PC with 2 RAMs of different frequencies (1GB 533MHz + 2GB 667MHz) showing only 2GB RAM

Posted by srinivas on Super User See other posts from Super User or by srinivas
Published on 2012-04-10T16:55:47Z Indexed on 2012/04/10 17:33 UTC
Read the original article Hit count: 269

Filed under:

memory

|

ddr2

I have 6 years old PC with 1.25GB (1GB + 256MB) of DDR2 533MHz RAM. As computer has become very slow and memory usage reaching its limits most of the times, i decided to upgrade RAM. But unfortunately, im not finding retailers selling DDR2 533Mhz RAM near my area.

Since I was not sure mixing up RAMs of different frequencies, i searched in web. Most results said they can be mixed but computer would run at lower frequency of the 2 RAMs. So I bought 2GB DDR2 667Mhz RAM expecting my pc to have 3GB RAM running at 533 MHz.

But computer properties page shows only 2GB RAM. BIOS settings too show the slot with 2GB 667MHz as ACTIVE and other slot with 1GB 533MHz as "NOT INSTALLED". When I removed 2GB RAM, they computer shows only 1GB RAM. So for some reason, 1GB RAM is not getting detected/used.

What is the problem here?

thanks in advance.

© Super User or respective owner

Related posts about memory

SQL Server and Hyper-V Dynamic Memory Part 2

as seen on SQL Blog - Search for 'SQL Blog'
Part 1 of this series was an introduction and overview of Hyper-V Dynamic Memory. This part looks at SQL Server memory management and how the SQL engine responds to changing OS memory conditions. Part 2: SQL Server Memory Management As with any Windows process, sqlserver.exe has a virtual… >>> More
SQL Server and Hyper-V Dynamic Memory - Part 1

as seen on SQL Blog - Search for 'SQL Blog'
SQL and Dynamic Memory Blog Post Series Hyper-V Dynamic Memory is a new feature in Windows Server 2008 R2 SP1 that allows the memory assigned to guest virtual machines to vary according to demand. Using this feature with SQL Server is supported, but how well does it work in… >>> More
SQL Server and Hyper-V Dynamic Memory - Part 1

as seen on SQL Blog - Search for 'SQL Blog'
SQL and Dynamic Memory Blog Post Series Hyper-V Dynamic Memory is a new feature in Windows Server 2008 R2 SP1 that allows the memory assigned to guest virtual machines to vary according to demand. Using this feature with SQL Server is supported, but how well does it work in… >>> More
Python Memory leak - Solved, but still puzzled

as seen on Stack Overflow - Search for 'Stack Overflow'
Dear everyone, I have successfully debugged my own memory leak problems. However, I have noticed some very strange occurence. for fid, fv in freqDic.iteritems(): outf.write(fid+"\t") #ID for i, term in enumerate(domain): #Vector tfidf = self.tf(term… >>> More
SQL Server and Hyper-V Dynamic Memory Part 3

as seen on SQL Blog - Search for 'SQL Blog'
In parts 1 and 2 of this series we looked at the basics of Hyper-V Dynamic Memory and SQL Server memory management. In this part Serdar looks at configuration guidelines for SQL Server memory management. Part 3: Configuration Guidelines for Hyper-V Dynamic Memory and SQL Server Now that… >>> More

Related posts about ddr2

4 GB DDR2 vs 2 GB DDR 3...........

as seen on Super User - Search for 'Super User'
I 'm going to purchase new PC. due to my budget limit either i can purchase 2 x 2GB = 4GB DDR 2 or 2 GB Single stick DDR 3. Will 2 GB DDR 3 will give almost same performane compare to 4 GB DDR 2? In future I will upgrade RAM upto 8 GB Which option would be better for me for now and why? >>> More
Difference between DDR1 and DDR2?

as seen on Server Fault - Search for 'Server Fault'
What is the difference? I just purchased a dedicated server (Dell 2.4GHz Intel Xeon - 4GB Ram - 74GB SCSI 10k RPM) with DDR1 but I was looking for DDR2, will I see a difference? >>> More
Using ddr2 and ddr3 together

as seen on Super User - Search for 'Super User'
I have a Gigabyte board called GA-EP45C-DS3. It has four DDR2 slots, and 2 DDR3 slots. I would like to use them in parallel, and achieve the result of 12gb RAM. Will it work? see: http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2870 >>> More
Using ddr2 and ddr3 together

as seen on Server Fault - Search for 'Server Fault'
I have a Gigabyte board called GA-EP45C-DS3. It has four DDR2 slots, and 2 DDR3 slots. I would like to use them in parallel, and achieve the result of 12gb RAM. Will it work? see: http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2870 >>> More
Need to upgrade DDR2 RAM on HP Desktop

as seen on Super User - Search for 'Super User'
I have this HP Pavilion Desktop. As you can see, that page says the memory speed supported is PC2-4200. It currently has a 512 MB stick - CPU-Z Screenshots: hxxp://i41.tinypic.com/j5clj6.jpg and hxxp://i39.tinypic.com/20tldlc.jpg However, a crucial.com scan gives a slightly different report - hxxp://crucial… >>> More