Recently purchased a used gaming rig off of LetGo, which came with a EVGA GTX 950 FTW ACX 2.0 installed. My CPU is an AMD Athlon x4 860k. This is my first gaming PC, so I don't know much about overclocking. When I increase my GPU Clock Offset in EVGA Precision, I can only get to about +60MHz before Heaven Benchmark starts stuttering, producing artifacts, and eventually crashing. With the same GPU, I see other people getting to +100MHz more. Any ideas? Thanks for helping a complete newb, you have gained 10 karma points.