There is a $50 difference in price between these two chips, $390 versus $340, which will be within the price range of many of enthusiasts. The i7-7700K's cores run at a higher frequency but there are only four whereas the i7-7800X has a half dozen. The memory configuration is also a factor, with the Skylake chip offering quad channel memory while the Kaby Lake only offers dual channel. The size of the cache may not have a huge impact on gaming performance but you need to consider the number of PCIe lanes; is 16 sufficient or will you need 28?
"Although we consider the Ryzen 5 1600 to be the sweet spot for building a new high-end gaming rig, many of you interested in going Intel want to know whether it makes more sense to buy the Core i7-7700K or the new 7800X?"
Here are some more Processor articles from around the web:
- Intel Core i9-7900X X-Series 10-Core @ eTeknix
- Intel Core i7-7740X ‘Kaby Lake-X’ @ Kitguru
- Intel Core i7-7740X Skylake-X @ eTeknix
- NVIDIA vs. Radeon Vulkan & OpenGL Performance With A Celeron, Pentium & Core i7 @ Phoronix