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Windows 7: 12GB ram only 3.99GB usable
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14 May 2011
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#1 | |
windows 7 professional 64 bit |
12GB ram only 3.99GB usable
i recently installed 2 x 4GB ram chips but my pc doesnt "use" them.
Im running windows 7 64 bit. 
any advise on how to make the ram work? | My System Specs |
| System Manufacturer/Model Number Gigabyte
OS windows 7 professional 64 bit
CPU Intel(R) Core(TM) i7 870@2.93
Motherboard P55-USB3L
Memory 12GB
Graphics Card Gigabyte G-Force GTS 250 1GB
Sound Card onboard
Monitor(s) Displays 19" View Sonic LED
Screen Resolution 1366 x 768
Hard Drives 160GB Seagate primary
1TB Seagate
1TB Seagate
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14 May 2011
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#2 | |
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How does 2x4 = 12? Or do you mean you added an additional 2x4 to your existing 2x2? | | My System Specs | | System Manufacturer/Model Number Self-Built
OS Windows 7 64 bit SP1
CPU Core i7 920
Motherboard Gigabyte GA-X58A-UD3R
Memory 12 GB (6x2GB Corsair)
Graphics Card nVidia 250GTS
Sound Card Built-in
Monitor(s) Displays 2x Samsung SyncMaster 2343 (23" Widescreen)
Keyboard Microsoft Natural Keyboard
Mouse Logitech Laser
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14 May 2011
|
#3 | |
windows 7 professional 64 bit |
yes i had 2 x 2 in and i added the 2 x 4 | | My System Specs | | System Manufacturer/Model Number Gigabyte
OS windows 7 professional 64 bit
CPU Intel(R) Core(TM) i7 870@2.93
Motherboard P55-USB3L
Memory 12GB
Graphics Card Gigabyte G-Force GTS 250 1GB
Sound Card onboard
Monitor(s) Displays 19" View Sonic LED
Screen Resolution 1366 x 768
Hard Drives 160GB Seagate primary
1TB Seagate
1TB Seagate
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14 May 2011
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#4 | |
Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz) SomeWhere in the HOT Arizona Desert ! |
Are they the same brand, type, speed, etc ? a screen snip of CPU-z (memory) would help.
Also systen configuration (Advanced Options) | | My System Specs | | Computer type PC/Desktop
System Manufacturer/Model Number Built them myself, Science Experiments !
OS Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
CPU AMD fx8350 4ghz, AMD-32 2400mhz, AMD-64 3200mhz, AMDx64 2.8G
Motherboard SIS 755, ECS-K8M890M-M (Ult 7600), GigaByte & others
Memory 2gb, 4gb on the Ult 7600, 4gb on Technet RTM, 32gb on FX8350
Graphics Card Draw my own Graphics, several nVidia cards
Sound Card on motherboard
Monitor(s) Displays 19" flat scr, 28" I-Inc widescr,22" Emprex Widescr, 23" Acer
Screen Resolution 1280 x 1024, 1440 x 900, 1920 x 1080
Keyboard Compaq & Dell recycled from GoodWill
Mouse Made in China Optical Wired Mouse
PSU 430w, 550w, 600w, 700, 800, etc
Case All Generic Full Towers
Cooling Open Air & a few fans, some w/ colored LEDs
Hard Drives 6 pata Ide HD's & 2 Sata HD's
added 80gb external on Ult 7600 computer,
numerous extra 1tb, 2TB, 3Tb SATA HD's
A collection of ext HD Docks w/ HDs
Internet Speed Fast Cable InterNet
Antivirus AVG Free on 24 different Desktops, NO Problems!
Browser IE 8 is preferred, but use FireFox sometimes
Other Info Linksys Routers, switches, & Hubs
Too Many USB Flash Drives to count, Biggest is 64GB !
Eight computers in my home network.
Sixteen computers at my business network.
Linked via TeamViewer !
Lots of old used spare computer parts everywhere!
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14 May 2011
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#5 | |
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Try swapping the memory modules so that the 4G's are in the current 2G channels and vice versa. Also, try removing the 2 2GB modules and see if you it gives you 8GB. | | My System Specs | | System Manufacturer/Model Number Self-Built
OS Windows 7 64 bit SP1
CPU Core i7 920
Motherboard Gigabyte GA-X58A-UD3R
Memory 12 GB (6x2GB Corsair)
Graphics Card nVidia 250GTS
Sound Card Built-in
Monitor(s) Displays 2x Samsung SyncMaster 2343 (23" Widescreen)
Keyboard Microsoft Natural Keyboard
Mouse Logitech Laser
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14 May 2011
|
#6 | |
Windows 7 Pro x64 (1), Win7 Pro X64 / WinXP Pro x86 on (2) |
I suspect the new memory may not have matched the existing memory in terms of timings, etc.
How about downloading and installing CPU-Z, run it and then post four screenshots of the four memory slots using the SPD tab.
Also, post a screenshot of the Memory tab.
These should be very helpful in figuring out what's really going on. | | My System Specs | | System Manufacturer/Model Number Home-built, two systems (1) and (2)
OS Windows 7 Pro x64 (1), Win7 Pro X64 / WinXP Pro x86 on (2)
CPU i5-3350p 3.1Ghz/6MB-cache (1); E8400 3.0Ghz/6MB-cache (2)
Motherboard ASUS P8Z77-V Pro (1); ASUS P5Q3 (2)
Memory 8GB PC3-12800 DDR3 (1); 4GB PC3-10600 DDR3 (2)
Graphics Card ATI HD5770 dual-DVI (1), (see TV cards); ATI HD4850 (2)
Sound Card Realtek ALC892 HD Audio (1); Realtek ALC1200 HD Audio (2)
Monitor(s) Displays Eizo HD2441W LCD, Eizo S2433W (1); Eizo 24" S2433W (2)
Screen Resolution 1920x1200, 1920x1200 (1); 1920x1200 (2)
Keyboard IBM PS/2 (1) and (2)
Mouse Logitech MX Revolution wireless (1); Microsoft wired (2)
PSU Nesteq ECS-6001 600W (1); Nesteq ECS-5001 500W (2)
Case Acousti-Case 360 (1) and (2)
Cooling Noctua NH-U12P SE2 for CPU, 2x120mm case fans (1) and (2)
Hard Drives (1) 1TB SATA-II (7200RPM), 2TB SATA-II (7200RPM), 2TB SATA-III (7200RPM), 250GB SATA-III (10000RPM) for OS;
(2) 320GB SATA-II (7200RPM), 750GB SATA-II (7200RPM), 150GB SATA-II (10000RPM) for OS
Internet Speed 15mbps down / 2mbps up
Other Info Ceton InfiniTV 4-tuner cablecard-enabled TV card as well as Hauppauge HVR-2250 OTA/ATSC 2-tuner TV card in (1), running under Win7 WMC
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14 May 2011
|
#7 | |
windows 7 professional 64 bit |
I have tried to run the chips seperate... but it wont start with either of the 4 gb chips on it own
[ATTACH]  [/ATTACH] | | My System Specs | | System Manufacturer/Model Number Gigabyte
OS windows 7 professional 64 bit
CPU Intel(R) Core(TM) i7 870@2.93
Motherboard P55-USB3L
Memory 12GB
Graphics Card Gigabyte G-Force GTS 250 1GB
Sound Card onboard
Monitor(s) Displays 19" View Sonic LED
Screen Resolution 1366 x 768
Hard Drives 160GB Seagate primary
1TB Seagate
1TB Seagate
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14 May 2011
|
#8 | |
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More than likely your memory is not compatible with your motherboard. You could try tweaking the voltage and other settings, but your motherboard likely has very specific requirements for memory. It looks like you have a P55 chipset which means you have to have memory that is designed for 1.5-1.65 volts. Can you post the specs of your new memory, or at least it's make and model number? | | My System Specs | | System Manufacturer/Model Number Self-Built
OS Windows 7 64 bit SP1
CPU Core i7 920
Motherboard Gigabyte GA-X58A-UD3R
Memory 12 GB (6x2GB Corsair)
Graphics Card nVidia 250GTS
Sound Card Built-in
Monitor(s) Displays 2x Samsung SyncMaster 2343 (23" Widescreen)
Keyboard Microsoft Natural Keyboard
Mouse Logitech Laser
|
14 May 2011
|
#9 | |
windows 7 professional 64 bit |
| | My System Specs | | System Manufacturer/Model Number Gigabyte
OS windows 7 professional 64 bit
CPU Intel(R) Core(TM) i7 870@2.93
Motherboard P55-USB3L
Memory 12GB
Graphics Card Gigabyte G-Force GTS 250 1GB
Sound Card onboard
Monitor(s) Displays 19" View Sonic LED
Screen Resolution 1366 x 768
Hard Drives 160GB Seagate primary
1TB Seagate
1TB Seagate
|
14 May 2011
|
#10 | |
Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz) SomeWhere in the HOT Arizona Desert ! |
Thanks for that last CPU-Z snip.
I think you need the 4gb sticks in slots 1 & 3 & the 2gb sticks in slots 2 & 4 
They all look like the same speed but you have 3 diff mfgs of memory. | | My System Specs | | Computer type PC/Desktop
System Manufacturer/Model Number Built them myself, Science Experiments !
OS Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
CPU AMD fx8350 4ghz, AMD-32 2400mhz, AMD-64 3200mhz, AMDx64 2.8G
Motherboard SIS 755, ECS-K8M890M-M (Ult 7600), GigaByte & others
Memory 2gb, 4gb on the Ult 7600, 4gb on Technet RTM, 32gb on FX8350
Graphics Card Draw my own Graphics, several nVidia cards
Sound Card on motherboard
Monitor(s) Displays 19" flat scr, 28" I-Inc widescr,22" Emprex Widescr, 23" Acer
Screen Resolution 1280 x 1024, 1440 x 900, 1920 x 1080
Keyboard Compaq & Dell recycled from GoodWill
Mouse Made in China Optical Wired Mouse
PSU 430w, 550w, 600w, 700, 800, etc
Case All Generic Full Towers
Cooling Open Air & a few fans, some w/ colored LEDs
Hard Drives 6 pata Ide HD's & 2 Sata HD's
added 80gb external on Ult 7600 computer,
numerous extra 1tb, 2TB, 3Tb SATA HD's
A collection of ext HD Docks w/ HDs
Internet Speed Fast Cable InterNet
Antivirus AVG Free on 24 different Desktops, NO Problems!
Browser IE 8 is preferred, but use FireFox sometimes
Other Info Linksys Routers, switches, & Hubs
Too Many USB Flash Drives to count, Biggest is 64GB !
Eight computers in my home network.
Sixteen computers at my business network.
Linked via TeamViewer !
Lots of old used spare computer parts everywhere!
12GB ram only 3.99GB usable problems? All times are GMT -5. The time now is 02:55 AM. |  |
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12GB RAM only 8GB usable 
