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Trouble getting RAM to reach 1866MHz on Biostar TA990FXE mobo

post #1 of 24
Thread Starter 
My System:
Motherboard: Biostar TA990FXE
Memory: 16GB(4x4GB) Corsair Vengeance DDR3 1866MHZ
CPU: AMD FX 8150
OS: Windows 7 Home Premium(64-bit)

My problem is that with BIOS defaults, The system says my RAM is 1333MHz. The specs on this board says it will "Support Dual Channel DDR3 2000(OC)/1866/1600/1333/1066/800 MHz". It doesn't say I must OC to reach the 1866MHz, and I expected that this setup would recognize and run my RAM at its rated(w/o OC) speed. Unfortunately, I was wrong. When I contacted Biostar support for help, They replied:
Code:
The default memory clock is rated at 1333Mhz.  Any speed beyond this will require overclocking.
  Changing the memory frequency may require other changes.

Please update the BIOS to latest to increase oveclocking stability.

Technical support does not provide help for overclocking.  We provide these features for the end-users
 to benefit from, but you overclock at your own risk

OK, so I checked and I have the most recent BIOS. Then I went to O.N.E. in the BIOS and set the Overclocking to MANUAL, then set DRAM TIMING to 1866MHz, saved and rebooted....
NOTHING!! Now my PC wouldnt even bring up a POST screen! The LED display on my mobo showed a "50", which isnt defined in the manual. So I had to reset the BIOS to get my PC to boot again. Can someone help me get this setup to use my RAM at its 1866MHz speed , rather than the 1333MHZ it is defaulting to?
post #2 of 24
Maybe change the timings for the RAM. Find out what exact RAM you have and the timings. It should be four numbers with dashes in between. Try placing the 4 numbers into tCL, tRCD, tRP and tRAS. Set everything after tRAS to auto if you can.
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Core i7 2600K Biostar TZ68A+RCH Sapphire FLeX Radeon HD 6950 2GB 8GB G. Skill Ripjaws F3-10666CL9D-8GBRL 
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Hard DriveOptical DriveOSMonitor
Seagate Barracuda 250GB HDD+ ADATA S599 128GB SSD Lite-On iHAS424-98 Windows 7 Professional SP1 64-bit Lenovo LS2421p 
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post #3 of 24
Thread Starter 
Here are my memory specs regarding timings:
328

So you said to manually input 9-10-9-27 if i understand right, and set ALL others to auto.
so i did... here is what CPU-z says now:
405

and here is what always shows in the SPD tab of CPU-z:
406
post #4 of 24

Increase the tRC to the rated value of 48.  Command rate at 2T.  Now try the DDR3-1866 x9.33 RAM multiplier again (no ref clock overclocking needed, the FX can run 4 DIMMs at 1866 just fine).

post #5 of 24
Thread Starter 
Ok, so I set the manual settings to:
tCL 9
tRCD 10
tRP 9
tRAS 27
tRC 48
CMD 2T
and DRAM CLK 1866MHz
now it wont boot even to POST and the LED display on my mobo shows a "54" and continuously beeps steady.
So I shut it off and tried booting again and..... no POST and the LED display on my mobo shows a "50" again.
Had to reset bios again to post you these results.

P.S.
If I leave the BIOS at Defaults with the exception of changing the DRAM Frequency to 1600, with all Timings to "auto", the PC boots fine and runs the RAM @ 1600MHz. Why doesn't it work that easy setting it to 1866?!?!?!?
post #6 of 24
Q: did you set the ram voltage to 1.65?
speeds of over 1600mhz require more than 1.5v with current gen chips..
i.e. 1.65v
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post #7 of 24
Thread Starter 
I havent tried changing any voltages until your post, due to the specs in the first pic of my earlier post.But i tried setting the voltage to 1.65 just now anyway with the Settings used in my most recent post, but still had the same exact result as before the voltage change. :-(
post #8 of 24
ram is very finicky on fx platform..play with the timings...a)make sure they;'re set to spec..
then b)loosen trfc and tras..

x-x-x-tras trfc
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OCZ Agility2 40GB Lite-On Rasa Waterblock + Bong Samsung 2 ms 
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CPUMotherboardGraphicsRAM
Sempron 145 powah! er..or..Thuban with 4 coars ;) Crosshair 4 GT 240 Samsung @ 7-8-8-20 
Hard DriveOptical DriveCoolingMonitor
OCZ Agility2 40GB Lite-On Rasa Waterblock + Bong Samsung 2 ms 
KeyboardPowerCaseMouse
dell Thermaltake Tr2-800 Elite 330 cheap 
Mouse PadAudio
Newegg box flap onboard 
CPUMotherboardGraphicsRAM
2500K Gimped @ stock Gigabyte H61-DS2 XFX 5870 800/1250 The Samsung RAM (Awesomeness) 
Hard DriveCoolingOSMonitor
Crucial m4 64 Sunbeamtech Core-Contact 92 attached via zip-ties. Varies Samsung 2ms 
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varies Corsair GS800 eMachine cheap 
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post #9 of 24
Thread Starter 
I have even went through and changed every setting to exactly match pic#1 in my 2nd post, and it wont even boot to POST with those settings! I am extremely frustrated and annoyed that it is so hard to get a board to do what it should be doing automatically! If the board is supposed to support 1866MHz RAM without overclocking, then it should sense this Ram and run it without any tweaking! for Goodness sake, The BIOS can see and display the XMP settings on the RAM; why wont it use them?!?
post #10 of 24
My chip won't post at 1866 either, but it will do 1800 CL8 1T all day long. I haven't yet tried loosening timings to max yet. I might.
 
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Shnoodle 2009
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H97 2014
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OCZ Vector 150 WD Black TPC-612 Windows 8.1 
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ASUS VH236H Logitech G105 Capstone 550m HAF XB 
MouseAudio
Logitech M570 ATH-M3X 
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