Ultra 4 + 4 gig

I realise this thread hasn't been used in awhile, but I want to let you know I have just successfully upgraded the memory on my australian Ultra 4+ thanks to the various posts on this thread.

I have updated using the Corsair 4GB, 200-Pin SODIMM, DDR2 PC2-6400 (800MHz) - (VS4GSDS800D2) Value Select module (about AUD$120), and after 3 passes of the memory test I had no erros.

We have 3 computers with HDTV tuners that record directly to the NAS, over a Gigabit network, using Windows Media Cente. TV is then wached at each of these machines or the Xbox, via Windows Media Centre.

The improvement in performance after the memory upgrade is marked. Everything happens a lot quicker and the streaming is a lot more reliable.

Thankyou all for being a fountain of information. :D :D :D :D

I've also done this 4GB module upgrade on an Ultra 4 with success.
I used the Patriot PSD24G6672S: http://www.frys.com/product/5904954 ($65 USD)

Will soon be repeating the process for mine. Initially used the 2GB version of this same module: http://www.crucial.com/uk/store/partspe ... 51264AC667

Crucial (Micron) memory has always been flawless for me in every application I've ever used it. Using Corsair performance RAM in my Desktop, but Crucial is always a top contender for me too.

You're gonna replace your 2GB module for a 4GB one ? Isn't 2GB quite enough ? I encountered disk swap before, but since i've got 2GB, the NAS never used the swap memory.

Yes. I'm running a lot of add-ons and do a lot of large transfers. My Swap file has between 1GB and 2GB usage atm. The CPU cycles aren't high judging by iStat, but the memory usage is. Less than 100MB free a lot of the time.

Have you seen the bottom of this article?: http://www.readynas.com/kb/faq/hardware/is_there_a_way_i_can_verify_if_my_memory_is_good

Not having much memory free doesn't necessarily mean you need more as the NAS deliberately uses as much of the memory as possible.

Yup. It's reducing the usage of the swap-file that is what motivates me at this time. Also, some other issues that I know are related to memory usage (not stability related) that are prompting me to do the upgrade. Smoothing out of performance is the goal here. When i originally put the 2GB stick in, i didn't have many add-ons running concurrently. That's no longer the case. I Know CIFS will cache up most of the memory for transfers. Like I say, the lack of free memory isn't what's bothering me, it's the ever-increasing swapfile size.

Hello!

I'm about to get an Ultra 4 and I'm thinking about getting 4GB memory to it. I have a few questions:

1) Is there only one memory slot? Can I use 2*2GB?

2) Does anyone know how much the performance depends on the frequency of the memory. That is, 800MHz vs 667MHz. Should I get one with 800MHz? The 800MHz DDR2 SO-DIMM 4GB seem to be so expensive...

3) Does anyone know the statistics of compatible memories? Could I just get the cheapest memory there is and be fairly certain that it will work, or is there a big percentage of memories who are not supported by the Ultra 4?

4) Has anyone tried PSD24G8002S ?

Only (1) slot, so just one 4GB if you want that much memory.

Speed probably won't make a lot of different with this CPU.

What about the number of chips on each side of the memory? In "Memory test ReadyNAS Ultra 2", I read that people suspected that the reason some memories don't work is because they have totally 16 chips, while those who work have 8.

In this case the memories are DDR2, but does anyone know if this problem applies to the Ultra 4 as well? Has anyone tried memories with 16 chips? The one I just got has 16, but if this is a known problem, then I better return it rather than wasting my money on it. I have the PSD24G8002S. I saw that you, Chirpa, have the PSD24G6672S, so it should be the same but with different frequencies. Could you check how many chips it has?

EDIT: I ran a memory test 12 hours with the PSD24G8002S without any errors and now it's up and running!