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 ?