He absolutely had me this type of memory upgrade for an "old" laptop to relatives, it presented no particular concern and these bars have been recognized and running smoothly after several weeks of use. I have rarely been disappointed by Komputerbay, fortunately the 5-star service (with free return + reimbursement if any) is provided during the first months by Amazon if problems (this is a prerequisite as part of purchase of high tech product for me). Recommended!