managed to win another 6GB Patriot Viper to go with my existing Patriot Viper to give me 12GB. Problem is one of the new (used) sticks isn't working. Tried it on its own and PC wont boot. Could it be something obvious that might bring it back or is it gone completely meaning I have to now arrange a return? 
Please note: I have tried everything to do with making it work whist in the PC. Nothing.

Please note: I have tried everything to do with making it work whist in the PC. Nothing.
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