Sorry to necro, but this is driving me nuts.
GTA refuses to run above 45fps even with nvidia settings reset or set to performance, vsync off/adaptive/anything. GPU and CPU utilization never exceed 30 percent and 12 percent respectively, and no single core is close to maxed. Settings do not impact this phenomenon; I will get drops down to tens and twenties regardless of resolution or settings.
I’m running an i7-7700k stock with no thermal issues, and a gtx 1080 ti which is also not throttling or overclocked. My memory is ddr4-3600 running at full according to cpu-z.
I have reset GTA’s profile via vorpx several times to no avail, and this is a new install of Windows.