Question Possible performance drop after RAM upgrade

[bubyy_tomshardware]

So a few days ago I upgraded my 2 sticks of HyperX Fury 4GB 2133MHz DDR4 memory to 2 sticks of Patriot Viper Steel 8GB 3200MHz.
My motherboard supports only up to 2400MHz RAM, but I have read on the internet that faster RAM will just downclock to the mobo maximum and everything will be OK.
I bought the faster RAM so my PC is future-proof because I am hopefully going to upgrade to a Ryzen 5 3600 soon.

I noticed that in Call of Duty MW I am getting lower FPS than I should, around 20-30 less (tested on the same gamemode & map) and sometimes I get FPS drops to around 90 and it looks like it dropped to below 60 (doesn't look smooth). In CS:GO though, I am getting the same FPS as with the old memory. The stutters in PUBG I was having with 8GB RAM though, are now gone.

So I don't really know if my RAM is faulty. Is this happening because of the downclock? Maybe the memory doesn't work as intented when working at a lower speed? Maybe the timings? I have no experience with RAM.
I ran the Windows memory test and it says it hasn't detected any errors. Should I be worried?

I am running an i5 7500 and a GTX 1660 6GB.
XMP is enabled ofcourse.

Thanks in advance!

 

[rgd1101]

full system spec?
what speed is the ram running now? it is dual channel? did the system see all 16gb?

 

[bubyy_tomshardware]

full system spec?
what speed is the ram running now? it is dual channel? did the system see all 16gb?

i5 7500
Gigabyte H110M-S2H
GTX 1660 6GB
SP S55 120GB SSD
Seagate Barracuda 2TB
XFX TS 430W PSU

It is running at 2400MHz (mobo's max). It is dual channel. The system sees all 16gb.

 

[rgd1101]

check cpu/gpu temp? could be something came loose?

 

[bubyy_tomshardware]

check cpu/gpu temp? could be something came loose?

All temps are OK, below 70 C, just like before.

 

[bubyy_tomshardware]

So I did a UserBenchmark benchmark and the new memory is obviously performing better than the old one (79.4% vs 73.8%). How the hell am I experiencing a performance drop then?

 

[bubyy_tomshardware]

So I left memtest86 to do its thing for 3 hours and the new memory has no errors at all. Anyone know what's up??