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Hardware Reserved Memory, Tis drivin me nuts

post #1 of 7
Thread Starter 
OK so this issue for me, is resolved, I will post everything relevant in this post, and maybe some one can come and delete the spam I made below.

My initial issue was that Windows 7/8 (I tried upgrading) Would only show 4 out of the 8GB of memory I had installed on my computer as available, and the rest was under "hardware reserved" in resource monitor, which meant it was not available to windows. (I might take some pictures of it later).

(Alt+Ctrl+Del --> task manager ---> Performance ---> Resource Monitor---> Memory)

also shown in start--->right click computer---->properties


At first I thought it was random, because some times it would not do it, but I soon found out that windows allocated my memory differently based on what Memory frequency/latency/north bridge frequency/North bridge voltage I set it to in my bios.

Another note is that having my ram in unlink mode, as opposed to link mode, allowed me to clock my system a little bit higher before windows would screw up.

Also, I have seen many posts that give other ideas on how to fix this, all of which did not work for me:

-Changing max memory in start-->msconfig--->boot--->advanced
-update the bios and system drivers
-change the memory remapping feature in the bios
-download rammap and check where the memory is going to
-if you have 2 sticks in dual channel mode, move one of them to another channel, then let the bios post, and hit the power switch on the power supply, then put it back and reboot.

Another thing to note is that windows took some of that memory and allocated it to my video card as shown in start--->dxdiag. the odd thing about it is even tho right now I have all 8gb available, windows i currently showing 8GB of memory for my video card in dxdiag. All I can say is, as long as the memory is available -_-

(you can also see memory in Start-->Right click my computer---->properties---->Windows Experience Index---->View and Print Detailed Performance and System Information (you must run or refresh your experience index first)

So having been through all of this my final solution was to toy around with my ram/north bridge settings to get the highest clock rates while still having ~8GB available in windows. Listed is the maximum speed I can get my setup to.

Ram multiplier at 1866:


MAX (4GB at anything over 200 front side bus)

Ram, 1866MHz at 1.5v
North Bridge 2000MHz at 1.2v (x10 multiplier)
Front Side Bus at 200Mhz
Unlink mode
Latency 9-10-9-24-2T

Ram Multiplier at 1600:

MAX (4GB at anything over 200 front side bus)

Ram 1600Mhz at 1.5v
North Bridge 2400MHz at 1.2v (x12 multiplier)
Front Side Bus at 200MHz
Unlink Mode
Latency 9-9-9-24-1T


Ram Multiplier at 1333, NB at x12 Multiplier:

MAX (4GB at anything over 245 front side bus)

Ram 1632MHz at 1.5v
North Bridge 2940MHz at 1.2v (x12 multiplier)
Front Side Bus at 245MHz
Unlink Mode
Latency 9-9-9-24-1T

Ram multiplier at 1333, NB multiplier at x11:

MAX (system crash at anything over 260 front side bus)

Ram 1732MHz at 1.5v
North bridge 2860MHz at 1.2v (x11 multiplier)
Front Side Bus at 260MHz
Unlink Mode
Latency 9-10-9-24-2T

Some things to note are that my north bridge multiplier will not go over x12 on any setting, and that my maximum front side bus is 260MHz. Out of these three the bottom setting gives me the best benchmarking results. Also I like it because that means I can get more MHz out of my cpu multiplier smile.gif, I have not tested these settings for stability yet, this is just my initial "didn't crash, I have 8GB" test.

Also just a word of warning. Raising the front side bus frequency also raises your processor speed, north bridge speed, HT Link speed, and memory speed. what I did was lowered the multipliers for the ones I wasn't interested in and tried to keep them at default speeds I also only increased the front side bus 5MHz at a time, then checked windows for my available memory.

I can't think of any final notes but I hope this helps anyone out there with similar problems smile.gif

One final update to this thread:

I decided to turn my HT Link down to 2000 from 2600, which is what my bios liked to default it to, and upped it to 1.2v, cause once again my bios defaulted it to 1.092v Doing this opened up even more options for me.

The final nail in this coffin is....

I set my ram/north bridge to what I want it to be, then set all of my latencies to auto. the bios set them to some ridiculous number, like 9-13-13-37, but it worked smile.gif I have my ram at 1880, north bridge at 27??, and I am happier than a pig in poop.
Edited by jonpad01 - 4/6/13 at 10:49pm
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post #2 of 7
Thread Starter 
you know what, i think i just figured it out.

http://www.anandtech.com/show/2850/20

even tho i reset my ram settings i didn't fully shut down the computer, and I think it is the same problem with the Intel boards, either way at least it works some times.
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post #3 of 7
Thread Starter 
ok so I think i finally got this fixed. according to some sources, my problem was that I decided to boot windows on the same install after installing both my new ram and cpu at the same time. this must have caused some errors for windows, cause I just reinstalled windows 7 ultimate 64 bit and it seems to be working. I have my ram clocked at 1800MHz at 1.503 volts. And my north bridge at 2700MHz at 1.2 volts. This may not be completely solved, so if i encounter the same thing again I will post it.
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post #4 of 7
Thread Starter 
OK so it looks liek I DID NOT fix this problem. Once again after a shut down and restart, windows decided to allocate 4GB to hardware reserved. frown.gif

I suppose I could just keep rebooting until I get a boot that doesn't do it....I think my next step is to get windows 8.
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post #5 of 7
Thread Starter 
OK so I have been doing a bit more research, and I found this:

Start -> Right click My Computer -> properties -> windows experience index button -> print and view detailed performance and system information

this is what it shows


This board does not have a on board video card, yet windows is allocating 4GB of memory to my dedicated GTX 460. So the question is....why?
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post #6 of 7
Thread Starter 
well after a bit more testing in the bios, I have come to the conclusion that windows allocates this memory differently based on different clock rates and latencies. I decided to put the FSB down to 200 (from 225) and up the ram multiplier up to 1866. Now windows says that 7.5GB is usable, and that its allocating 4GB of it to my video card, which is fine with me as long as windows can use all 8GB. AFAIK it will re-allocate that memory to other programs when needed.

In the long run, I don't think this is really an issue, tho it is interesting. I was really hoping to overclock to the max but it looks like I'll only be going to 1866 frown.gif

Also, AFAIK this is actually an issue with the bios, and not windows, so maybe a new bios update from msi will fix things.

EDIT

in system it shows 8GB (7.24GB usable)

also, I hope this bit of research helps to clear up some stuff for people with similar problems smile.gif
Edited by jonpad01 - 4/3/13 at 9:29pm
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post #7 of 7
Thread Starter 
OK another update to the thread that's just me talking to no one -_- I have the option in my bios to set my ram to link, or unlink mode. when I have my ram clocked high enough to make windows hate me, I jut set it to unlink, and now I have 7.24Gb off ram available smile.gif

EDIT

I have also noticed that windows will do the same thing when I exclusively overclock my North Bridge just by itself.
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