GTX 1070 Vsync causes frame rate to plumit. Is my CPU throtting it?

[SRRAE]

My basic spec is:
CPU: i5 2500K (overclocked to 4.7Ghz)
MEM: 16Gb Corsair Vengeance 1600Mhz
Motherboard: Asus P8P67 LE
Graphics: MSI GTX 1070 Gaming ZX (Overclock GPU: 2150 Mem: 4404)
Monitor LG34UC88 (3440x1440)

I mostly play racing and space sim games such as Elite Dangerous. With everything maxed out I get about 70-80 fps 95% of the time with the odd time dipping below 60fps. During gameplay I notice a bit of stuttering which I put down to unsynced refresh rate. So I enable Vsync in game.

Now the games frame rate drops to below 60 usually bouncing around 50-55fps and the GPU is only working at 70%-80% or so. It's quite rare that the frame rate reaches 60 and stays there for any useful amount of time. Its almost like the card isn't being told that it needs to work harder.

The CPU on the other hand, playing elite dangerous seems to be sat at 30-40% while on Forza is at 80+% on core 1, 30% core 3 and cores 2 and 4, are doing nothing.

I can't see a reason, particularly in Elite dangerous why the GPU would struggle to reach 60 fps.

Could my CPU be limiting the graphics card's ability?

Thanks

 

[Kevin_Genesis]

what happens when you disable V-sync then ?

 

[RobCrezz]

Go into Nvidia control panel, 3d settings, set the global setting for power options to Max performance, see if that helps.

 

[boju]

I doubt your CPU is holding your card back.

If it's not software related, maybe try updating your bios to the latest version.

And compare your system memory bandwidth speeds using Maxxmem http://www.maxxpi.net/pages/downloads/maxxmemsup2---preview.php
I had come across a person here with lower than usual performance with a high end card and it came down to (for him)poor system memory performance which a different set of ram helped.

Either case gpu or memory if there are incompatibilities somewhere, an bios update if available could help.

 

[SRRAE]

what happens when you disable V-sync then ?

V-Sync disabled I'm getting 70-80fps, V-Sync enabled it drops to about 50-55fps

 

[SRRAE]

Go into Nvidia control panel, 3d settings, set the global setting for power options to Max performance, see if that helps.

That has helped a little, its reaching 60 more often and doesn't seem to be bouncing around 50fps as much