We’re restricted to a maximum of 24 PCIe lanes, 8 SATA ports, and 10 USB ports, with some of those hard-wired. The X299 brings 30 high-speed I/O lanes that can be tasked with PCIe, SATA, or USB connectivity, allowing us to mix and match depending on the priorities for each model and what’s plugged in at the time. That link is based on PCIe Gen 3, as is the chipset as a whole. It also serves as an affordable way to get started with an X299 motherboard now and upgrade to something more powerful when your budget allows.īoth classes of CPU have a four-lane DMI 3.0 interconnect to the new X299 chipset. Kaby Lake-X gives extreme overclockers and competitive benchmarkers a new way to push the limits with quad cores. However, the LGA 2066 socket can deliver more power to the CPU, and the 112W TDP is higher to account for that. These CPUs are limited to two memory channels and 16 PCIe lanes, so they don’t take full advantage of all the bandwidth and connectivity on the motherboard. The X299 platform can host a version of that silicon dubbed Kaby Lake-X. With so much of everything onboard, the 140W TDP for currently announced processors is considerably higher than the 91W rating for standard desktop CPUs like the Kaby Lake-based Core i7-7700K. The specs in this guide are based on 44-lane CPUs, but you can check the individual product pages for details on how the configurations change for 28-lane chips. While the 10-core Skylake-X variant has the full 44 lanes, 8- and 6-core models are limited to 28. That’s nearly triple what’s available in standard desktop hardware, though it’s not universal. Platforms like this are often fully loaded, and we don’t want you to have to sacrifice frequency to max out the memory capacity.Īn integrated PCI Express controller opens the floodgates to the CPU cores with up to 44 Gen3 lanes. ![]() They also use our exclusive T-Topology trace layout, which is optimized to maintain signal timing when all the memory slots are populated. Our X299 motherboards support up to two DIMMs per channel for a whopping 128GB of total system memory. Skylake-X CPUs have quad-channel memory controllers that effectively double the bandwidth available in standard desktop processors. I can’t wait to see the Windows Task Manager filled with 36 individual CPU utilization graphs for the range-topping Core i9-7980XE. All of these CPUs support Hyper-Threading, which can execute two threads per core, resulting in double the number of logical processor cores visible to the operating system. These processors will initially be available with up to ten cores, and that initial wave will be followed by models with 12, 14, 16, and 18 cores. If you crave more bandwidth and cores, Skylake-X is the way to go. The former follows a more conventional approach to high-end desktop CPUs, while the latter pushes standard desktop silicon to its limits on the new platform. They’re split between Skylake-X and Kaby Lake-X chips with very different priorities. The latest Intel processors fit into a new LGA 2066 pincushion otherwise known as Socket R4. If you’re curious about other platforms, check out our guides for AMD’s equivalent X399 along with standard desktop motherboards based on Intel Z370 and AMD AM4. Looking for something more workstation-oriented? We also have a family of WS X299 motherboards specifically designed for the job. ![]() This guide will help you pick the best X299 motherboard for your build. But which one should you buy? Here at ASUS, we have seven desktop models distributed between our ROG, Prime, and TUF families. ![]() In the process, they make possible a whole ‘nother level of potent workstations, extreme enthusiast rigs, and top-of-the-line gaming machines.Ĭore X-Series processors come with a new socket, so it’s time for a new motherboard. The new X299 chipset and its accompanying Skylake-X and Kaby Lake-X processors bring oodles of bandwidth and up to 18 CPU cores in a single socket. Every update is more of an event as a result, but they really pulled out all the stops this time. Intel’s high-end desktop platform is refreshed at a slower cadence than the rest of its consumer lineup.
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