Most machines will tell what board you have on the boot up screen. You just have to read quickly. Also do you have a Dell or HP or something, checking their web site for your machine name should tell you. Failing that, open the box and search the motherboard for a company name (i.e. ASUS, MSI, ECS (EliteGroup), etc...)
Go to the companies website and they'll tell you how to determine exactly what board you have, and what revision it is.
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Remember Dieppe
