Asus: Sabertooth Fx 990 R 2.0 Boot device LED

Toggle sidebar Toggle sidebar
M

Mcomfort12

Honorable
Dec 26, 2013
8
0
10,510
Hello,

I decided to build a pc for the holidays.

AMD FX-8350 FX-Series 8-Core Black Edition

Kingston HyperX 3K 120 GB SATA III 2.5-Inch 6.0 Gb/s Solid State Drive

Corsair CX750 PLUS Bronze Certified Power Supply

ADATA Gaming Series DDR3 1600Mhz 8 GB Desktop Memory

EVGA GeForce GTX780

Everything is in the case but once I power it up it runs through the POST...
but only lights that blink are the DRAM then The CPU before its shuts off or reboots itself.

there are few occasions that the led process goes from DRAM -CPU- GPU-CPU-Boot Device then is shuts off.

Any help would be appreciated.

Thanks
 
Sort by date Sort by votes
jb6684

jb6684

Distinguished
Feb 20, 2011
1,554
1
20,460
Does the fan on the CPU cooler spin while system is starting???
Be sure 8 pin CPU & 24 pin cables are connected to motherboard....
Be sure the PCI-E power cables 6 & 8 pin are connected to GTX780....
Try booting with ONLY one DIMM, install in the slot recommended in the MB manual....
 
Upvote 0 Downvote
M

Mcomfort12

Honorable
Dec 26, 2013
8
0
10,510
@Alexoiu....change the thermal paste and reapplied fresh paste and cooler....same results...Ill remove the MB from the case and try it that way.

@ JB6684.... the cpu fan does spin while the system is starting. Power pins are connected. Ill try removing the connector the GTX came with and do a direct to power supply hook up and see if that helps.

Ill let you something soon
 
Upvote 0 Downvote
M

Mcomfort12

Honorable
Dec 26, 2013
8
0
10,510
ok removed mb from case....all that is connected is the CPU/fan...1 stick of memory...and both the 8 pin and 24 pin power connectors.....results
the stand by power light came on (green) the cpu fan did not run. No LED light flashed
 
Upvote 0 Downvote
M

Mcomfort12

Honorable
Dec 26, 2013
8
0
10,510
tested a different power supply...same result. I did test the new PSU in the old PC and it powered up just fine. right now i'm taking everything out of the case and hooking it up to see if it post's/boots
 
Upvote 0 Downvote
krazykev101

krazykev101

Commendable
May 28, 2016
26
0
1,540


 
Upvote 0 Downvote
krazykev101

krazykev101

Commendable
May 28, 2016
26
0
1,540
try this first,
ASUS tech support doesn't even help you, they just keep pushing you for an RMA. BUT THE REAL PROBLEM FOR ALL IS the 3 pin connector for the cpu . That's the culprit, You need to NEVER connect to the cpu power 3 pin female connector to the mobo 3 pin cpu fan male connector . You have to use the 3 pin female connector from the CPU on the 4 pin male connector just to the right of it on the MOBO called the cpu fan optional, it is a 4 pin male, but you use the 3 pin female cpu connector there and the embedded slot that places it in the right direction IS USED leaving 1 pin unused> so spread the word...the 3 pin male connector on the saber tooth FX990 is useless.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom