Question RAM upgrade performance issues

Jun 16, 2020
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Upgraded RAM from 8 to 16GB. With 8GB, on a particular game, I got medium FPS with very low latency but very large low FPS spikes. With the new RAM, the spikes have gone but I only get 20 FPS on average now, with a very high latency of 100+ ms. The RAM sticks are the same make as the old ones and are running at well over 2500 Hz. How can I fix this ?
 
Jun 16, 2020
3
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10
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full system spec? include make and model of the psu
processor - Intel(R)Core(TM i5-6400 CPU @2.70GHz
Installed RAM - 16GB
GPU - NVIDIA GeForce GTX 950 (but a 1660 super is coming in a few days)
MotherBoard - Gigabyte B150M-DS3H-CF
PSU - aerocool ACP-1500HG
 

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