Right, so, we don't know. This card hasn't been released yet AND there are ZERO reviews of it so far. Once there are actual reviews of this card, we might be able to venture a guess so waiting to ask questions like this until somebody has had the chance to actual run it through the paces would be a good idea.
I believe it might do ok. Check out Hardware Cunucks video on ryzen CPUs being tested with a 3080. The lowest ryzen used is worse than the 8600k and the 3080 will have a worse bottleneck than the 3070. So it could be a good source to get an early indication of any bottleneck before the 3070 is releases.
Doesn't much matter anyhow. Nobody I know of has been able to get one anyway. It will probably be at least weeks, likely more like a month or two, before these cards have any real widespread availability.