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[Solved] Windows 7 64b recognized 8gb memory, but says only 4 usable

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September 25, 2010 1:05:34 AM












Well i knew something was wrong when i just plugged in 4 more gigs of ram in and got no blue screen or something, i have such bad luck with this stuff.

anyways i had 4 gigs in, and just bought 4 more gigs, made sure it was same ddr3 10666 and 1333mhz just like my other memory, only difference is one is ocz and new stuff is corsair but i know company's shouldnt make the differance, after all windows is recognizing 8 gigs (by right clicking on my computer, and also cpuz shows 8 gigs)

Anyone have any idea? i already checked to make sure that max memory was unchecked in adv boot options so its not that.

old ram PC3-10666 Platinum RAM - 4GB, 2x2GB, 1333MHz, DDR3, Low Voltage, Dual Channel
new ram Corsair XMS3 4GB PC10666 DDR3 Dual Channel 1333MHz

Thank you!
a b } Memory
September 25, 2010 1:22:00 AM

Have you raised your voltage to accommodate for the additional four sticks?
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September 25, 2010 2:07:29 AM

like what voltage should it be raised to?
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Related resources
September 25, 2010 2:15:50 AM

found it and no it didnt help
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a c 347 } Memory
September 25, 2010 2:43:45 AM

^ Yes, the yea olde "mix & match" syndrome.

At best EXACT CAS + Speed + Voltage + "mix & match" is a recipe for disaster!

To determine the WORST of each {which is what you're going to get} - plaese post the exact part-number and/or link for the two (2) different RAM {Platinum & Corsair}.

I can tell you, 90%, your going to have to choose one or the other and RMA one of the kits for a new compatible set.
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September 25, 2010 3:01:34 AM

http://www.tigerdirect.com/applications/SearchTools/ite...

and

http://www.tigerdirect.com/applications/searchtools/ite... <- currently what i had

so if i have to return i would just have to buy the ocz again, the crappy part is i didnt even notice they were still sellign that, or else i would have just bought it for 10 dollars more!

One more thing, probably important that i just remembered from when i put the board together, is when i got it there was a pin bent and i put cpu in hoping it would catch and straigten out, the off chance it didnt straigten out that could seriously be the problem to, right?
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September 25, 2010 4:05:01 AM

Well if the PC is working except for the RAM size then it is likely the CPU is OK. In what way is Win 7 saying saying only 4 is usable? Where are you getting that information and in what context? Keep in mind that if the application involved is 32 bit then it will only see 4 GB RAM. Win 7 will use the rest for caching but the application has to be native 64 bit to see beyond 4 GB RAM.
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a c 347 } Memory
September 25, 2010 4:48:42 AM

I assume that you are running a 64-bit version of Windows {2^32 = 4GB limit}. See - http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx

Diffidently, you do not want any bent CPU pins, and should correct that problem. Be extremely careful not to break-off the pin, and use jeweler's tweezers. In addition, yes a bent CPU pin can cause failure to recognize all of your RAM or simply malfunction in various degrees.

First, observation is that "personally" I would not want to Jerry-Rig the BIOS to find a solution to make this "mismatch" to work, and would do as you stated - exchange. Both the CAS and voltages {particularly Voltage} has a large disparity.
DDR2:
1333MHz DDR3 7-7-7-20 @1.65V - OCZ PC3-10666 Platinum RAM
1333MHz DDR3 9-9-9-24 @1.50V - Corsair XMS3

You can try, to manually set each module setting individually and see if 1.6V - {0.1V} will work.

Run Memtest after find, if possible, a voltage that will accommodate both sets - http://www.memtest.org/ {D/L and create a bootable CD/DVD (ISO/zip)}.

Good Luck!
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September 25, 2010 5:30:11 AM

jaquith said:
I assume that you are running a 64-bit version of Windows {2^32 = 4GB limit}. See - http://msdn.microsoft.com/en-us/library/aa366778(VS.85).aspx

Diffidently, you do not want any bent CPU pins, and should correct that problem. Be extremely careful not to break-off the pin, and use jeweler's tweezers. In addition, yes a bent CPU pin can cause failure to recognize all of your RAM or simply malfunction in various degrees.

First, observation is that "personally" I would not want to Jerry-Rig the BIOS to find a solution to make this "mismatch" to work, and would do as you stated - exchange. Both the CAS and voltages {particularly Voltage} has a large disparity.
DDR2:
1333MHz DDR3 7-7-7-20 @1.65V - OCZ PC3-10666 Platinum RAM
1333MHz DDR3 9-9-9-24 @1.50V - Corsair XMS3

You can try, to manually set each module setting individually and see if 1.6V - {0.1V} will work.

Run Memtest after find, if possible, a voltage that will accommodate both sets - http://www.memtest.org/ {D/L and create a bootable CD/DVD (ISO/zip)}.

Good Luck!



gotcha


also here is what i mean

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a c 347 } Memory
September 25, 2010 5:40:54 AM

Post this:
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September 25, 2010 6:24:56 AM

That is interesting. I have 8 GB installed on this machine and Win 7 reports 8 GB without qualification. There is no usable amount mentioned. I guess this takes us back to hardware specification and branding.
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a c 347 } Memory
September 25, 2010 6:38:50 AM

Lets see the Resource Monitor. Often there "can" be a Hardware Reserved problem for a variety of reasons {e.g. multi-partitioned HDDS, etc}.
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September 25, 2010 9:58:38 AM

yea resource monitor is showing (i took out a stick to see if it was bad memory) but it shows the one stick that is left in there is being used as hardware.

pic:




if it makes a differance i have a radeon 5850 which is 1gb

thanks, hopfully we are getting somewhere
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September 25, 2010 4:04:07 PM

daterxies said:
Well i knew something was wrong when i just plugged in 4 more gigs of ram in and got no blue screen or something, i have such bad luck with this stuff.

anyways i had 4 gigs in, and just bought 4 more gigs, made sure it was same ddr3 10666 and 1333mhz just like my other memory, only difference is one is ocz and new stuff is corsair but i know company's shouldnt make the differance, after all windows is recognizing 8 gigs (by right clicking on my computer, and also cpuz shows 8 gigs)

Anyone have any idea? i already checked to make sure that max memory was unchecked in adv boot options so its not that.

old ram PC3-10666 Platinum RAM - 4GB, 2x2GB, 1333MHz, DDR3, Low Voltage, Dual Channel
new ram Corsair XMS3 4GB PC10666 DDR3 Dual Channel 1333MHz

Thank you!


Go Into Your BIOS And Change The Memory Mapping Hole To The Lower 4GB If Possible, if Anyone Else Knows What Im trying To Say, Please Put It In Simpler Terms I Couldnt Think of Any Other Way TO Explain It Simpler. I Think It May Solve Your Problem
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a c 347 } Memory
September 25, 2010 6:00:22 PM

There are typically (6) explainations: 1. Partitions, 2. Bad RAM, 3. Bent CPU Pin, 4. Bad install (improper DIMM slot/seating), 5. Incompatible RAM (non-certified/non-tested/type/mix-matching), non x64 OS/x64 CPU.

The Windows x64 + CPU x64 "shouldn't have that problem of Memory Mapping; not saying it won't. Ref - http://support.microsoft.com/kb/929605/en-us

Possible fix:

Partitions:
"The problem was to reinstall windows and instead of just formatting the existing partition, to delete the partition and create a new one. This worked for me where formatting the existing partition didn't."

BIOS:
Also some people solve the issue by enable memory mapping in their BIOS.

MSCONFIG:
Uncheck maximum memory and number of processors in MSconfig. RUN msconfig | "Boot" -tab | ("Advanced options") | uncheck [ ] all items } & restart.
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September 25, 2010 6:15:32 PM

ok i just ran memtest and everything passed

and i just noticed (it is reporting only 4 gigs but the 3 sticks)

and i saw

ram i got with the computer is showing at 8500 (but the sticks physically say 10666)

new ram is showing at 10600


could this be it?
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a c 347 } Memory
September 25, 2010 6:52:47 PM

Look at my first post - "yea olde"...
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September 25, 2010 6:56:42 PM

jaquith said:
Look at my first post - "yea olde"...


ok i will just get the same kind of ram, was just hoping could get it fixed sense i orderd it online.

In your opinion what ram is better the OCZ or the Corsair? (for gaming)
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a c 347 } Memory
September 25, 2010 7:01:39 PM

Either - the Fastest with the Lowest CAS -> in this case it is the OCZ.

But first - post your MOBO Model # ; I need to verify Certified & Tested DDR.
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September 25, 2010 7:05:51 PM

jaquith said:
Either - the Fastest with the Lowest CAS -> in this case it is the OCZ.

But first - post your MOBO Model # ; I need to verify Certified & Tested DDR.


thanks


Gigabyte EX58-UD3R Motherboard - Socket LGA1366, Intel X58, ICH10R, ATX, PCI-E 2.0, CrossFireX, Giga
Sku No. 4410099 - Manufacturer Part No. GA-EX58-UD3R
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a c 347 } Memory
September 25, 2010 7:26:30 PM

First, you have a Tri/Hexa Channel MOBO and DDR needs to be installed 3X__. So in your case, neither DDR shows up as either {Certified or Tested}! So, I'd be a fool to say one or the other; for me I would exchange the Corsair, and get all new Corsair TR3X6G1600C8D - http://www.tigerdirect.com/applications/searchtools/ite...

Gigabyte Certified {GA-EX58-UD3R (rev. 1.7)} - http://www.gigabyte.us/products/product-page.aspx?pid=3...
TW3X4G1333C9A
Corsair {Tested} - http://www.corsair.com/configurator/product_results.asp...
OCZ3P1333LV4GK
OCZ {Tested} - http://memoryselector.cnetchannel.com/ocztech/result.as...

GA-EX58-UD3R - http://www.gigabyte.us/products/product-page.aspx?pid=3...

Good Luck!
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September 26, 2010 12:24:24 AM

Alright i ordered the 6 gigs of that and requested a RMA for other stuff... wifey is gonna be like wtf 200 dollars for memory but oh well, its really only 100ish after stuff gets returned ;) 
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a c 347 } Memory
September 26, 2010 2:58:39 AM

Tell your wife is the $100 worth protecting our: Finances, Photos, Work, Memories, Research, etc. People often forget what an important roll the PC is.

{Got a wife too...} ;) 
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September 29, 2010 3:24:24 AM

Well got the new ram put it on in and same thing. So i am convinced that its my motherboard that something is wrong with... possibly the bent pins where cpu goes, as far as straightening them they are so small i can barly even see them pins, so i might just have to suck up a new motherboard. :cry: 
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a c 347 } Memory
September 29, 2010 4:02:20 AM

^ Okay - possibly the arrangement:
{CPU} | New | Old | Old | New |

Reason: Channel 2: DDR3_2, DDR3_3

{CPU} 1 | 3 | 2 | 4 |

If failure then:
{CPU} | Old | New | New | Old |
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September 29, 2010 5:09:02 AM

ok sorry if im not understanding correctly its late. But remember its 3 x 2gb sticks and im not gonna use any of my old ram.

According to the mobo book it says i should do this for triple channel :

{CPU} | x | empty | x | x |
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a c 347 } Memory
September 29, 2010 6:26:16 AM

^ {CPU} | x | empty | x | x | is correct for (3) sticks.

I emailed a guru buddy of mine, so 6 GB installed - but 4 GB recognized. Post back tomorrow.
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September 29, 2010 8:16:09 AM

I had that problem before , but after updating the bios it gone.

so try to update the BIOS
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September 29, 2010 1:45:12 PM

hopecord said:
I had that problem before , but after updating the bios it gone.

so try to update the BIOS


yea i already updated bios, i saw in one of the releases that it updated support for ram and i was so hoping that was it, but unfortunately it was not :( 


Thanks for everyones help so far it is greatly appreciated
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October 1, 2010 10:23:38 PM

Bought a new mobo, recognized the ram right away. so was the mobo.

thanks for all the help
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!