SpecsSystem Spec

  10. #10


    Posts : 7
    Windows 8 Professional


    Actually, my old PSU was a 600W thermaltake that had never caused me any problems - in fact, whenever we had short power outages/voltage variations all pcs in this house (all of them using generic PSUs but mine) would restart except for mine, which would go on as if nothing had happened. I just guess I was the one in a thousand for whom a certified PSU actually started burning down pieces instead of just dying quietly as it should've done.

    I have replaced it with a 650W Corsair one, not so much because the Thermaltake was bad - It worked perfectly during 6 years of heavy duty and I think the way in which it died was bad luck, not poor manufacturing - but because I looked into it and Corsair seems to be pretty much the way to go if you want a PSU that's guaranteed to be good.
      My System SpecsSystem Spec

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