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16 gb installed, only 3.95 usable (Solved)


Best Answer Xeiconfinsha , 09 November 2015 - 11:41 PM

Alright, I finally figured out the problem. I was using a corrupt RAM stick, with each new ram I got. Yep, a series of unfortunate luck. When I went to buy new ram, one stick was busted, when I ret... Go to the full post »


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#1
Xeiconfinsha

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so how do I up this to make it fully run 16 gigs?

I know this must be a newbie question but yeah.. i don't know.

here's the specs

These are the specs

 

Windows 7 Ultimate

SP 1

Processor AMD FX ™-4100 Quad-cor processor 3.60 GHz

 

Installed Memory (RAM): 16.00 GB (3.95 GB usable)
System type: 64 bit opreating system

Pen and touch (no pen and touch)


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#2
iammykyl

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Gday Xeiconfinsha

We need more info,Please download then run Speccy (free) and post the resultant url for us, details here,  this will provide us with information about your computer hardware + any software that you have installed


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#3
Xeiconfinsha

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http://speccy.pirifo...CzsX8vqOL0AyMG4


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#4
iammykyl

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Thanks for the info.

A possible cause of your issue is having mixed speed RAM, it is also mixed in the wrong DIMM channels.   See your MB manual page #15.

Slot #1 and #2 show  CMZ8GX3M2A1600C9 > http://www.corsair.c...mz8gx3m2a1600c9

Slot #3 and #4 show  CML8GX3M2A1866C9 > http://www.corsair.c...mz8gx3m2a1866c9

The RAM is running in single channel mode instead of Duel channel mode and only the stick in slot #1 is available for use.

You can mix RAM of different speeds, but the timing must match.   Look at the RAM listed in SPECCY, the only highest spped with matching timing is,

JEDEC #3   Frequency: 666.7 MHz   CAS# Latency: 9.0   RAS# To CAS#: 9  RAS# Precharge: 9  tRAS: 24  

 

 

We need first to set the BIOS to defaults.

Turn off the PSU.

Remove all the RAM.

Use the Clear CMOS Jumper, page #28 MB user manual. this will reset the system configuration.

Install two sticks of RAM, the PC3-12800 (1600MHz) in slot #1 and slot #3

Check that the clear CMOS jumper is back to Keep Data.

Turn on the PSU, power up.

How much memory is now available?

 

 

 


 

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#5
Xeiconfinsha

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Thanks for the info.

A possible cause of your issue is having mixed speed RAM, it is also mixed in the wrong DIMM channels.   See your MB manual page #15.

Slot #1 and #2 show  CMZ8GX3M2A1600C9 > http://www.corsair.c...mz8gx3m2a1600c9

Slot #3 and #4 show  CML8GX3M2A1866C9 > http://www.corsair.c...mz8gx3m2a1866c9

The RAM is running in single channel mode instead of Duel channel mode and only the stick in slot #1 is available for use.

You can mix RAM of different speeds, but the timing must match.   Look at the RAM listed in SPECCY, the only highest spped with matching timing is,

JEDEC #3   Frequency: 666.7 MHz   CAS# Latency: 9.0   RAS# To CAS#: 9  RAS# Precharge: 9  tRAS: 24  

 

 

We need first to set the BIOS to defaults.

Turn off the PSU.

Remove all the RAM.

Use the Clear CMOS Jumper, page #28 MB user manual. this will reset the system configuration.

Install two sticks of RAM, the PC3-12800 (1600MHz) in slot #1 and slot #3

Check that the clear CMOS jumper is back to Keep Data.

Turn on the PSU, power up.

How much memory is now available?

 

 

 


 

 

Hey iammy, I took your advice, and I ended up getting two new 8g of ram (16 total)

 

This time they're the same stick/brand. Also compatible with my board.

 

UNFORTUNATELY... It's now running at 16 gig with 7.95 GB available.


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#6
iammykyl

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That is disappointing.

Did you Clear CMOS?

Please run Speccy again and post the new URL.


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#7
Xeiconfinsha

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✓  Best Answer

Alright, I finally figured out the problem. I was using a corrupt RAM stick, with each new ram I got. Yep, a series of unfortunate luck. When I went to buy new ram, one stick was busted, when I returned it, and bought another, it came with yet another broken/non functioning stick. It took a lot of shopping and returning and the help of a pc tech to solve this. :\

 

Thanks for the help and suggestions guys! Wouldn't have gotten here otherwise.


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#8
iammykyl

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Thanks for the update.

That's very unusual and bad luck to get DOA RAM like that.   Good news you got it sorted, was going to get you to run Memtest86+ as the next step.

 

You are very welcome :thumbsup: 


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