Laptop slower after installing new RAM even though they're both the same frequency 2667 and 2666?

Spleed
Spleed Member Posts: 27 Troubleshooter
Hi I recently bought a new 8GB stick of ram to upgrade my laptop but I'm noticing it's a bit slower now. I tried the windows ram thing and it says there are no problems and both speccy and cpuz show 16gbs. Is there anything I should do after a RAM upgrade? I read some people saying to update BIOS?

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