Question about Evga (133-P4-NF51-AX) Motherboard

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CPU goes to 100 % usuage with more then 2 gigs memory installed

I have an EVGA nForce 4 motherboard , 133-P4-NF51-AX, Smithfield P4 840 dual core cpu , and 4 gigs of matched Kingston memory. When I install 2 gigs memory , cpu runs normal , but when 3 or 4 gigs are installed it goes to 100% usuage and lags out badly . My operating system is Win XP Pro X64 edition.
I have talked with Kingston support and EVGA support and have gotten nowhere .
Can anyone help with this problem?

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Firstly make sure that your BIOS doesn't have a configuration/setting for larger RAM installed and doesn't have any RAM paging configurations that need setting.
If Kingston tech support couldn't solve this, we can presume that the memory sticks and the motherboard memory addressing is good. To solve this you need to look for an application post-startup that is hijacking your CPU. It's then likely that you have an older application that when it addresses more than 2 gigs gets thrown into an endless loop and hogs your system. The following will identify and help you eliminate that application.
With your 2 gigs installed, do the following.
Click Start>Run and type in "msconfig". This runs the configuration utility that shows your startup programs and services. Select the "Diagnostic Startp" option , then click "Apply" and follow the restart instructions. When your system reboots select "cancel" when asked to restore the settings. This will keep these settings through the next steps. Make sure that your system works well in this diagnostic mode with the 2 Gigs. All those burdensome background running applications that sap your system resources will be eliminated (temporarily) and bare Windows can run unencumbered without being dragged down. Shut down your system.

Install the remaining 2 gigs. Reboot and see if the system still maxes out at 100% (make sure you leave it for a while to give it a chance to settle down).
Try your issue again. If this time it operates as normal without the system being maxxed out, you'll know that at least one of those startup applications is the culprit. Running msconfig again will allow you to restore the Normal Startup, and the Startup tab will allow you to remove selectively that application that is causing the issue.  

One way to identify which one is the culprit is to restart normally (select the Normal Start option in msconfig and reboot) and once back up, do a ctrl-alt-del to bring up the Task Manager. Click the "Processes" tab and then click the heading "Mem Usage". This will sort running processes by how much memory resources they consume.  The memory hogs may not be the one giving you the problem, but it's likely that a heavy memory/resources consumer is also sapping the CPU cycles needed to operate normally. Make a note of the top heavy memory users (print a screenshot) and use this list to eliminate any that are also on the startup list back in msconfig.  

Don't use the "End Process" button in the Task Manager to simply stop them, as you'll likely stop one that is critical to Windows functionality. Msconfig's Startup list just shows the ones that get started at Windows boot up and can be eliminated without crippling Windows - much safer.  

Use your memory hog list to start eliminating, one at a time, the offending applications from the startup list until the issues is resolved. Its a little tedious, but helps clean up your system in the process.  

Hope this helps, and please rate my answer.

Posted on Dec 31, 2008

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bult_ar_org.gifHyper Transport Bus

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bult_ar_org.gifChipset
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space_silver.gif

bult_ar_org.gifMain Memory


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space_silver.gif

bult_ar_org.gifSlots

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bult_ar_org.gifOn-Board IDE


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bult_ar_org.gifOn-Board SATA

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How to identify Japanese Electrolytic Capacitors,
http://www.hardwaresecrets.com/article/595
[Hardwaresecrets.com]
Page 2 and 3 get more to the direct matter of reading the markings for Japanese Electrolytic Capacitors. Page 4 deals with Chinese and Taiwanese Electrolytic Capacitors.

Also want to include this,
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