This is the error:

2021.03.21:19:31:59.444: GPU1 Light cache generated in 3.7 s (17.9 MB/s)
2021.03.21:19:32:00.342: GPU1 GPU1: Free VRAM: 7.948 GB; used: 0.052 GB
2021.03.21:19:32:00.342: GPU1 The option -clKernel 3 is ignored for GPU1 (not enough VRAM)
2021.03.21:19:32:00.342: GPU1 GPU1: Allocating DAG (4.16) GB; good for epoch up to #404
2021.03.21:19:32:00.350: GPU1 GPU1: Generating DAG for epoch #402
2021.03.21:19:32:07.984: GPU1 GPU1: DAG generated in 7.6 s (555.4 MB/s)
2021.03.21:19:32:07.986: GPU1 GPU1: Using Ethash OCL kernels (Ellesmere; -clkernel 1)

Still wondering how many GBs do you need to use Kernel 3. Benching in a lower epoch, I'm getting 0.250 more MHs with Kernel 3 than 1....