cancel
Showing results for 
Search instead for 
Did you mean: 

Is my memory compatible?

Xarick
Level 7
http://www.kingston.com/dataSheets/KVR1333D3N9K2_8G.pdf

I have that one. The motherboard is asus crosshair v formula, now updated to bios 1605.

Manual says:


This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less (Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1 Megabyte/MB.)


Does it mean my memory isn't compatible? How could I tell from the specs?

Regardless, I've been using them for some months and didn't have errors with them, but then again, I was never able to use all 8192 MB. Best I could get was 8176 MB. Some settings in the BIOS changes it to 7384 MB useable for Windows and 7424 MB during POST.

Can you help me configure it? I appreciate.
609 Views
9 REPLIES 9

chrsplmr
Level 18
Welcome to ROG.

How about the other specs .. ie .. cpu ? gpu ? psu ? cooling ? os (win7 pro64 or ultimate?) ?
(just because it is not supported doesnt mean it wont run .. btw.)
Im wondering why you would want to ..
I would also follow Raja's instructions of read to read=5 ... and set to T2. (memory settings)

memory is not the place to 'save' money .. no offense.
best of luck.c.

Howdy C.
Saw your post and had to say howdy.Hope all is well.Take care,
Happy ROG_n
Doug

Hi. Sorry, I'm not particularly savy on these things, just wanted a system that could work well.

The cpu is AMD FX-8150 with water cooler custom made by Asetek, gpu is ASUS EAH6850 DC/2DIS/1GD5/V2, the psu is Antec High Current Gamer 620, os is Windows 7 Ultimate 64 bit with Service Pack 1.

I'm not overclocking anything, everything is running at stock settings.

Here's some screenshots from BIOS, I saved them on a skydrive folder:
http://sdrv.ms/RVrl2A

Read to Read seems to be 5 already, and command rate is T2

Xarick
Level 7
Well, anything else I could try?

chrsplmr
Level 18
Xarick ... worry not .. so just the number is bothering you ??
The system is either reserving that amount of memory Or .. have you run memtest ?

If there are no errors or bsod and apps dont crash .. everything You wish to run, runs
flawlessly .. then ?

A simple test of memory and system that I like is to load a few apps .. some browsers ..
maybe a game ... and put the system to sleep ..
when you wake it .. any issues ??? no ? then ... there are no issues with the memory ..
that is where 'sleep' lives ..

It is a sys reserve somewhere .. c.

Xarick
Level 7
Thanks. There's no such problems like BSODs or errors at all. But there are or were a few issues with the system returning from sleep. Haven't tried to sleep and resume the system with this new BIOS yet.

EDIT: Actually, there are some errors in Windows Virtual PC with Windows XP Mode. I can't allocate any memory value higher than 512MB to the client OS. It will keep on restarting the Virtual Machine on and on non-stop. No matter if the host OS sleeps or not.

Have an update. And some questions afterwards...

I found what was causing the motherboard to detect only 8176 MB total installed memory. It was the Core C6 setting. It takes 16 MB of RAM for itself. I was finally able to see 8192 MB with that setting disabled, but then, turbo mode doesn't go over 3900 MHz on my FX-8150. It used to go up to 4200 MHz.

There's also HPC mode, but I don't know what it does, it takes some RAM as well.

And finally there's a setting inside Northbridge / Memory configuration, Memory Hole Remaping. This one takes a LOT of RAM when disabled, about 512 MB if not mistaked.


Questions:

1 - What does HPC mode do? And what is Memory Hole Remaping for? Is it normal to have it enabled?

2 - What is IOMMU? I know it's related to virtual hardware, but that's all I really know. I have Windows Virtual PC running Windows XP Mode on it, what setting I put there in the BIOS? It doesn't let me set anything other than 512 MB on the client OS without causing an infinite loop trying to start the virtual machine. Host OS is Windows 7 Ultimate 64-bit with SP1. Client OS is Windows XP Mode with SP3.


Please answer, don't let the topic get buried.

The simple answer is Yes that ram will work fine. If you want something really fast select something rated at 1866 or higher even all the number means is that the manufacturer guarantees your ram to work at the labeled speed I.E. 1333 1600 1866 and so on. If you are new to overclocking than don't start with overclocking the ram as it can be rather confusing and there is contradictory info on the internet.

Xarick
Level 7
Thank you, but I'm not overclocking.

I want the system to be stock stable on Windows Virtual PC, which currently it isn't. I don't know why it isn't, because it works fine for the Host OS, but not on Client OS. There's a lot of HDD seeking inside Windows XP Mode which kinda slows it down, but at least it's tolerable. However, the major problem for me is that I need to assign more than 512MB on the Virtual PC and it just doesn't work.