There is obvious problem, if you hit 90+ temp you need to cool them. Maybe try take your radiator in ice bucket, if not you need to step up to single stage phase change cooler or dry ice or ln2. Thats definitely temp limit.
Did you try older version before 4K Catzilla introduced? Maybe different version make different score but no one find out the result difference. I dont comment this as judge or anything. Just curiousity if newer catzilla version made much higher score.
Best Regards,
Muhammad