Hello, I'm Jewel with Kingston Technical Support and would like to offer our assistance. On most desktop motherboards the matched or paired slots will be the same color and every other slot, like 1/3 and 2/4. This is not true for 100% of configurations and it is best to check your motherboard manual for the recommended memory configurations. For further assistance, please call us at 1-800-435-0640 (USA and Canada only) M - F 6am - 6pm PT and I or another available Technician will assist you.
Thank you for selecting Kingston as your upgrade partner.