Overall Review: disapointed... overclock 4600 cl17 17 17 34 2T 350 " 1.65v stable with water cooling" 4500 cl17 17 17 34 2T 350 1.55v stable with replace to EK Heat sink 4400 cl17 17 17 34 2T 350 1.48v stable with normal Heat sink

Pros: 4600mhz cl18 22 42 dram 1.5v dram current 130% tm5a3 test pass

Cons: I have tested it in three environments. All three environments are PCs of different users. 1. bios 0903 version (latest) Maximus xi apex z390 + CPU 1.33v 5.1ghz (linx 20 cycle passed) 4800mhz cl18 22 42 dram 1.5v dram current 130% tm5a3 test fail.... 2. bios 0903 version (latest) Maximus xi apex z390 + CPU 1.34v 5.0ghz(linx 20 cycle passed) 4800mhz cl18 22 42 dram 1.5v dram current 130% tm5a3 test fail.... 3. bios 0903 version (latest) Maximus xi apex z390 + CPU 1.32v 5.1ghz (linx 20 cycle passed) 4800mhz cl18 22 42 dram 1.5v dram current 130% tm5a3 test fail.... gskill USA said : We test hundreds of CPUs to fine ones capable of it. It is up to the user to source parts capable of achieving it. gskill Taiwan said : so a highly selective CPU with strong IMC is required. You must have a very good CPU to get this RAM. It does not usually mean 9900k. 5.3ghz is a CPU running 1.3v. As Gskill USA said, it would be one of the hundreds.

Overall Review: I tried overclock. In my system is 9900k 5.2 + z390 apex The ram is base clock 3200cl14 My test result 4500 cl17 19 19 38 2T 320 success 4400 cl17 17 17 34 2T 320 success Both 4500 and 4400 Tm5 advenced4 tools = 30 cycle pass Fail case is 4600 clock 4600 cl18 19 19 fail 4600 cl18 20 20 fail