Why cant my motherboard support 8gb ram

[batadoum]

Hello i have this motherboard ASUSTeK Computer INC. P7H55-M LE (LGA1156) and it says that it can support up to 8gb ram so i bought this ram Kingston 8GB HyperX Fury Red 1600MHz CL10 and when i add it my pc restarts on starting windows icon..Anyone has a clue?

this is my cpu Intel Core i3 540 @ 3.07GHz
Clarkdale 32nm Technology

 

[Mr Kagouris]

Bad RAM stick or unrelated issue. Make sure you didn't accidentally switch your SATA from IDE to AHCI in the BIOS (or vice versa). Your motherboard should sure as hell support 8GB. Oh and make sure you set the RAM to run at 1333MHz as that's the most your motherboard supports.

 

[batadoum]

Hmm can u tell me how it can be a bad RAM stick? its brand new...

 

[batadoum]

These are my bios settings:

IMC type:Clarkdale

DRAM frequency DDR3-1333MHz

Memory remap feature : Enabled

PCI MMIO Allocation : 4GB to 3584MB

Initiate Graphic adapter : PEG/PCI

These are my other option on Initiate graphic adapter:

IGD
IGD+PEG (DUAL)
PCI/IGD
PCI/PEG
PEG/IGD
PEG/PCI

 

[sizzling]

On the Asus website it says your mobo only support these speeds "2 x DIMM, Max. 8 GB, DDR3 1333/1066"

You have 1600mhz, now I'd expect it to downclock the ram but it might be it just refuses to use it

 

[batadoum]

My previous ram had 9-9-9-24 timings while this ram has 10-10-10-30 has that anything to do?

 

[CountMike]

Is that one stick of RAM or 2 x4GB ?

 

[batadoum]

Its a single one...1x 8gb..

I went to the shop and i bought a crucial 4gb ddr3 1600 udimm 1.5v cl11 and its not working either like wtf..

 

[CountMike]

MB has two memory slots and it supports only 8GB altogether so 8GB sticks are out. With that 4GB stick, did you reset BIOS ?

 

[batadoum]

You mean to remove the battery and add it in again and then add the new ram?

 

[CountMike]

Yes and also possible to MB has 2 or 3 pins on BM marked CLR_Cmos if just battery removal doesn't do the trick. Make sure power is off completely and push start button for few seconds.

 

[batadoum]

I tried with battery removal nothing...it wont even open the pc starts and the screen is black ...

Im not getting what u mean by saying marked clr_smos im not that good with pcs

 

[CountMike]

Manual for it : https://www.asus.com/Motherboards/P7H55M_LE/HelpDesk_Manual/ Chapter 1.6, "CLRTC" marked pins. Take cap off pins 1 and 2, Place on pins 2 and 3 for 15 seconds, replace on 1 and 2.

 

[batadoum]

aw boy i dont have that cap anymore i remember removing it couple of years ago...

 

[CountMike]

You MUST have one, that may be your main problem !!!!

 

[batadoum]

i remember having it but i removed cause i thought it was a protector for those strings or something..

any idea where can i get another?

 

[CountMike]

That's not only a cap, it has metal inside to short 2 pins electrically. See if you can find one in a computer shop or service. They can take one off from a dead MB. I keep hundreds of them.
Did you get rid of any other ones like that ?

 

[batadoum]

There was only 1 ... i have this motherboard since 2010 and i removed it for no reason...i bought 2x rams since yestarday 100 euro and nothing im really dissapointed..

 

[Mr Kagouris]

Again, the PC crashing at the Windows startup icon with any RAM definitely sounds like you switched SATA mode from IDE to AHCI or from AHCI to IDE (I know because I accidentally did the same and had the same thing happen to me). Find your SATA mode in the BIOS and switch it to the other option (if it's IDE switch to AHCI, if it's AHCI switch it to IDE). If that doesn't work try restoring BIOS defaults.

 

[batadoum]

Well i tried to change from IDE to AHCI but my pc wont boot it stuck on windows loading icon...


I tried to run my pc on safe mode with the 4gb ram on and i get a classpnp error anyone knows what that means?

 

[Mr Kagouris]

Put the 8GB stick back in and reset BIOS to default then reconfigure it.

 

[CountMike]

That BIOS doesn't support 8GB stick and it's not going to set and keep BIOS/CMOS without that cap on pins 1 & 2.

 

[Mr Kagouris]

That BIOS doesn't support 8GB stick and it's not going to set and keep BIOS/CMOS without that cap on pins 1 & 2.

Huh, really? Weird, I have an H55 motherboard (really cheap one too) and it's fine with an 8GB stick. Guess OP should see if he can return the RAM and buy 2x4GB sticks.

But I don't get it, shouldn't having an incompatible RAM configuration make the motherboard simply fail POST? Also if the problem is the single 8GB stick why did his PC also have a problem with a 4GB stick?

 

[CountMike]

That BIOS doesn't support 8GB stick and it's not going to set and keep BIOS/CMOS without that cap on pins 1 & 2.

Huh, really? Weird, I have an H55 motherboard (really cheap one too) and it's fine with an 8GB stick. Guess OP should see if he can return the RAM and buy 2x4GB sticks.

But I don't get it, shouldn't having an incompatible RAM configuration make the motherboard simply fail POST? Also if the problem is the single 8GB stick why did his PC also have a problem with a 4GB stick?

Without that cap on pins 1 & 2 BIOS can't function properly or at very least CMOS will not keep settings.