Frequency is typically measured in gigahertz (GHz), or billion cycles per second.Intel ships these processors to Original Equipment Manufacturers (OEMs), and the OEMs typically pre-install the processor. But the -9400F’s lack of Hyper-Threading and a locked multiplier allows the Ryzen 5 2600X to rise up as a more attractive option when we look at all-around utility in this price range.In either case, you can determine whether your CPU includes sTIM by checking its stepping. # of PCI Express Lanes is the total number supported by the processor.Intel® Transactional Synchronization Extensions (Intel® TSX) are a set of instructions that add hardware transactional memory support to improve performance of multi-threaded software.Intel® AES New Instructions (Intel® AES-NI) are a set of instructions that enable fast and secure data encryption and decryption. The highest officially supported memory speed is 2666 MHz, but with overclocking (and the right memory modules) you can go even higher. The CPUs also drop into an LGA 1551 interface, and they are supported by existing 300-series motherboards with up-to-date BIOSes. It features base / boost clocks of 2.9 / 4.1 GHz, 9 MB of cache, a 65W TDP and it ships with a cooler but it does not have integrated graphics like the “non-F” variants. See your Intel representative for details.CPU Cache is an area of fast memory located on the processor. To boost supply, the chip-maker decided to start selling CPUs that it would have otherwise deemed defective due to nonfunctional graphics units. Thank you for your feedback.A Thread, or thread of execution, is a software term for the basic ordered sequence of instructions that can be passed through or processed by a single CPU core.Thermal Design Power (TDP) represents the average power, in watts, the processor dissipates when operating at Base Frequency with all cores active under an Intel-defined, high-complexity workload. Interestingly, though, some Core i5-9400 models initially came with standard polymer-based thermal interface material (thermal grease), while others shipped with the more efficient sTIM. How to Enable Turbo Boost on I5. Frequency is typically measured in gigahertz (GHz), or billion cycles per second.Max memory size refers to the maximum memory capacity supported by the processor.Intel® processors come in four different types: a Single Channel, Dual Channel, Triple Channel, and Flex Mode. Intel VT-d can help end users improve security and reliability of the systems and also improve performance of I/O devices in virtualized environments.Intel Authorized Distributors sell Intel processors in clearly marked boxes from Intel.