Windows 7 64 bit Only Detecting 2gb of ram?

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Jared

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Hello, I'm new here. If this is posted in the wrong section, I apologize.

Today when i booted my computer, it said "windows has detected a decrease in memory" I turned off my computer, unplugged it, took out all 3 sticks of ram, put them back in...

Still, windows is only detecting 2gb of ram when I really have 3gb of ram.
Performance Index for ram went down from 5.9 to 5.5

Can someone tell me what to do so that windows recognized all 3gb of ram.

here's a a couple screen shots:

http://img180.imageshack.us/img180/488/ss1z.png
http://img88.imageshack.us/img88/8462/ss2hd.png

Thanks!!
 

My Computer My Computer

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Window 7intel core i7 920 @ 3.8GHz over clockedocz 3gb DDR3Radeon 4870 HD
Computer Manufacturer/Model Number
Custom
OS
Window 7
CPU
intel core i7 920 @ 3.8GHz over clocked
Motherboard
Intel DX5850 Extreme
Memory
ocz 3gb DDR3
Graphics Card(s)
Radeon 4870 HD
Monitor(s) Displays
LG W2453V, Dell
Hard Drives
1.2TB 2x 640GB SATA-II, 7,200 RPM, 16MB Cache
Case
Antec Skeleton
Cooling
Zalman cpu fan
It is giving this behavior, because likely, one of your memory sticks, or one of your memory slots has died. Swap them around to find out which it is, and then you can go about replacing that part. Hopefully, it will be one of the sticks, as that would be much simpler than replacing the mobo.
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64 SP1Intel Core i7-260012 GB Patriot Extreme DDR3-1333Nvidia GTX 470
OS
Windows 7 Ultimate x64 SP1
CPU
Intel Core i7-2600
Motherboard
Gigabyte GA-P67A-UD3P-B3
Memory
12 GB Patriot Extreme DDR3-1333
Graphics Card(s)
Nvidia GTX 470
Monitor(s) Displays
Dell UltraSharp 2209WA
Hard Drives
OCZ Agility3 240 GB, WD5001AALS, WD7501AALS
PSU
OCZ ModStream 700W
Case
CoolerMaster HAF 912 Advanced
Cooling
CoolerMaster Hyper 212 Plus
how many sticks of ram? one could have gone bad which can happen. to test this try booting with each stick. if one fails post (boot up test), then its bad. :)

you can also check the bios to see how much ram it sees. if it also sees 2gb, then im right. no sticks are bad, then reseat all the ram sticks.
 

My Computer My Computer

At a glance

Windows 7 Enterprise x64 SP1Intel Core i3-2100 @ 3.10GHz10 GB DDR3Asus EAH5450 series (Radeon)
Computer Manufacturer/Model Number
ATX Custom Build 2012
OS
Windows 7 Enterprise x64 SP1
CPU
Intel Core i3-2100 @ 3.10GHz
Motherboard
Intel DH67CL desktop ATX
Memory
10 GB DDR3
Graphics Card(s)
Asus EAH5450 series (Radeon)
Monitor(s) Displays
Samsung SyncMaster 226BW, Samsung Syncmaster P2450H
Screen Resolution
226BW: 1680 x 1050 & P2450H: 1920 x 1080
Hard Drives
Western Digital 320 GB sata (boot), Samsung 640 GB sata, Seagate 2 TB sata (data)
PSU
Cooler Master Extreme Power Plus 500W
Case
Thermaltake V3 Black Edition
Cooling
stock cooling with added intake fan
Keyboard
HP Wireless Elite Keyboard Wireless Keyboard
Mouse
Microsoft Touch
Internet Speed
Comcast Cable business class <=18Mb {averages 12Mb}
Other Info
Optical drives: LG SuperMulti Blue, HP DVD 1260T
Other: Kensington Bluetooth Receiver
Network: Buffalo Wireless N USB, DLink N router/DLink Ethernet Switch/DLink Xtreme N wireless bridge
Printer: HP Photosmart Plus, HP Officejet Pro 8600 Plus
PCs: HP dv6-3040us (7 x64 SP1), HP DM4-2165dx (7 x64 SP1), HP Pavilion zv6130us (7 x86), Apple Macbook Air (Lion)
************
Jared said:
Hello, I'm new here. If this is posted in the wrong section, I apologize.

Today when i booted my computer, it said "windows has detected a decrease in memory" I turned off my computer, unplugged it, took out all 3 sticks of ram, put them back in...

Still, windows is only detecting 2gb of ram when I really have 3gb of ram.
Performance Index for ram went down from 5.9 to 5.5

Can someone tell me what to do so that windows recognized all 3gb of ram.

here's a a couple screen shots:

http://img180.imageshack.us/img180/488/ss1z.png
http://img88.imageshack.us/img88/8462/ss2hd.png

Thanks!!
Click to expand...
Welcome to Windows 7 Support.
I see that Deacon and Merkat have already given you good suggestions, I'll throw in with my 2 cents and add that since you have a custom rig check out your bios settings. We don't know whats changed in your case did you you just complete the install to Windows 7 or did you have updates and so on.
 

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Windows 7 7600 1 X64AMD PHENOM II X 550 PROCESSOR 3.1 ghzCorsair 4 gig ddr 3ati radeon 3300
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 7600 1 X64
CPU
AMD PHENOM II X 550 PROCESSOR 3.1 ghz
Motherboard
ASUS M4A78-TE
Memory
Corsair 4 gig ddr 3
Graphics Card(s)
ati radeon 3300
Sound Card
ati hd
Monitor(s) Displays
syncmaster 2033sw
Screen Resolution
1600X900 60 hz refresh
Hard Drives
twin_seagates SATA's 1 TB & 500 Gig, hitachi_slimline 160 gig
PSU
antec_550 watt
Case
cooler master GLite
Cooling
stock_heat sink
Internet Speed
20mbs up/ 1.5mbs down
Other Info
favorite child "stewie"
favorite dog "brian"
well that's really strange...

after spending 10 minutes swapping the memory around, is appears that windows is now detecting all 3gb of ram...

problem solved i guess?

thanks for the help everyone!
 

My Computer My Computer

At a glance

Window 7intel core i7 920 @ 3.8GHz over clockedocz 3gb DDR3Radeon 4870 HD
Computer Manufacturer/Model Number
Custom
OS
Window 7
CPU
intel core i7 920 @ 3.8GHz over clocked
Motherboard
Intel DX5850 Extreme
Memory
ocz 3gb DDR3
Graphics Card(s)
Radeon 4870 HD
Monitor(s) Displays
LG W2453V, Dell
Hard Drives
1.2TB 2x 640GB SATA-II, 7,200 RPM, 16MB Cache
Case
Antec Skeleton
Cooling
Zalman cpu fan
I agree try starting your pc with just 1 stick of ram in it at a time
 

My Computer My Computer

At a glance

windows 7AMD Phenom II X4 9658 gigs GskillGTX470
Computer Manufacturer/Model Number
custom
OS
windows 7
CPU
AMD Phenom II X4 965
Motherboard
M4N98TD EVO
Memory
8 gigs Gskill
Graphics Card(s)
GTX470
Sound Card
sound blaster
Monitor(s) Displays
2x hpw1907
Hard Drives
2X WD750
PSU
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Case
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g11
Mouse
logitech G7
Jared said:
well that's really strange...

after spending 10 minutes swapping the memory around, is appears that windows is now detecting all 3gb of ram...

problem solved i guess?

thanks for the help everyone!
Click to expand...

Glad to hear :)

I guess the all ram wasn't seated correctly on the motherboard
 

My Computer My Computer

At a glance

Windows 7 Enterprise x64 SP1Intel Core i3-2100 @ 3.10GHz10 GB DDR3Asus EAH5450 series (Radeon)
Computer Manufacturer/Model Number
ATX Custom Build 2012
OS
Windows 7 Enterprise x64 SP1
CPU
Intel Core i3-2100 @ 3.10GHz
Motherboard
Intel DH67CL desktop ATX
Memory
10 GB DDR3
Graphics Card(s)
Asus EAH5450 series (Radeon)
Monitor(s) Displays
Samsung SyncMaster 226BW, Samsung Syncmaster P2450H
Screen Resolution
226BW: 1680 x 1050 & P2450H: 1920 x 1080
Hard Drives
Western Digital 320 GB sata (boot), Samsung 640 GB sata, Seagate 2 TB sata (data)
PSU
Cooler Master Extreme Power Plus 500W
Case
Thermaltake V3 Black Edition
Cooling
stock cooling with added intake fan
Keyboard
HP Wireless Elite Keyboard Wireless Keyboard
Mouse
Microsoft Touch
Internet Speed
Comcast Cable business class <=18Mb {averages 12Mb}
Other Info
Optical drives: LG SuperMulti Blue, HP DVD 1260T
Other: Kensington Bluetooth Receiver
Network: Buffalo Wireless N USB, DLink N router/DLink Ethernet Switch/DLink Xtreme N wireless bridge
Printer: HP Photosmart Plus, HP Officejet Pro 8600 Plus
PCs: HP dv6-3040us (7 x64 SP1), HP DM4-2165dx (7 x64 SP1), HP Pavilion zv6130us (7 x86), Apple Macbook Air (Lion)
************
Suggest you run Memtest86 to see if you get any errors:

Memtest86

A Guy
 

My Computer My Computer

At a glance

Windows 10 Home x64INTEL Core i5-750 Quad-Core 3.37GHzHyperX Fury Black Series 8GB (2 x 4GB) 1866MhzEVGA GeForce GTX 750 Superclocked 1GB 128-Bit...
Computer type
PC/Desktop
OS
Windows 10 Home x64
CPU
INTEL Core i5-750 Quad-Core 3.37GHz
Motherboard
ASUS P7P55D
Memory
HyperX Fury Black Series 8GB (2 x 4GB) 1866Mhz
Graphics Card(s)
EVGA GeForce GTX 750 Superclocked 1GB 128-Bit GDDR5
Monitor(s) Displays
LG 32MA68HY 32" IPS
Screen Resolution
1920 x 1080
Hard Drives
Samsung 840 Evo 120GB, SEAGATE 500GB Barracuda® 7200.12, SATA 3 Gb/s, 7200 RPM, 16MB cache
PSU
ANTEC TruePower New TP-550, 80 PLUS, 550W
Case
ANTEC Three Hundred Illusion
Cooling
COOLER MASTER Hyper 212 Plus, 4 x 120mm 1 x 140mm Noctua's
Internet Speed
85 + Mbps
Antivirus
Avast
Browser
Vivaldi
Yep, I'd still want to run Memtest just to make sure the memory tested out okay, but it does sound like one of the sticks just wasn't seated properly.
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64 SP1Intel Core i7-260012 GB Patriot Extreme DDR3-1333Nvidia GTX 470
OS
Windows 7 Ultimate x64 SP1
CPU
Intel Core i7-2600
Motherboard
Gigabyte GA-P67A-UD3P-B3
Memory
12 GB Patriot Extreme DDR3-1333
Graphics Card(s)
Nvidia GTX 470
Monitor(s) Displays
Dell UltraSharp 2209WA
Hard Drives
OCZ Agility3 240 GB, WD5001AALS, WD7501AALS
PSU
OCZ ModStream 700W
Case
CoolerMaster HAF 912 Advanced
Cooling
CoolerMaster Hyper 212 Plus
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