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PC won't boot untill i reset CMOS

Greetings, in general I am new to forums this type. I ran into an issue with new setup i just made. 

Problem is after I put new parts into PC (CPU, MoBo, RAM), PC wont boot. It turns up, RGB from MoBo and RAM works, but no boot screen. 

Any help welcome :D


Currently in PC:
CPU Ryzen 7 2700

MoBo Aorus x470 ultra gaming

PSU Chieftec eco series 700

RAM HyperX predator 1x8gb 2933 (currently until new arrive)

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So first time you tried to boot it no posted.  So you removed CMOS, and it posted.  Then turned it off and it wont post, so you pulled CMOS and then it posts - rinse repeat - correct?

 

What slot is your single stick of RAM in?  I believe it should be in DDR4_1 slot with only 1 stick available.

 

Current in process build: Project Odyssey - Build Logs - Linus Tech Tips

Workstation Laptop: Dell Precision 7540, Xeon E-2276M, 32gb DDR4, Quadro T2000 GPU, 4k display

Ryzen Rig 3: ASRock B450m Pro4, Ryzen 5 3600, ARESGAME River 5 CPU cooler in push/pull, EVGA RTX 2060 KO, 16gb (2x8) 3600mhz TeamGroup T-Force RAM, ARESGAME AGV750w PSU, 1tb WD Black SN750 NVMe Win 10 boot drive, 3tb Hitachi 7200 RPM HDD, Fractal Design Focus G Mini custom painted.  Lenovo 27" 1080p 60hz placeholder monitor, generic mouse, generic keyboard.  Still a work in progress

NVIDIA GeForce RTX 2060 video card benchmark result - AMD Ryzen 5 3600,ASRock B450M Pro4 (3dmark.com)

Ryzen Rig 2: ASrock B450 Pro4, Ryzen 7 1700 @ 4.2ghz all core 1.4vCore, AMD R9 Fury X w/ Swiftech KOMODO waterblock, Custom Loop 2x240mm + 1x120mm radiators in push/pull 16gb (2x8) 3600mhz V-Color Skywalker (or 4x8gb DDR4 2666mhz for large tasks), Corsair HX850 PSU, 250gb Samsun 960 EVO NVMe Win 10 boot drive, 500gb Samsung 840 EVO SSD, 512GB TeamGroup MP30 M.2 SATA III SSD, SuperTalent 512gb SATA III SSD, CoolerMaster HAF XM Case.  Zalman K600S keyboard, Zalman ZM-GM1 mouse, Viotek GN24C 24" 1080p 144hz curved and Hannspree HF207 as 2nd monitor

https://www.3dmark.com/3dm/37004594?

Ryzen Rig 1: ASUS B350-PRIME ATX, Ryzen 7 1700, Sapphire R9 Fury Tri-X Nitro 4gb HBM, 16gb (2x8) 3200mhz V-Color Skywalker, ANTEC Earthwatts 750w PSU, MasterLiquid Lite 120 AIO cooler in Push/Pull config as rear exhaust, 250gb Samsung 850 Evo SSD, Patriot Burst 240gb SSD, Cougar MX330-X Case.  Zalman K600S keyboard, Zalman ZM-GM1 mouse, Acer XF270HU 2560x1440 144hz IPS monitor

https://www.3dmark.com/3dm/37628874?

Dell OptiPlex 3040 MFF: Dell 0MGK50 A02, i3-6100T, 2x4gb DDR3 1600, Team Group 120gb SSD, 500gb Seagate 7mm HDD attached storage, Windows 10 Pro, Logitech K400+, USB Wifi adapter all vesa mounted to the back of a 37" 1080p TV 

Linux Box: Toshiba Laptop, i7 620M, NVS graphics, 4gb ram tinker toy at the moment.  Running Manjaro XFCE at the moment.

Home Security: ZOSI 8 channel CCTV (4 used at this time, 1080p) DVR H.265+, 3tb HGST Enterprise HDD, ASUS monitor for display

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Something like that, but it started when i tried to change RGB Fusion and RAM speed directly from BIOS, as RAM is on 2400Mhz RN, and i tried it with XMP profile 1 on 2933Mhz. After that i save and exit and it didn't post. When i normaly turn down PC and turn it again it starts again, but when i leave it for few minutes, it wont start.

Currently it is working with last CMOS reset, without touching BIOS settings at all.

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