i just got a new motherboard and i accidentally got got pcie x16 instead of 2.0, would that make a big difference? I notice the card not getting as hot and running heavier loads through gpuz, it does have more room to cool tho vr older setup. It summing like 98% load from what the gpuz says which is why i question if i have a problem. Im no currently running swan sync as ive never had to in the past to keep up with normal run times. im running asus 570 on asus m4a78lt-mle

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plus i still have huge run times not running boinc on cpu

Your motherboard has one PCIE 2.0 x16 slot. So nothing to worry about there.
It's most likely that the GPU went into low power mode for some reason. A restart usually helps in such cases. Keep an eye on the temps, fan speed and GPU frequencies using software such as MSI Afterburner.

Just so you have some numbers to compare yours with, my GTX 570 (Asus card) runs as follows:

Graphics clock: 742
Memory clock: 1900
Processor clock: 1484
Temperature: 62 Celsius
Fan speed: 85%