How to contact MSI

Question

This is a community level support forum what means most of us active here (including moderators/admin) are just normal users like you. Although the community will help you with any question if possible there are problems we can't do anything about and you will have to contact MSI (e.g. to help with official technical informations, rma or if you want to complain about a product and all other issues only contact with an MSI official is useful for). If you have been linked to this post other users already realized you need to contact MSI directly.
Global support:
For global support queries you have to register at http://register.msi.com/. After registering and logging in go to "My Support" and "Ask For Support" which allows you to issue your problem.
USA & Canada:
Technical Support - http://service.msicomputer.com/msi_user/support/ts_form.aspx
RMA - http://service.msicomputer.com/msi_user/rma_form_new.aspx
Europe (including UK/Ireland)
RMA for MSI-systems (i.e. notebooks, netbooks, All-In-Ones, nettops, Wind-PCs, full systems) - http://jkarma.msi.com.tw/Customer_Service/
Components, such as for mainboards, VGA cards and multimedia peripheral devices should be returned to the place of purchase. There is no direct RMA to MSI available. The reseller will request RMA.
Support Germany - http://de.msi.com/support-request
Support France - http://frsupport.msi.com/
Where to Buy
http://www.msi.com/service/wheretobuy/
Global Warranty Service for the Notebook
also via http://register.msi.com/
Contacts:
http://www.msi.com/about/contact-us/

Answer 1

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As far as I remember, the original motherboard in the bios setting had PCI-E frequency set to 200, I do not remember if the PCI-E frequency on that board started from 200 or ended at 200?
Sorry, but you must be mistaken.  The defaul PCI Express Frequency is 100 MHz.  Setting it to 200 would most certainly kill your board or the video card.
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I do not find an appreciable performance boost when I take this setting from 100 to 170
Good lord, what are you doing there?  Do not set the PCI Express Frequency to 170 MHz unless you want to blow something up.   
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If I set the PCI-E frequency at 200, the system hangs, there is no video on the monitor
That is normal.  Please clear CMOS with the main A/C power cable removed from your PSU and load "Optimized Defaults" in BIOS Setup.  Under no circumstances should you raise the PCI-E Frequency to 200 MHz.  That's is what you do if you want to actually kill something.
I hope you are lucky and have not blown something to pieces yet.
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Could someone enlighten me on the starting and ending frequencies of PCI-E on the latest motherboards MSI P7N Platinum 750i chipset.
The default PCI-E Frequency is 100 MHz on EVERY Mainboard.  ... and that is also where it should stay. 
Now, please provide full system specifications. Read the >>Posting Guide<<.
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As you can see the replacement is much older.
As I already pointed out in my last post:  This does not really atter.  Check the PCB Version (it is printed onto the PCB, right next to the model Number (MS-7380).  If that it is the same PCB Version, you received exactly the same board model.
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I bought a MSI motherboard P7N Platinum (under 3 years warranty), based computer from the Microport shop, NR Road. I had a problem with this computer
What problem did you originally have?
Did you install the new board you got yourself or did the shop do that for you?