motherboard msi b85-g43 gaming. won't power on after updating ram

mickyh

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Jul 26, 2014
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hi all,

first time posting here, anyway pc problem which is really confusing me. i got some ram from ebay, G skill ripjaw z to go into a pc with the msi b85-g43 gaming motherboard (6 weeks old). checked compatibility table and it is compatible. this was a perfectly working pc before installing the ram, once i installed the ram, this is what happened.

the pc booted okay, but wouldn't run games and kept giving errors. i instantly thought faulty ram. so i tried one stick in and it didn't work, i tried the other stick in and that worked. just to rule out ram slot i tried it in dimm 4, no ram sticks worked, tried in dimm 3 the suspected bad ram works in that, but the good ram didn't, so i put the suspected bad ram in dimm 3 and good ram in dimm 2, pc booted and ran fine with benchmark, but then started giving errors and the benchmark crashed, i shutdown the pc, and turned it on to do memory test, computer wouldn't turn on. i removed the presumed faulty ram stick, pc still wouldn't turn on. removed both ram sticks motherboard turns on and off then wait 10 seconds and it will turn back on again. i put old ram back in which was working fine, and computer wouldn't turn on. i left the computer off for 30 minutes and turned it back on and it turned on. but now when ever i shutdown the computer and then turn it back on, my fans spin for a second and the power light blinks but then that is it, if i turn computer off at wall and back on after 10 seconds after a few goes it will come back on eventually after 4 to 6 goes.

could the gskill ram have burned something out in the motherboard, or done some damage to the memory controller?

when installing and uninstalling the ram an antistatic wristband was used at all times and pc was turned off at the wall and power button was pressed, then the pc was left for 2 to 3 minutes before removing ram.

things i have tried. reseating the cpu. reseating gfx, reseating all cables.

full spec of this machine.

mb - msi b85-g43 gaming
ram - 4gb transend 1333 9-9-9-24 (which is why i was upgrading it)
cpu - i5 4670k (was the old cpu from my machine, built this for my gf.)
gfx - msi 760 tf
psu - 550 80+ modular powercool pc-550 auba-m

 

mickyh

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Jul 26, 2014
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4,510


Hi thanks for replying. I tried a bios reset twice and it still does te same thing. Tried bios reset once when new ram was in and then again when old ram got put back in.
 

Alin Prema

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Jan 11, 2014
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10,710
I forgot to mention that if you have 4 DIMMs (RAM slots) and they are for dual-channel RAM, you need to pot the sticks in some specific order and you'll find info and instructions about this in the motherboard manual. For example, on my motherboard, if i have only one RAM stick, i need to put it on first DIMM (the closest to the CPU) in order to work. I bet in your case you need to put them on the first and the third DIMMs in order to be properly mounted. What frequency the new RAM sticks have? You checked RAM compatibility just by the name of those new G Skills? There are G Skill Ripjaw Z with 1600MHz which are mentioned in your motherboard compatibility list, and there are G Skill Ripjaw Z@2133MHz which aren't.
 

mickyh

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Jul 26, 2014
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4,510


These were the ripjaw z 1600. Even if they were the 2133 I still think they will have worked because anything over 1600 would be overclock in an xmp profile. (My corsair vengeance 2133mhz worked perfectly in that board at 1600mhz or at least did until I put ripjaws in but had to put them back in the other pc) With regards to the msi boards the first dimms are 2:4 then if using 4 sticks, the 1:3 would also be used. It was like that on my last few machines aswell.

I'm wondering if it's a faulty motherboard. It works fine when it turns on. There is no overclock on this board. It is only when it gets shut down. It has trouble powering on for a bit. If left off it will come back on eventually.

I am still waiting for amazon to send me a new board but they haven't as of yet just wondering if it could be anything else. I don't think it's power supply because it has no problem powering on my other machine which is power hungry.

Thanks for your help so far. If you can think of anything I may have missed it would help