What problem are you trying to solve? I would not upgrade hardware to try to reduce crashes. You are trying to get more performance? HEVC @ 4K60 is fine as an output format as it's space efficient, but is just not well suited for editing today, its too tough on hardware.
For your 580 card are you on the latest Radeon Pro/Enterprise driver?
Nice, that's a great camera. You didn't post media info, but the footage is internally recorded 10-bit 4:2:0?
I don't think Vegas will work reliably or quickly with 10-bit HEVC @ 4K 60p. If proxy files aren't working right, consider transcoding to a 10-bit intermediate format.
Legal, é uma ótima câmera. Você não postou informações sobre a mídia, mas a filmagem foi gravada internamente em 10 bits 4: 2: 0?
Não acho que Vegas funcionará de maneira confiável ou rápida com HEVC @ 4K 60p de 10 bits. Se os arquivos proxy não funcionar direito, considerar a transcodificação para um formato intermediário de 10 bits.