Amd a10 6800k with Nvidia 1050 ti Gaming X

Hi guys

So i have a problem with my pc,Before I had a AMD A10-6800K 4.1GHz with a MSI HD7850 OC 2GB, now i upgraded my gpu to a Nvidia 1050 ti Gaming X, and the problem is that i dont get a solid run on every single game. The games seems to have lag, seems no running good, can you guys help?

Thanks

Motherboard Asus F2A85-M LE (90-MIBJE0-G0EAY0DZ) Gskill Ripjaws X DDR3-1600MHz 3x4GB (F3-12800CL9D-8GBXL) AMD A10-6800K 4.1GHz SkFM2 BE (AD680KWOHLBOX) MSI HD7850 OC 2GB (R7850-2GD5/OC) Disco Kingston 3K SSD HyperX 120GB (SH103S3/120G) Disco Western Digital Green 2TB SATA III 64MB (WD20EZRX) Cooler CPU Cooler Master Hyper103 (RR-H103-22PB-R1) LC-Power Gold Series 600W 135mm LC9650 V2.3