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It is just doing horrible and it doesn't seem like the fans spin up until it has been that way for a while and even when they are running, it is doing basically nothing to help with those temperatures. Temps on the CPU are between 96C and 100C on the individual cores and on the package. At just about 1 minute into stability tests with Aida64 FPU test only (or CPU only test), it is thermal throttling to up to 50%.
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To see how things are working I tried running Cinebench and Aida64 and was shocked at how bad the thermals on this unit are. I just got my Surface Book 2 15 inch with i7-8650U, 16gb Ram, and 1 tb ssd. But should not get to and stay consistantly at 100 like my first one was. These machines are definitely going to be warmer running machines when on full performance and under a load due to the limited size of the computer. As long as it doesn't go up about 90 or so consistently it is probably okay. You can also use other tools like Aida64 to put it under synthetic load and see where the temperatures will go up to. My old one would actually fail in that as the cooling solution was allowing the processor to hit 100C. I would suggest those that are having problems, install and run the Intel Processor Diagnostic Utility and allow it to run a test on it. The max temp that that machine ever gets is in the mid to low 70s and that is it and that is in 90F ambient temperatures. With the OG Surface Book, I never experienced any issues with thermal throttling on that machine in anyway. It is only the 13 inch SB2 that is fanless. The Surface Book 2 15 inch does actually have a fan based cooling solution.
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Nostalgia: Amiga 1200, Tower Build, CPU/FPU/MMU 68EC020, 68030, 68882 Mhz, 10 MByte ram (2 MB Chip, 8 MB Fast), Fast SCSI II, 2 CDRoms, 2 1 GB SCSI II IBM Harddrives, 512 MB Quantum Lightning HDD, self soldered Sync changer to attach VGA displays, WLAN (Abit Fatal1ty FP9 IN SLI, C2Duo E8400, 6 GB Ram DDR2 800, far too less diskspace, Gainward Phantom 560 GTX broken need fixing) Media System: Asrock ASRock Z87 Extreme4/TB4, Intel Core i5 4460, 16 GB Ram DDR3 1600 ADATA XPG, 1 275 GB SSD, 4 Seagate Ironwolf 4TB HDD in raid 5, Gainward Phantom 560 GTX (the 560 will be replaced with one of the 760 due to better effeciency) On the Road: Acer Aspire 5 Model A515-51G-54FD, Intel Core i5 7200U, 8 GB DDR4 Ram, 120 GB SSD, 1 TB HDD, Intel CPU GFX and Nvidia MX 150, Full HD IPS display System 3 "Inskah" AsRock Fatal1ty Z77 Pro, Core I5 3570k 16 GB Ram DDR3 2133, some SSD, and a 2 TB HDD each, Gainward Phantom 760GTX. System 2 "Igluna" AsRock Fatal1ty Z77 Pro, Core I5 3570k 16 GB Ram DDR3 2133, some SSD, and a 2 TB HDD each, Gainward Phantom 760GTX. 32 GB DDR4 3600, some NVME SSDs, Gainward Phoenix RTX 3070TI Anghammarad : Asrock Taichi x570, AMD Ry MHz.
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