Tom's Hardware reviewed the ASRock X299 Extreme4 ATX Motherboard
A quote from the article:
Does ASRock’s $200 X299 Extreme4 have the features and stability to push value seekers into Intel’s “High End Desktop” platform?ASRock X299 Extreme4 ATX Motherboard Review
Similar prices between Intel’s Core i7-7800X and Core i7-8700K haven’t gone unnoticed by value-seeking performance PC builders. Both have six cores and 12 threads, but the i7-8700K is clocked higher and has more cache. The top processor in the mainstream segment looks like a clear value leader, until we consider the 7800X’s extra PCIe lanes. SLI can go more ways. CrossFire can be made faster. More drives can interface the CPU directly, rather than going through the chipset’s shared four-lane interface.
Yet just when you start to think that Core-X might be the way to go, you’re slapped with the reality of $300 motherboards. Maybe you can’t afford it? ASRock thinks it can help!