AMD 3600 with 3070 Ti may face performance limits.
AMD 3600 with 3070 Ti may face performance limits.
3070ti may limit your experience at 4k regardless of title. 1440p offers a slight improvement but can struggle with the 3600 frame rate. A jump to 5600x or higher might help, though it could be costly. If you can get the 3600 for around $150, upgrading to a $300 5600x would feel like a solid investment. A bit more for the 5800x could also be worthwhile.
I wouldn't settle for anything below a 3080 for 4K gaming, especially with 144hz included. Regarding the 3600 bottleneck, it shouldn't matter at 4K since the 3070Ti will be the main constraint. I also question whether it could slow down a 3070Ti significantly even at 1440p, except in poorly optimized titles (like Ubisoft). If the cost is reasonable, I'd suggest moving up to a 5600X or 5800X.
Technically (we often emphasize this) if it isn’t the absolute fastest CPU on the market right now... then yes, it can act as a bottleneck and limit your GPU’s performance compared to top options. At 4K resolution this effect will be less obvious but still present. PS: I share your view—anything under a 3080 feels like a subpar experience at 4K. Also, your friend might benefit from a fresh monitor. 4K high-refresh gaming won’t be practical for another few years; that was a costly mistake.
He bought it for versatility and home use, but already owned a decent LG 27" 4K for several years. He switched to the 27GN950 to finally enjoy a gaming monitor with the same high definition. Once you reach 4K... you never go back (I still have the same one). I've been using multiple 4K monitors for years, and I appreciate them beyond just gaming—though I sometimes lower it to 1440p (1080p) for shows like Cyberpunk. 4K is great for work, reading, editing, and graphics. I do think a 3080 offers the best entry into modern high-resolution gaming for newer titles, though older games can still run well at lower settings.
The same applies to a 3070Ti or even a 3070. If your friend is okay lowering graphics quality in games, the 3070Ti can manage 4K experiences in newer titles when needed. More intense games such as Cyberpunk will definitely require RT effects reduced or disabled and DLSS activated. It should work fine on medium to high settings with DLSS turned on.
back then there was a joke about a 3600 turning a 2080 Ti into a 2080, and it seems similar applies to a 3070 Ti—just maybe a bit worse. Usually, below 80fps the GPU becomes the main issue in most AAA titles. I’d estimate around a 20% CPU bottleneck for games that rely heavily on CPU, and the lower end will be closer to 1%. If the system already has a 3600, upgrading to a 5800x might not be worth it unless you really need it.