Need Help with Upgradation of Ram and Motherboard

[akashdeep20nov]

So I downloaded Speccy to see how much Memory can my motherboard hold, I am planning to buy a 4GB Ram, I already have 2 GB, which will make it 6GB. After Analysis :

Memory
Type DDR3
Size 2048 MBytes
Channels # Single
CAS# Latency (CL) 7 clocks
RAS# to CAS# Delay (tRCD) 7 clocks
RAS# Precharge (tRP) 7 clocks
Cycle Time (tRAS) 20 clocks
Bank Cycle Time (tRC) 27 clocks
Command Rate (CR) 1T

Physical Memory
Memory Usage 94 %
Total Physical 2.00 GB
Available Physical 107 MB
Total Virtual 4.00 GB
Available Virtual 1.69 GB <---------- IS THIS SUPPOSED TO MEAN I CAN USE
ONLY ONE MORE 2GB RAM?

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IF NO,
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THIS IS THE SUMMARY OF MY PC

Operating System
Windows 7 Ultimate 64-bit
CPU
AMD Sempron 145 41 °C
Sargas 45nm Technology
RAM
2.00GB Single-Channel DDR3 (7-7-7-20)
Motherboard
BIOSTAR Group N68S3B (CPU 1) 39 °C
Graphics
W1941 (1360x768@60Hz)
2047MB NVIDIA GeForce GT 710 (ZOTAC International) 47 °C
Storage
298GB Western Digital WDC WD32 00AAJS-00L7A SCSI Disk Device (SATA) 43 °C
Optical Drives
UDWTKPY Y3SLAROPI SCSI CdRom Device
HL-DT-ST DVD-RAM GH22NP20 ATA Device
Audio
High Definition Audio Device
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*Also I have 3GB Graphics Card.

 

[rgd1101]

that the virtual memory(aka hard disk cache)

 

[algorithmbreaker]

Total Physical 2GB = RAM out of which 107MB is available for your use.
Total Virtual 4GB = This is Virtual RAM allocated out of your hard disk. 1.69GB available.

For your system, minimum RAM upgrade is to add a 4GB stick
My recommendation is to go for 2x4GB the maximum RAM.

Check below link for RAM upgrade specs of Biostar N68S3B motherboard:

http://www.memorystock.com/memory/BiostarN68S3BVer6xMainboard.html