Hi cashew,
You may have to depend on your luck on the CPU chip you bought. Even for the same model of CPU, there will be variations in the manufacturing, therefore will have variations in CPU temperature also.
This is one of the link, where others have tried changing CPU, with reaching near maximum temperature (100C) under full load.
If possible, try to get the best possible thermal paste, as laptops have limited cooling capability.
You could also use TPFanControl to override default fan control, and to push your fan speed to the maximum.
Peter
ThinkPad X40 | ThinkPad W520 | ThinkPad T560 | ThinkCentre E73 SFF | Yoga 11s | Yoga 3 Pro | Yoga 900 | Yoga Home 900 | Yoga Tablet 2 Pro | Miix 2 10" | IdeaPad Y460p | IdeaPad K1 | 3000 Y300 | Vibe K5 Plus
Give kudos to reward people for their assistance | Mark thread solved if the solution works | I am an active volunteer, not an Lenovo employee
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List of Sound Enhancement Thread
T520 | W520 ; Dolby ; IdeaPad Slate Tablet ; Yoga 3 Pro ; X100e ; Vibe Shot ; Yoga 900 ; P50 ; P40 Yoga | Yoga 14 | Yoga 460 ; T560 | P50s ; Vibe K5 | K5 Plus ; M0620 Speaker Mod
Peter
ThinkPad X40 | ThinkPad W520 | ThinkPad T560 | ThinkCentre E73 SFF | Yoga 11s | Yoga 3 Pro | Yoga 900 | Yoga Home 900 | Yoga Tablet 2 Pro | Miix 2 10" | IdeaPad Y460p | IdeaPad K1 | 3000 Y300 | Vibe K5 Plus
Give kudos to reward people for their assistance | Mark thread solved if the solution works | I am an active volunteer, not an Lenovo employee
=====================================
List of Sound Enhancement Thread
T520 | W520 ; Dolby ; IdeaPad Slate Tablet ; Yoga 3 Pro ; X100e ; Vibe Shot ; Yoga 900 ; P50 ; P40 Yoga | Yoga 14 | Yoga 460 ; T560 | P50s ; Vibe K5 | K5 Plus ; M0620 Speaker Mod