So I put my EVGA X299 together. Turn the power supply on and starts up. I thought that is odd. Anyway, I go into bios to make sure everything shows up as it should. All is good. F10 enter reboots back into bios settings. Power off CMOS reset power on and starts right up without hitting the power button. CMOS checksum error F1 to skip F12 to enter setup. Well F1 does nothing, press F12, goes to bios settings. Save and exit goes right into bios settings. Tried the other bios' same thing. Remove CPU reinstall. No change. Update bios. No change. All components show in bios. CPU 9800X mem G.Skill trident. all default settings nothing overclocked.

Well is what I thought. Hard drive shows in bios.

Also if shut off with power button, go off and powers right back up.

Sajin
Have you tried to install windows yet? Is your boot order set correctly inside the bios?

Can't get to that.
 

trying that now.

Yeah.

awalleyeguy
Wouldn't work, is working with DVD. 
could the issue have been that drives had been in another windows 10 machine? 

 
Windows 10 installations rarely move over from system to system due to the way the Master Boot Record, MBR, works with UEFI. You are likely going to need to reinstall Windows, or you can try changing your CSM Storage configuration settings to check if that would help.

GGTV-Jon
I don't see where the OP stated which x299 board he has, what bios version and what power supply.

If his system spec's are in a signature, sorry, it doesn't show on my phone.

Intel Core i7 2600K
Windows 7 Ultimate Edition SP1 (Build 7601)
CPU Arch : 1 CPU - 4 Cores - 8 Threads
CPU PSN : Intel Core i7-2600K CPU @ 3.40GHz
CPU EXT : MMX, SSE (1, 2, 3, 3S, 4.1, 4.2), EM64T, VT-x, AES, AVX
CPUID : 6.A.7 / Extended : 6.2A
CPU Cache : L1 : 4 x 32 / 4 x 32 KB - L2 : 4 x 256 KB
CPU Cache : L3 : 8192 KB
Core : Sandy Bridge (32 nm) / Stepping : D2
Freq : 5663.17 MHz (101.13 * 56)

MB Brand : Asus
MB Model : Maximus IV Extreme-Z
NB : Intel Sandy Bridge rev 09
SB : Intel ID1C44 rev 05
GPU1 Type : NVIDIA GeForce GTX 580
GPU1 Clocks : Core 920 MHz / RAM 2250 MHz
GPU2 Type : NVIDIA GeForce GTX 580
GPU2 Clocks : Core 920 MHz / RAM 2250 MHz

 
Here's the information grabbed from his CPU-z sig, it's an old build but he may be trying to move over the Windows 10 installation from this system to his new X299 System.

You should go back to Bios 1.18 and use New Drives.
Or Clean all your Drives with diskpart this then makes them new to Windows 10.
Disable CSM and set to UEFI Boot Disable Fast Boot in the Bios.
Are you using any M.2 Drives if so they Must Be NVMe PCIe M.2 Drives.
M.2 SATA Drives will Not Work on your X299 Dark Motherboard.
What Graphics Card are you running?
What Make Model of your Power Supply and Age are you using?
 

Also on the X299 Dark MB and others as well the fist power on can take 2-3 Restarts because the memory.
You Must allow this Process to Compete Each Time, my X299 with 32GB of memory takes 2 Restarts my X299 with 64GB takes 3.
And can take up to 7 minutes to complete this Process.
Learning to Training the Memory and CPU. This also will happen after you remove the CMOS Battery or Press the Small Red Button on the Motherboard or on the Real I/O Panel.
Do Not Treat this X299 Motherboard as if it were an X99 Motherboard, there are lots of changes between the two Chipset Platforms.

Yep! X299 DARK - hard boot, getting "CMOS checksum error" ----> DEAD CMOS Battery

awalleyeguy
 Thanks for all the help. All is working well now. Even have win7 installed.
The battery is/was not dead.

Any Benchmark Links?

rangerscott
Same problem here. Brand new dark board and G3 1000w power supply. Can only power into the bios. All things show up correctly.
Replaced cmos battery even though it was showing 3 volts.

Welcome to the Forum
Did you update to Bios 1.18?
What is you cannot do?
 
Did you do want was Posted Above?
Clean all your Drives with diskpart this then makes them new to Windows 10.
Disable CSM and set to UEFI Boot Disable Fast Boot in the Bios.
Are you using any M.2 Drives if so they Must Be NVMe PCIe M.2 Drives.
M.2 SATA Drives will Not Work on your X299 Dark Motherboard.
What Graphics Card are you running?
What Make Model of your Power Supply and Age are you using?

rangerscott
Yo yo yo. Hope to get help as these are my last evga products I'll be buying.

You might want to create your Own Thread to help solve this.
 
Information about your Computer to allow members to help you.
 
Motherboard
Make:
Model:
Bios Version:
Is Bios Current Yes or No.
CPU
Model:
Settings:
 
Memory
Make:
Model:
Settings:
 
M.2 Devices:
Socket 1:
Socket 2:
Socket 3:
 
GPU/Video Card
Make:
Model:
Driver Version:
 
GPU/Video Card
Make:
Model:
Driver Version:
 
GPU/Video Card
Make:
Model:
Driver Version:
 
PSU
Make:
Model:
AGE:
Using One PCIe Power Cable or Two Separate PCIe Power Cables?
Location US, EU, Other for Voltage or Power.
 
Monitor
Make:
Model:
Video Cable Type Used:
 
Monitor
Make:
Model:
Video Cable Type Used: 
 
Monitor
Make:
Model:
Video Cable Type Used: 

TV’s
Make:
Model:
Video Cable Type Used:
 
Other PCI/PCIe installed Devices
Make:
Model:
Slot Number Installed:
Driver Version:
 
Other PCI/PCIe installed Devices
Make:
Model:
Slot Number Installed:
Driver Version:
 
OS:
OS Version:
Service Pack Level:
Windows/Patch Level: