I know 2 will work but I do not know about 1 - it might be dependent on the MoBo
GrimJack
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Hello,
You'd be better off checking the motherboard spec.
Post your spec here if you want us to check. some motherboards will require memory modules to be set up in pairs.
Post the spec of your ram aswell.
Xlphos
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If the RAM is different, they will both/all run at the speed of the slowest card.
crunchie
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