crucial
samsung
nanya
kingston kvr
mushkin

all working as reported.

It seems that you guys have not encountered any issues with RAM. I've read a number of reviews on Newegg and unibody MacBook users has had some issues both with Apple and Value RAM.

I'm not sure if the issue is from the MacBooks being picky on what RAM they run on or there is a large number of defective RAM.

Guys...any of u happen to know when the kingston hyper x ddr2 sodimm came out? how many months after ddr2 went mainstream? and any predictions when can we see performance ddr3 sodimms?

thanks mate .. but just dont know what is the source for the machine becoming "hang" sometimes when i am doing multiple tasking ..

It depends what is that 'hang'. If its a total screen freeze with no way to recover other than to force OFF the computer then it could be RAM due to incompatibility or a faulty module. Guess you would have to keep changing modules until you find one that works.

if often get beachball? likely bcuz of what? hdd?

thanks again david,

i guess it was a totally screen freeze ( as the picture i attached in this post ), again, may I know how to change the modules? and where is the module located?

thanks





Attached thumbnail(s)

this picture i kena twice

I want to ask, my macbook pro now have 2x2gb ram. if i remove 1 stick of ram ( meaning only got 1 x 2 gb ram inside) , the macbook wont boot up. i wanna downgrade ram but with 1 stick of ram the macbook cant bootup issit?

y cant boot up?

Most like it is HDD. Check your software update records or whether you have installed the EFI v1.7 firmware. We have a thread discussing this. Apparently the update causes the HDD to not respond. Assuming you're using one of the new MBPs.

If you're using the new MBP, the modules are located underneath of the laptop and at the center. You will need to remove all 10 screws (+, Philips) before lifting the bottom aluminum panel. The modules are on top of each other. Current Intel Macs run on dual channel memory controllers so each slot represents one of the 2 channels.

Diagnosing memory module problems are a little troublesome in that you need to try all sorts of configurations. It would help if you have spare DDR3 modules lying around. You can first swap locations for the current modules. See if it helps. As a general rule, follow the following guidelines:

1. Ensure you populate each of the slots to take advantage of dual channel memory addressing (performance related).
2. Ensure you populate each of the slots with the same type of RAM (timing, bus speed, etc) - preferably from the same manufacturer.
3. Ensure you populate each of the slots with the same capacity of RAM (optional).

You can always use different capacity (for example 1GB+2GB) provided number 2 is satisfied. In this case, the first 1GB from each module will be addressed in dual channel while the remaining 1GB will be addressed in single channel. You will suffer some performance degradation but it shouldn't affect stability.

It would be wise to also consider that kernel panics may not necessarily be a memory problem. It could be one of your software applications or drivers. Also, I don't mean to insult but just double check that DDR3 is installed cause DDR2 is awfully similar.

I think it should work. This is not like Rambus RDRAM where you need a dummy module to be inserted. Its not a serial thing. You can run off independent channels. Are you sure the slot is not damaged?

Or am I missing something? I'm new to DDR3 but I expect them to be the same as DDR2.

Thanks David,

I am using Macbook 13" 2.4 GHz (2008), I still have the original 2G RAM module with me. Maybe I should try replacing them back, means downgrade from 4G to 2G, to see whether it get back the stability or not. Hope this will help. ^^

how to kena?

OK the original unibody 13" isn't so different from the newer MBPs. Their location is the same. You should check out ifixit.com and check their teardowns for procedures. I think the original unibody doesn't require removing the bottom panel right? Check your manual.

the original unibody still need to open the back panel in order to install RAM. no need for HDD though

thanks... already looked at ifixit.com

hope this will work ... ^^

how is the ddr3 performance on mbp mushkin or kingston value ram better??
thinking of upgrading within this week:)

just came across with this, hope it help you :
http://forums.mushkin.com/phpbb2/viewtopic.php?f=4&t=13235
http://www.newegg.com/Product/Product.aspx...N82E16820146878

This post has been edited by dr.is: Oct 27 2009, 11:38 PM

i was considering mushkin vs kingston as well. from the link dr.is had posted, the 'non-apple model' mushkin was reported to have some compatibility issues with a mac. how about the kingston?

i was more towards mushkin for two bad reasons. 1) mushkin packaging looks better, and 2) i've always bought kingston rams...never had an issue but im just bored staying with the brand haha

find ram that is cheap and confirmed working.. that is all u need.