so if I adjust my voltage my motherboard won't be like 'overpower' since the video card is directly plugged to the motherboard and no external power to get from?
This is incorrect, if you actually own a Radeon 6850 then it will have a single PCI-E 6-pin power connector. So your concerns about overdrawing power from the motherboard are unwarranted; if anything I'd worry about your PSU and even then only if it was a low quality brand.
so if I adjust my voltage my motherboard won't be like 'overpower' since the video card is directly plugged to the motherboard and no external power to get from?
so if I adjust my voltage my motherboard won't be like 'overpower' since the video card is directly plugged to the motherboard and no external power to get from?
This is incorrect, if you actually own a Radeon 6850 then it will have a single PCI-E 6-pin power connector. So your concerns about overdrawing power from the motherboard are unwarranted; if anything I'd worry about your PSU and even then only if it was a low quality brand.