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8GB Total, 3.99 GB "Usable"

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August 10, 2011 12:54:33 PM

I'm having a problem with my recent build. I have 8 gigabytes of RAM installed but only 3.99 of it are shown as "usable" while the rest is "hardware reserved" I've done a mem test and everything checks fine, the RAM shows correctly in the BIOS, and the sticks are in the proper positions to utilize "dual channel". I'm using Windows 7 Ultimate 64 bit.

I've checked the BIOS for Memory Hole Remapping but it isn't an available option.

Specs:

OS: Windows 7 Ultimate 64 Bit
Motherboard: MSI 970A-G45
Processor: AMD Phenom II X4 955 Black Edition @ Stock 3.2GHz
RAM: G.SKILL Sniper 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBSR
Storage Device: OCZ Agility 3 AGT3-25SAT3-60G 2.5" 60GB SATA III MLC Internal Solid State Drive (SSD)
Graphics Card: XFX HD-685X-ZNDC Radeon HD 6850 1GB 256-bit DDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity

I also have a Spinpoint F3 as "primary storage".

I've checked and my motherboard most definitely supports more than 8GB (Up to 32GB)

Screenshot of "System" screen and Resource Monitor: (I did Windows Experience Index after this screenshot was taken and received a 7.3)

More about : 8gb total usable

a c 347 } Memory
August 10, 2011 1:03:07 PM

The BIOS is turning-off 1 stick. Simple first verify the following:


Next, increase the DRAM Voltage -> 1.55v~1.60v, and CPU NB Voltage -> 1.25~1.30v.

I assume DDR3 1600MHz 9-9-9-24-2T @ 1.50v:

DRAM Frequency - > DDR3-1600MHz

Optional:
Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 9
tRCD -> 9
tRP -> 9
tRAS -> 24
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August 10, 2011 1:20:31 PM

I checked and completed all of the above and I'm still receiving "3.99 GB Usable".
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Related resources
a c 347 } Memory
August 10, 2011 4:03:20 PM

Try Jumper method - Clear CMOS; page 2-17. Sorry I was out of the office...

I assume the 2x4GB is installed in the 'Blue' DIMM slots {DIMM 2 & 4}, you can 'try' 'Black' DIMM {1 & 3}.

To rule-out a bad DIMM slot: Boot with 1 stick DIMM 2 only then DIMM 4 only, in either case verify that the RAM is properly and securely seated. Failure indicates 'bad' DIMM slot.

If the DIMM slot fails - dampen the RAM contacts with Isopropyl alcohol, insert in DIMM damp, remove RAM clean/repeat, remove and allow to dry 5 minutes, re-install and boot. Production oils are supposed to be removed from the DIMM contact wire.

--

Otherwise, if you are using an aftermarket HSF and if there's any metal to MOBO contact e.g. metal backplate then this too has been know to cause a grounding short.

Screw -> | Metal Backplate | Plastic Washer | [MOBO] | Etc...
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August 10, 2011 5:31:59 PM

Tried all of the above to no avail.

All four of the RAM slots show the correct RAM amount and work properly with it in but when using both sticks I get "3.99 GB usable"

I tried breadboarding it and making sure nothing metal was touching the mobo but with no change.
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a c 347 } Memory
August 10, 2011 5:45:19 PM

What HSF?

edit: Since breadboarding -> re-install the Stock HSF...

Also, if you either 'upgraded' the OS from 32-bit -> 64-bit OR have a HACKED WAREZ Windows 7 then many/most are actually 32-bit made to look 64-bit.
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August 10, 2011 5:46:27 PM

It's the one included with the processor.
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a c 347 } Memory
August 10, 2011 5:52:51 PM

Also, if you either 'upgraded' the OS from 32-bit -> 64-bit OR have a HACKED WAREZ Windows 7 then many/most are actually 32-bit made to look 64-bit.
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August 10, 2011 5:53:54 PM

It's a legally purchased, clean install of Windows 7.

Is it possible that underclocking it to 1333MHz would have an effect? I had read that AMD processors aren't made to work with 1600 by default.

Edit: That fixed it :D  Is there a noticeable difference between 1333 and 1600 or will the underclock cause any negative effects on the hardware itself?

Thank you for all of your help, I'm truly grateful.

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a c 347 } Memory
August 10, 2011 6:44:18 PM

Your 955 BE is indeed 64-bit and can run 1333 or 1600 MHz RAM. No 1333 MHz has zip to do with this issue 1333 or 1600 MHz + 955 BE, which leads me to ask --- did you try the BIOS settings above as I recommended? IF you indeed did use the Jumper method per above then the RAM is running at 'SPD' 1333 MHz.

As I said, the BIOS 'sees' all the RAM.

Just to check, I assume that you have (2) Program Folders; see -> http://www.online-tech-tips.com/wp-content/uploads/2010...

My assumption is one of the sticks is indeed 'bad'. How many passes of Memtest? Were ALL Tests Pass = no errors and with 8GB being tested?

Next, I assume that you installed ALL of the MSI Drivers for Windows 7 x64 -> http://us.msi.com/product/mb/970A-G45.html#/?div=Driver... especially the ATI System Drivers.

You can try DCT Unganged Mode -> Ganged & Unganged; if that fixes the issue then the RAM is ether bad or incompatible with your MOBO + CPU.

---

Otherwise it's time for an RMA of the RAM :( 
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a c 347 } Memory
August 10, 2011 6:46:08 PM

eddie12390 said:
Edit: That fixed it :D  Is there a noticeable difference between 1333 and 1600 or will the underclock cause any negative effects on the hardware itself?

Thank you for all of your help, I'm truly grateful.

http://img856.imageshack.us/img856/2706/memoryfixed.png

What fixed it exactly?
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August 10, 2011 6:52:43 PM

jaquith said:
What fixed it exactly?


Manually setting it to 1333 MHz.

As soon as I booted Windows with that though it became extremely unstable and I got two blue screens, one for PFN_LIST_CORRUPT and one for IRQL_NOT_LESS_OR_EQUAL. (Neither of which I received prior to changing the MHz)
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a c 347 } Memory
August 10, 2011 6:55:17 PM

Did you ever --->>> DRAM Voltage -> 1.55v~1.60v, and CPU NB Voltage -> 1.25~1.30v

Then add to the mix:
DRAM Frequency - > DDR3-1600MHz

Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 9
tRCD -> 9
tRP -> 9
tRAS -> 24
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August 10, 2011 6:58:24 PM

jaquith said:
Did you ever --->>> DRAM Voltage -> 1.55v~1.60v, and CPU NB Voltage -> 1.25~1.30v

Then add to the mix:
DRAM Frequency - > DDR3-1600MHz

Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 9
tRCD -> 9
tRP -> 9
tRAS -> 24


I did all of that but it didn't seem to have an effect.

Edit: I don't know if it matters but it may be worth noting that I only have a 500 watt power supply.
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a c 347 } Memory
August 10, 2011 7:25:33 PM

IF you don't OC then 450W is the minimum PSU; AMD Phenom II + (1) HD 6800 + 3 Drives {SSD + HDD + DVD}.

Voltages: DRAM Voltage/ SB Voltage/ NB Voltage/ CPU Voltage/ CPU-NB Voltage
NB Voltage {Chipset} is NOT the same as CPU-NB Voltage {IMC}!

Okay, in CPU-z SPD tab what are the JEDEC CAS and Voltage of Frequency approximately 667MHz? CPU-z -> http://www.cpuid.com/softwares/cpu-z.html
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a c 347 } Memory
August 10, 2011 7:50:51 PM

Okay, so DDR3 1333 MHz CAS 9-9-9-24-2T @ 1.50v.

Next, what BIOS are you running? Use the 'Mainboard' tab. Often 4GB/stick density requires 'one of' the latest BIOS. This has been especially true for AMD.
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August 10, 2011 7:59:12 PM

The only information I have is that it's American Megatrends and version 1.0. There were no other BIOS updates for this board.
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August 10, 2011 10:41:17 PM

hOLA, TENGO EL MISMO PROBLEMA, CON LA MISMA PLACA, SOLO QUE TENGO UNAS MUSHKIN 2*2GB en dual chanel a 7-9-7-24

tengo un phenom be 550 y un ssd agylity 3.

En sistemas me dice:
Ram 4GB (1.99 utilizable)

no se que hacer, lo de msconfig no funciona
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August 10, 2011 10:50:13 PM

Just in case anyone didn't feel like translating it, he has the same problem with different hardware.

jaquith, anything further that I can try?
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August 10, 2011 10:54:43 PM

Orco25 said:
hOLA, TENGO EL MISMO PROBLEMA, CON LA MISMA PLACA, SOLO QUE TENGO UNAS MUSHKIN 2*2GB en dual chanel a 7-9-7-24

tengo un phenom be 550 y un ssd agylity 3.

En sistemas me dice:
Ram 4GB (1.99 utilizable)

no se que hacer, lo de msconfig no funciona
My spanish is close to inexistant, but what version of Windows 7 are you running as 2GB is also the limit of Windows 7 Starter. Otherwise it could be the same problem as Eddie.
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August 10, 2011 10:58:52 PM

Zenthar said:
My spanish is close to inexistant, but what version of Windows 7 are you running as 2GB is also the limit of Windows 7 Starter. Otherwise it could be the same problem as Eddie.


That was my first impression. He has 4 gigs but only 2 are being used. (He could be on a 32 bit Windows with a 2GB video memory graphics card, also)
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a b } Memory
August 11, 2011 12:44:11 AM

*IS THERE STILL A PROBLEM?

If there is still a problem, then let us know if running Memtest:
1) shows 8GB of memory installed (8192MB), and
2) Memtest has no errors after running at least two hours?

I'd be glad to help if there is still an issue.
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a c 347 } Memory
August 11, 2011 1:01:16 AM

Spanish -> English
"HELLO, I HAVE THE SAME PROBLEM WITH THE SAME (MOBO) ONLY Have a MUSHKIN 2 * 2GB 7-9-7-24 Dual Channel
I have a AMD Phenom 550 and a SSD OCZ Agility 3.
In systems tells me:
4GB Ram (1.99 usable)
MSCONFIG does not work."


There are a variety of reasons this happens, and having the same MOBO means -- zip.

BTW - I left from work and am home now...
------------------

Lets try slowing the RAM down:

DRAM Frequency - > DDR3-1333MHz
DRAM Voltage -> 1.55v
CPU NB Voltage -> 1.30v

Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 9
tRCD -> 9
tRP -> 9
tRAS -> 24
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August 11, 2011 2:12:34 AM

jaquith said:
Spanish -> English
"HELLO, I HAVE THE SAME PROBLEM WITH THE SAME (MOBO) ONLY Have a MUSHKIN 2 * 2GB 7-9-7-24 Dual Channel
I have a AMD Phenom 550 and a SSD OCZ Agility 3.
In systems tells me:
4GB Ram (1.99 usable)
MSCONFIG does not work."


There are a variety of reasons this happens, and having the same MOBO means -- zip.

BTW - I left from work and am home now...
------------------

Lets try slowing the RAM down:

DRAM Frequency - > DDR3-1333MHz
DRAM Voltage -> 1.55v
CPU NB Voltage -> 1.30v

Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 9
tRCD -> 9
tRP -> 9
tRAS -> 24


I did the above and now it's showing 6.99GB usable. I'm not sure where the other 1GB went, though. xD

As soon as I put the speed back it goes back to 3.99 usable.

Memory Test checked out fine for all 8192 MB

Edit:

After unchecking maximum ram in MSConfig with the above settings from your post I can use the full 8 gigs. If you know a solution I'd be glad to try it but if not I'm satisfied with the 1333 MHz.
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Best solution

a c 347 } Memory
August 11, 2011 2:42:02 AM

Try the following, the overall difference will be nearly 0 between 1600 CAS 9 vs 1333 CAS 8.

Same as before:
DRAM Frequency - > DDR3-1333MHz
DRAM Voltage -> 1.55v
CPU NB Voltage -> 1.30v

Slight OC - call it a tweak:
Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 8
tRCD -> 8
tRP -> 8
tRAS -> 24
Share
August 11, 2011 2:47:42 AM

jaquith said:
Try the following, the overall difference will be nearly 0 between 1600 CAS 9 vs 1333 CAS 8.

Same as before:
DRAM Frequency - > DDR3-1333MHz
DRAM Voltage -> 1.55v
CPU NB Voltage -> 1.30v

Slight OC - call it a tweak:
Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 8
tRCD -> 8
tRP -> 8
tRAS -> 24


Alright, that worked and I'm still showing 8GB. I'm content with the minor difference (that I'd never notice, anyways). I need the extra RAM though for virtual machines and it makes Photoshop faster.
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a c 347 } Memory
August 11, 2011 3:17:16 AM

Unless you're a Borg you'd never notice the difference; it's <1%.

You 'can' try to OC the FSB -> 240 MHz, lower the CPU Ratio and try DRAM Frequency - > DDR3-1600MHz.

3200 / 200 = 16
3200 / 240 = 13.3...

240 X 14 = 3360 or 3.36GHz


BIOS, OC the FSB:
CPU Ratio -> 14
FSB -> 240 Mhz

DRAM Frequency - > DDR3-1600MHz
DRAM Voltage -> 1.55v
CPU NB Voltage -> 1.30v

Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 9
tRCD -> 9
tRP -> 9
tRAS -> 24
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August 11, 2011 3:18:09 AM

Best answer selected by eddie12390.
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August 11, 2011 3:18:31 AM

jaquith said:
Unless you're a Borg you'd never notice the difference; it's <1%.

You 'can' try to OC the FSB -> 240 MHz, lower the CPU Ratio and try DRAM Frequency - > DDR3-1600MHz.

3200 / 200 = 16
3200 / 240 = 13.3...

240 X 14 = 3360 or 3.36GHz


BIOS, OC the FSB:
CPU Ratio -> 14
FSB -> 240 Mhz

DRAM Frequency - > DDR3-1600MHz
DRAM Voltage -> 1.55v
CPU NB Voltage -> 1.30v

Advanced DRAM Configuration /Enter
Command Rate -> 2
tCL -> 9
tRCD -> 9
tRP -> 9
tRAS -> 24


It's working well, I'd prefer not to mess with it :p 
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a c 347 } Memory
August 11, 2011 3:23:08 AM

The info is there -- in case you get in the mood. Good Luck! :) 
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July 9, 2012 6:41:20 AM

hi im having the exact problem you have with the 8gb ram and only 3.25 showing up, i have the exact same pc too!. Could you please give me a step by step on how to fix this as im not to bright with computer talk thanx :) 
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