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New computer wont post with 4x ram in, no problems with 2x sticks.

BrooksyX

BrooksyX

Joined
Jan 7, 2008
Messages
3,924 (0.62/day)
System Specs
System Name Main / Home Media Serever
Processor Intel i5 2500k @ 4.75ghz / AMD AM3 5200+ x2
Motherboard ASRock Fatal1ty P67 Performance / Biostar 790GX
Cooling Xigmatek Dark Knight / XIGMATEK Apache
Memory 12gb of G.Skill Value Series DDR3 / 4x 1gb DDR2
Video Card(s) XFX Radeon 6870 1gb / Asus Radeon 5450 512mb
Storage 2x Samsung 830 64gb SSD Raid 0 & 750gb WD Blue HDD / OCZ Vertex II 80GB & 10TB of HDD Space
Display(s) 2x Acer 24" LED / Samsung 50" LED
Case Xigmatek Asgard II / APEX PC-389-C
Power Supply Rosewill 750w / Antec EArthwatts 380w
Software Windows 7 Professional x64 SP1 / Ubuntu 14.04
So I just finished building a new rig today. And my motherboard will not post with my 4x ram sticks in and it wont post if 2x ram sticks are in the same channel. It has no problem booting with 2x sticks, with each being in the right slot of the channel. (i can post a diagram if thats confusing.) Anyways i flashed the bios to an older one and it worked for about 2~3 hours. Now its not working again, I am only using half my ram.

Ram: Kingston HyperX Blu 4GB (2 x 2GB) 240-Pin DDR3 SDR...
Motherboard: MSI 870-G45 AM3 AMD 770 ATX AMD Motherboard

Do you guys just think its an incompatability problem and I need to return the ram? Tomorrow I can tear my build apart to see if its beeing shorted out or something. Or my roomate has a rig with some ddr3 i could try to throw in the mix.

Any help please :confused:


Here are some more details on my current build:
http://www.techpowerup.com/forums/showthread.php?t=149529
 
check the ram packaging for the required voltage and set this manually in the bios

try to post with one stick at a time in the first slot

run memtest from your windows dvd (assuming windows)

(clock all your ram back to 1333 in the bios and tighten the timings)
 
Last edited:
Did you make any changes to the bios after you flashed it? Sounds like you have an incorrect setting. Try clearing the cmos and see what happens. At least it won't hurt anything.
 

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twilyth said:
Did you make any changes to the bios after you flashed it? Sounds like you have an incorrect setting. Try clearing the cmos and see what happens. At least it won't hurt anything.
Click to expand...

ive cleared the cmos several times and lowered the speed. ill check the manual settings.
 
Have you checked the ram settings and voltages, maybe bump up the ram voltage to 1.8 and check timings. I know a lot of AMD boards do not like 1600mhz cas 7 or 8, make sure it is set to cas 9.

I would also bump up your NB/CPU volts a little , say 100mv and see if that helps.
 
I just don't get why it worked and then it stopped. I didn't change any settings. Not having any luck with my room mates ram either...
 
It does sound like voltage except for the one time it worked for a couple of hours. Sounds like a good working theory. :)
 
So up the northbridge voltage? Ram or both?
 
I'm not going to pretend to know enough about this stuff to give that sort of specific advice. I've fried too many motherboards to have much credibility. I was mainly agreeing with Drunken mafia. :)
 
Think I got it figured out. Have to manually set ram to 1600 in BIOS. Got it to post by doing that
 
yes but it probably wont be stable.
you need to increase your NB clock and voltage.


this is similar to me using the dual channel with DDR2 1066MHz sticks. i have my NB @ 2700MHz and 1.45V, mem divider is set to DDR400 which means my effective speed is DDR2 1080. My system is stable 24X7.

otherwise before doing all this i could only use in single channel mode or one DIMM per channel. dual channel would post but, BSOD'd later when stressing.
 
Yep, I agree. Some boards just need that extra voltage on the CPU-NB to cope with certain memory configs/speeds. I have been running mine at 1333MHz but wanted to try the 1600MHz. It would boot and actually not bsod but benchamrks/linpack was showing a loss in performance.

Upped my CPU-NB to 1.3250v and has now just passed 20 linpack runs with slightly better performance and solid as a rock. My NB is at 2600MHz incidentally.
 
Sorry for posting and then bailing out, got caught up with the kids. :)

I believe that 4 sticks of ram will stress your board and IMC in your processor more than 2 sticks of ram hence why think raising the volts will help.

Your board will be fine with a .1v increase on CPU, NB and RAM. Do this and see if it posts stable, if it does then work back lowering the voltages until you can narrow it down a little. :)
 
I always use just two sticks cause as others have said, 4 sticks on some boards stress it so much that it will not run stock speeds without some overvoltage
 
Ill play with it some more today and add a little extra voltage to the CPU north bridge after work today. Hopefully that will fix my issues for good.
 
give it max 1.45V if yours is a C3 revision, 1.5V if its a C2.

mines C3 and at 1.45V :D
 
Ha well that seems kinda high. But anything to get this rig working I'm down for and ill be overclocking anyways
 
BrooksyX said:
Ha well that seems kinda high. But anything to get this rig working I'm down for and ill be overclocking anyways
Click to expand...

watch load temps if keeping the volts that high though. 55c on CPU. not any higher.
 
Everything seems to be working great so far now. The ram just didnt seem to like being run at/under 1300 or 1.5 v.
 
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