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I tried every BIOS/UEFI option I could find in order to get as near 4000Mhz memory speed as possible. So far my sweet spot is 3600Mhz 17-18-18-38-2T. Going beyond around 3618 produces errors in Memtest86 test #6 (64 bit block move). There isn't anything wrong with Memtest86 as the disk images I take under Windows 10 sometimes fail it's HASH test which makes it impossible to restore a disk image which of course is not a good thing. Can the fact that I have 64GB made up of 4x16GB sticks be a factor? I've read that the more memory and modules you have the more stress is produced thus decreasing the amount of overclocking you can accomplish. The good thing is that with my tight timings I achieve memory scores among the leaders in Performance Test. I suppose it could be the motherboard and/or BIOS/UEFI causing the problem which a BIOS update could fix.
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SPECS
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Corsair Graphite Series 780T Full-Tower PC Case.
GIGABYTE Z370 AORUS Gaming 7 Motherboard.
Corsair RMi Series RM1000i — 1000 Watt 80 PLUS Gold Certified Fully Modular PSU.
Intel Core i7-8700K CPU @ 5.0 GHz.
Corsair Vengeance LPX 64GB 4x16GB 4000Mhz CMK32GX4M2F4000C19 RAM. 3600MHz @ 17-18-18-38-2T
Onboard Realtek HD ALC1220
Dual ASUS PA249Q IPS 24" LCDs.
EVGA GeForce GTX 1080 Ti FTW3 GAMING, 11G-P4-6696-KR, 11GB GDDR5X, iCX Technology - 9 Thermal Sensors & RGB LED G/P/M.
Corsair Hydro Series H115i Extreme Performance Liquid CPU Cooler.
Corsair Lighting Nodes and LED strips.
2-Samsung 960 PRO M.2 500GB NVMe PCI-Express 3.0 x4 Internal Solid State Drive.
1-Seagate 2TB hard drive SATA6.
1-SanDisk EXTREME900 USB Device 450GB
1-Western Digital Black 4TB hard drive SATA6.
3x120mm Corsair LL Series RGB fans for the front of the case.
2x140mm Corsair LL Series RGB fans for the H115i Radiator.
1x140mm Corsair LL Series RGB fans for the rear of the case.
2x120mm Aigo R3 RGB fans on the bottom of the case.
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SPECS
----------
Corsair Graphite Series 780T Full-Tower PC Case.
GIGABYTE Z370 AORUS Gaming 7 Motherboard.
Corsair RMi Series RM1000i — 1000 Watt 80 PLUS Gold Certified Fully Modular PSU.
Intel Core i7-8700K CPU @ 5.0 GHz.
Corsair Vengeance LPX 64GB 4x16GB 4000Mhz CMK32GX4M2F4000C19 RAM. 3600MHz @ 17-18-18-38-2T
Onboard Realtek HD ALC1220
Dual ASUS PA249Q IPS 24" LCDs.
EVGA GeForce GTX 1080 Ti FTW3 GAMING, 11G-P4-6696-KR, 11GB GDDR5X, iCX Technology - 9 Thermal Sensors & RGB LED G/P/M.
Corsair Hydro Series H115i Extreme Performance Liquid CPU Cooler.
Corsair Lighting Nodes and LED strips.
2-Samsung 960 PRO M.2 500GB NVMe PCI-Express 3.0 x4 Internal Solid State Drive.
1-Seagate 2TB hard drive SATA6.
1-SanDisk EXTREME900 USB Device 450GB
1-Western Digital Black 4TB hard drive SATA6.
3x120mm Corsair LL Series RGB fans for the front of the case.
2x140mm Corsair LL Series RGB fans for the H115i Radiator.
1x140mm Corsair LL Series RGB fans for the rear of the case.
2x120mm Aigo R3 RGB fans on the bottom of the case.
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