I had 2gb of memory in the computer and i wanted to upgrade to 8gb but when i try to boot it wont boot but if I take 1 stick of memory out and go with 6gb of memory it will boot. Any help would be greatly appreciated with this, I am at a complete lost

Have you run memtest?

 

Tapatalk from CM10.1 Kindle

 

 

I had 2gb of memory in the computer and i wanted to upgrade to 8gb but when i try to boot it wont boot but if I take 1 stick of memory out and go with 6gb of memory it will boot. Any help would be greatly appreciated with this, I am at a complete lost

 

Make sure that you have the memory sticks paired up in the right slots.  You will probably have to read the manual to be sure that you can properly identify how the memory are colored coded. 

What's the make/model of your motherboard?

... and the make/model of the RAM modules you're using?

 

If you're running a board with unbuffered RAM, you may have a bus loading issue when using 4 double-side memory modules (which most 2GB modules are).

 

There are a variety of ways you may be able to resolve this:

(a)  Add a cycle to each of the latency settings to allow the signals more time to settle (with that much load, the waveforms are severely degraded);

(b)  Run with a slower memory clock;

©  Slightly increase the RAM voltage, which will help compensate for the deformed signaling waveform  (but do NOT go more than ~ 10% above the specifications).

 

The BEST solution is to only use 2 modules, even if the board supports more.    Depending on your board, you may be able to get 8GB with a pair of 4GB modules instead of 4 2GB modules ... and it will run more more reliably.

 

Thanks I took all the memory i bought back to the store I think i ran into compatiblity issues, so i just installed the 2gb back in a will buy another stick just like it because i know it is compatible unraid with 4gb of ram should be good right

Unraid by itself will run fine on 4gb - plugins will change that.

 

Sent via a phone. Sorry for any typos.

 

4GB is plenty for UnRAID and a few basic plugins.

 

What's the make/model of your motherboard?    If it supports 4GB modules, you could install 2 4GB modules and get 8GB of RAM without significant loading issues.

 

Unraid by itself will run fine on 4gb - plugins will change that.

Actually, unRAID itself runs fine on 512 Meg of RAM. 

 

Joe L.

I ran with 4 for a couple years, and when I upgraded my PC (which previously had identical memory), I put all 8Gb in unRAID. Not that I needed it, but "why not". Doesn't it just use this for more cache when copying over?  Figured I could copy over an entire DVD ISO without waiting for drives to spin up and parity to run, not sure I ever quite got that . 

 

Anyway, running 8GB fine with 4 sticks, never had a glitch from the first boot.  I was confident in board/RAM compatibility though.

Running with 4 modules installed on an unbuffered board significantly degrades the signaling waveform; but as long as the modules are running at the correct voltage; aren't being "pushed"; and are relatively low load modules they can work okay.

 

One absolute:  Running with two modules will absolutely be MORE reliable.

 

But if you're not having issues, you're probably fine.

 

This degradation in signaling is why most server boards use buffered modules => one load/modules is a LOT better than one load/chip (e.g. 16-32 loads/module) !!  There's a good explanation of this in Part 10 here:  http://www.xlrq.com/stacks/corsair/153707/index.html

 

Unfortunately, most desktop motherboards don't support buffered RAM.  A few, however, support ECC modules, which at least provides a mechanism to correct single bit errors when they occur -- this can help offset most errors.