I'm upgrading an older secondary PC for my fiancée, mainly for Minecraft, Stardew Valley, Portal 2, It Takes Two, and similar games. We usually play at 1080p and 60 Hz, though 1440p might be an option later. The system currently has an Intel i5-6600K, an ASUS GTX 1060 6GB, an ASUS Sabertooth Z170S motherboard, 16GB of DDR4-2133 memory, and an EVGA 850W 80+ Bronze power supply.
I can buy a GTX 1080 Ti with 11GB of GDDR5X memory and a recently installed aftermarket AIO cooler for under $150. The seller has tested it, and I would install it in my own system and test it before paying. Even if it isn't a practical upgrade, the 1080 Ti is a bit of gaming history and seems like a fun card to own.
Would it be a worthwhile upgrade from the GTX 1060 with this CPU, or would the i5-6600K create too much of a bottleneck? I'm also considering replacing the old power supply and CPU cooler because the system is around eight years old. Would a newer, lower-power card be a better choice?
4 Answers
Your i5-6600K will probably hold the card back in some games, especially in frame-time consistency and 1% lows. Average FPS may look fine, but newer or CPU-heavy games could stutter. The DDR4-2133 memory is also quite slow; check whether XMP is enabled, since the kit may run faster than its default speed.
The existing 850W supply has plenty of capacity, but its age matters more than the wattage. Replace it if it has been heavily used or is nearing the end of its service life, and don’t assume the GPU’s custom cooler will last forever. For the games listed, the 1080 Ti should be more than enough, but the CPU upgrade would eventually be just as important as the GPU.
For a purely practical upgrade, I’d lean toward a newer card such as a used RTX 3060 or RX 7600 XT. They’re more efficient, newer, and offer better support for modern features like upscaling. However, if you specifically want the 1080 Ti and can verify it in person, under $150 is reasonable as long as you accept the extra AIO risk.
The 1080 Ti is still a capable card, especially for 1080p and 1440p gaming, and that price is attractive if the card and AIO are genuinely healthy. It can provide a substantial jump over the GTX 1060. Just remember that an old custom AIO adds another failure point, so check temperatures, pump noise, leaks, and mounting before buying.
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