Just a new PC build with Core i7 4790k asus z87 pro corsair vengeance 8GB 1866mhz Seagate 3x 3tb 7200rpm Cryorig H5 ultimate cooler Corsair VS550 psu new gpu Zotac 1050ti OC. I haven't installed clean windows for this build. Using previous installed windows 10 pro x64 that I'm using in old pc. Q.1 : Never overclock cpu and Gpu. But Gpu coreclock is between 1734 to 1780 out of the box i haven't overclock it. Is this ok ? Q.2 : I'm having stuttering issues in almost every game. I've check through msi afterburner. Like in cs:go when I am shooting fps drop from 254 to 120. In Gta V while driving fast it was stuttering mostly after 10mints fps drops from 60-70 to 30-35. Temps were fine cpu temps don't go above 61c and gpu 59c. I've already run ddu and did clean install nvidia graphic drivers. No apps running in background. Do I need to clean install windows 10 also as I have change my whole pc setup ? What could be done to overcome this stuttering issue. Any help would be highly appreciated.