Upgrading Memory

[ElwynEvans]

Hello All,

I tried searching for this in this thread but no hits.

I have a Compaq Presario SR1519uk Desktop PC.  I was having a number of issues with BSoDs occuring shortly after bootup and this has been going for a while, but I have isolated this issue to be caused by defective old RAM.

I have bought some new Ram which matches: DDR400 PC 3200 1GBx2 to replace my old and faulty 512x2 so I am now running 4GB in total.  I have also upgraded my OS to Windows 7 Home premium 64bit.

CMOS is showing all slots with 1GB yet Windows 7 states 4GB installed with only 3GB usable.

According to the Product site: http://support.hp.com/us-en/document/c00433467  It does accept 4GB though it also states actual available memory may be less?

I recall reading on a forum somewhere (cant find it for the life of me ) that you can change a setting in CMOS and it will see and allow you to access all of the RAM but cant find the article or figure it out... Any ideas?

Some more info that I just pulled off CPUID:

Memory SPD
-------------------------------------------------------------------------

DIMM #                1
    SMBus address        0x50
    Memory type        DDR
    Manufacturer (ID)    Corsair (7F7F9E0000000000)
    Size            1024 MBytes
    Max bandwidth        PC3200 (200 MHz)
    Part number        VS1GB400C3        
    Number of banks        2
    Data width        64 bits
    Correction        None
    Registered        no
    Buffered        no
    Nominal Voltage        2.50 Volts
    EPP            no
    XMP            no
JEDEC timings table        CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC #1        2.5-3-3-7-n.a. @ 166 MHz
    JEDEC #2        3.0-4-4-8-n.a. @ 200 MHz

DIMM #                2
    SMBus address        0x51
    Memory type        DDR
    Manufacturer (ID)    Corsair (7F7F9E0000000000)
    Size            1024 MBytes
    Max bandwidth        PC3200 (200 MHz)
    Part number        VS1GB400C3        
    Number of banks        2
    Data width        64 bits
    Correction        None
    Registered        no
    Buffered        no
    Nominal Voltage        2.50 Volts
    EPP            no
    XMP            no
JEDEC timings table        CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC #1        2.5-3-3-7-n.a. @ 166 MHz
    JEDEC #2        3.0-4-4-8-n.a. @ 200 MHz

DIMM #                3
    SMBus address        0x52
    Memory type        DDR
    Manufacturer (ID)    Micron Technology (2C00000000000000)
    Size            1024 MBytes
    Max bandwidth        PC3200 (200 MHz)
    Part number        16VDDT12864AY40BD3
    Serial number        DA1B7E3F
    Manufacturing date    Week 70/Year 07
    Number of banks        2
    Data width        64 bits
    Correction        None
    Registered        no
    Buffered        no
    Nominal Voltage        2.50 Volts
    EPP            no
    XMP            no
JEDEC timings table        CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC #1        2.0-2-2-6-n.a. @ 133 MHz
    JEDEC #2        2.5-3-3-7-n.a. @ 166 MHz
    JEDEC #3        3.0-3-3-8-n.a. @ 200 MHz

DIMM #                4
    SMBus address        0x53
    Memory type        DDR
    Manufacturer (ID)    Micron Technology (2C00000000000000)
    Size            1024 MBytes
    Max bandwidth        PC3200 (200 MHz)
    Part number        16VDDT12864AY40BD3
    Serial number        DA1B7E56
    Manufacturing date    Week 70/Year 07
    Number of banks        2
    Data width        64 bits
    Correction        None
    Registered        no
    Buffered        no
    Nominal Voltage        2.50 Volts
    EPP            no
    XMP            no
JEDEC timings table        CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC #1        2.0-2-2-6-n.a. @ 133 MHz
    JEDEC #2        2.5-3-3-7-n.a. @ 166 MHz
    JEDEC #3        3.0-3-3-8-n.a. @ 200 MHz

Strange thing is the new Ram Modules I just purchased (the Corsair) are 400 MHz but thats not showing.  Have I loaded them in the wrong slots.. i.e. 1&3 and 2&4, and which modules should go where if that is the case?

[mallthus]

@blackcloudsrule: Yes. Clicked in without issue.

In talking to the previous owner of the system, who'd been running it with 6GB of RAM (the 2x2GB he gave me and 2x1GB he sold), I'm pretty sure it's not the slots.

My guess is that, now that I'm spending more time looking into this, the OZ RAM he gave me is 5-5-5-12 and the RAM I bought is 4-4-4-15.

I think that, absent some words of clarity from the board here, I'm going to sell on the discontinued OCZ sticks and order up two more matching Kingston sticks.

[blackcloudsrule]

The memory timing shouldn't be important as your motherboard should just go with the timings of the lowest one.  About the only thing that can cause memory unsuitability is a different ddr typre such as ddr2 and ddr3.

[mallthus]

---

@blackcloudsrule wrote:

The memory timing shouldn't be important as your motherboard should just go with the timings of the lowest one.  About the only thing that can cause memory unsuitability is a different ddr typre such as ddr2 and ddr3.

---

That's what I thought too. Of course, the reality is that no matter which way I try to install this memory it works with 2 DIMMS installed (either set, either set of slots) and doesn't with 4. So frustrating. I haven't tackled the CMOS option (I'm not a huge fan of playing with fire), but I guess it's worth a try before I give up entirely.

[blackcloudsrule]

For some reason, I couldn't get the kingston ram to be recognized and i think it was because it was a smaller physical height to the samsung ram installed. Windows told me after a reboot that I had installed hardware that was not compatible, even though the memory was ddr 3 1333, the same as the samsung.

What worked for me was going back to the store and exchanging the kingston for Corsair. It was the same physical height of the samsung modules and upon reboot, accepted it without any worries.

[rgchak]

I have a Pavilion Media Center m7567c running Win 7 Professional with 4x1GB 533MHz memory cards. My question is can I upgrade to 2x2GB 667MHz cards or must I use 4x1GB 667MHz cards? This is my first time on the forum and Thanks for any help.

[blackcloudsrule]

This will aid you when upgrading buddy.

PC2-4200 ram and limited to 4 x 1GB modules

Below will contain a-lot of information about your system.

http://www.premiumgeeks.com/desktop/hp/hp-pavilion-media-center-m7567c-specs/

JOE333 - You won't be risking your hard drive by upgrading your memory. If it doesn't work, take it out and your system should return to normal as long as you still have the old memory in it. Consider wearing a antistatic wristband to avoid any static electricity zaps or just touch the case as you are working on it and stay off the carpet 😉

[mallthus]

Don't worry about JOE33...it's a spam troll. Multiple posts, multiple topics, all pointing to the same website.

[m400yUser]

I have searched this thread, but found no information that would help me with upgrading memory on an HP m400y media center PC.

I want to run Windows 7 with the most memory my machine will allow. I am currently running Windows XP SP2 with 512MD installed in slot 0, and slot 1 is vacant.

Here is my dilemma: there is an inconsistency between the HP product description, motherboard maximum memory and what memory sellers say is the maximum memory. The motherboard is an ASUStek P4SD-LA Oxford (HP calls it U6LE)

HP product description: 1 GB maximum via 2 512MB PC3200 DDR in each slot

Board specification from HP site: 2 GB maximum (but PC mfr may recommend less memory)

ASUStek P4SD-LA manual: 2 GB maximum, 1 GB in each slot

Memory sellers: 2 GB maximum, 1 GB PC3200 DDR in each slot

So, which is correct? The only thing I can think of is the BIOS is limiting the addressable memory. The BIOS is not AMI, when I checked, although it says AMI v3.24 - AMI says that it is a NEC BIOS and HP cannot remove the AMI v3.24 BIOS note in the boot up screen.

Can someone explain if I can actually use the 2 GB without (1) damaging the motherboard and (2) will the machine see all the memory above 1 GB if it boots up?

Regards,

Jack J. Ference

m400User

[blackcloudsrule]

You can't damage your motherboard by inserting the wrong memory. You will simply recieve a message stating the module is not compatible. Try purchasing from a trustworthy computer shop who will allow you to take the memory back if it's not compatible. Mine allowed me to return a power supply that wouldn't fit well.