F4-3600c16d-16gtzr

[m1sterio]

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[GSKILL TECH]

Test one module at a time to see if one performs differently. You mentioned one works better, did you try the other? Does the memory perform at XMP Profile values? What motherboard and CPU do you have?

Should replacement be necessary, submit the RMA request form online:

https://www.gskill.com/rma-policy

[GSKILL TECH]

Either module installed works well?