New ASUS build won't POST!!!!! First Build Pls help!!!!!

suave1847

Honorable
Jun 24, 2013
3
0
10,510
New build specs:

Intel Core i7 4770K 3.5GHz (Haswell) (Socket LGA1150)
HIS Radeon HD 7850 2GB Graphics
Asus Sabertooth Z87 MOBO
Corsair H80i Closed loop CPU cooler
Corsair CX 750M PSU
Corsair Vengeance Pro 16GB (4x4GB) DDR3 1866MHz
Crucial 128GB M4 SSD
WD 1TB SATA HDD
Antec P280 Case

It won't boot and the MemOK button stays lit..
I tried pressing the MemOK switch after several attempted boots to no avail, just blinks and then stays lit.
The only things definitely working are the fans.

Stripped everything down and reassembled.

Checked the CPU. I can't see any bent pins. They all look identical.

Ram - I originally had Vengeance 2133MHz 4X4GB. Noticed in the manual that the board supports up to 1866MHz so I exchanged RAM for 1866 Vengeance Pro's.
MemOK still permanently on and doesn't respond to being pressed.

Any advice would be greatly appreciated

 
Solution
Odd, I've built over 700 systems this way with four stick going back to 775 and all are running in dual quite nicely, thank you, the preferred way is 2 sticks but 4 still run in dual with a dual MC channeled CPU...just like running 6 sticks in tri - it's still tri or 8 in quad is still quad

suave1847

Honorable
Jun 24, 2013
3
0
10,510
It was either the Board or the CPU because everything started up just fine 1st time I tried. Thx for your help. Now to see if I can tune this machine. No idea what I'm doing. I did notice that the BIOS read my RAM as 1333MHz. I turned up to 1866 as they are 1866 sticks. Any thoughts as to why that would happen?
 

Tradesman1

Legenda in Aeternum
Wrong - the CPU runs dual channel makes no difference if running 2 or 4 sticks, it's still dual channel, and all 4 sticks will run at full spec,.. They came up 1333 as that is the mobo default boot speed, best way (if the BIOS is ready) is simply enable XMP, select Profile 1 and go,,,check in CPU-Z (free utility) the memory tab should show 933 under freq (It's DDR DOUBLE Data Rate do 933 x 2 = 1866 effective,,,

TenPC - need to learn at least BASICs of DRAM before offering advice
 

TenPc

Honorable
Jul 11, 2012
2,471
1
11,960


Sorry, you are WRONG. QUAD Channel Ram cannot run in Dual Channel slots utilizing all four sticks, only way to use Quad channel ram in dual channel is to use only two of them.
 

Tradesman1

Legenda in Aeternum
Odd, I've built over 700 systems this way with four stick going back to 775 and all are running in dual quite nicely, thank you, the preferred way is 2 sticks but 4 still run in dual with a dual MC channeled CPU...just like running 6 sticks in tri - it's still tri or 8 in quad is still quad
 
Solution