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NEW RAM CAUSES SLOW OPERATION IN WINDOWS 7 x64

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November 25, 2010 2:11:36 PM

I have an MSI SLI Platinum Series MS-7350 Motherboard that I am upgrading the RAM in.

The original RAM setup was:
2X 512MB stick DDR2 667

The new RAM setup is:
2X 2GB stick DDR2 800 (please see http://www.newegg.com/Product/Product.aspx?Item=N82E168... )

When both 2GB sticks are present, Windows 7 x64 runs doggedly slow. Startup and shutdown each take about 10 minutes, and browsing the Windows 7 GUI is almost impossible due to unresponsiveness. This is true when the sticks are running in dual-channel mode and when they are running in single-channel mode.
When 1 stick is present, the system is runs as expected. This is true when either stick is used alone.
With both sticks installed, BIOS sees RAM and runs it at full speed. It only starts to act up near the end of the windows boot.
Memtest86 has been little help. I started it about an hour ago and it has given me absolutely no feedback. It's stuck at
"Test 8%
Test #0 [Address test, walking ones, no cache]"
I've never used Memtest86 before, so I'm not sure what this means or how long I should wait.

Thank you, techies, for giving your help to the community!
I could never repay you all for the information you share! What a treasure!

Please let me know what additional information you need from me.

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a c 346 } Memory
a b $ Windows 7
November 25, 2010 2:47:37 PM
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My initial thought is incompatible RAM with your MOBO, and so you have some options: 1. Start a Ticket with A-DATA to confirm or suggest 'compatible' RAM, 2. RMA to newegg as listed below.

Unfortunately, A-DATA doesn't list your MOBO {P6N SLI Platinum / MS-7350} so I cannot rule-out a reasonable explanation.

I assume that you properly installed the RAM in the correct slots:
CPU | DIMM 1 | DIMM 3 | DIMM 2 | DIMM 4 |
DIMM 1 & DIMM 2 <or> DIMM 3 & DIMM 4

ref:
P6N SLI Platinum - http://www.msi.com/index.php?func=proddesc&maincat_no=1...
Crucial - http://www.crucial.com/store/listparts.aspx?model=MS-73...(P6N%20SLI%20Platinum)
QVL - Kingston 4GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Desktop Memory Model KVR800D2N6/4G http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Corsair Tested - http://www.corsair.com/configurator/product_results.asp...
CORSAIR XMS2 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model TWIN2X4096-6400C5DHX http://www.newegg.com/Product/Product.aspx?Item=N82E168...
November 25, 2010 4:31:34 PM

Jaquith, thank you for your excellent response. You have provided me with resources that I never knew existed.
I did install the RAM into the correct slots as you suggested.

I have decided to run my RAM slots as follows:
DIMM 1: 512MB DDR2 667
DIMM 2: 512MB DDR2 667
DIMM 3: 2GB DDR2 800
DIMM 4: Empty

CPU | 512MB | 2GB | 512MB | EMPTY

This setup seems to work great in Windows. I am aware that all RAM with operate at DDR2 667 speed in this configuration.

I am keeping the other 2GB stick with my other components for use as a test stick.

Any additional thoughts, recommendations, or considerations are appreciated!
Related resources
a c 346 } Memory
a b $ Windows 7
November 25, 2010 6:35:43 PM

You have a 'Dual' Channel MOBO and the RAM 'should be' in stalled ONLY in pairs. In addition, the RAM 'should have' the EXACT same Speed, CAS, Voltage, and Type {which includes compatibility and chips/side}. Unfortunately, you have none of this, so I'm surprised you don't have more problems. --- Your 'breaking a Dual Channel and incorrectly installing the RAM in the incorrect DIMM slots; I encourage you to review the Manual {see page 21}.

CPU | 512 | 2GB | 512 | 2GB |

Therefore, my advice is to return the '2GB' for either a 2X2GB or 2X1GB 'matched' set from the information I posted earlier.

Good Luck! :) 
January 2, 2011 11:33:37 PM

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