Gtx 770 gpu-z vddc weird readings?

Mynthon33

Honorable
Jan 27, 2014
1
0
10,510
Gpu-z shows my gtx 770 factory oc 2gb vddc and vddc power arent continuous. While idling they change from vddc 0.850 V to -- V and vddc power about 2 W to -- W. This happens while gaming too. Very very often, and looks random.

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Specs:
Msi gtx 770 twin fronz oc 2gb
i5 4670k
Asrock z87 extreme4
Seasonic G-series 650w