DDR3 RAM for Late 2009 iMac

[Nguyen Duc Hieu]

For being sure we have Apple, makes no sense to discuss if we just want to be sure.

I encourage you to try it out yourself.
The cost is not much and there is no risk in trying RAM.
I did.

 

[Eugen Mezei]

I encourage you to try it out yourself.

I prefer to ask instead of reinventing the wheel.
I guess we can agree, nobody forced you to answer, especially not having an answer. (And not have understood the questio in the first place.)

The cost is not much and there is no risk in trying RAM.

I will if it is no other way. Until than I recommend you figure out what the purpose of forums is.

I did.

Great, I applaud that. You are a true hero.
Would be even more impressive if you yourself would know what you did. Seems you don't. I asked about low voltage memory, you go on and on about frequency. Was my question so difficult for you to understand?

Btw, exactly in this situation a risk of trying RAM exist. For the low voltage RAM.

 

[simie]

Im having the exact problem now when I tried to upgrade from 2*2GB to 4*4GB RAMs. Did you find any solution?

When I install 2*4GB (8GB total) rams alone - BEEP infinitely
When I install 3*4GB (12GB total) rams alone - BEEP infinitely
When I install 4*4GB (16GB total) rams alone - BEEP infinitely

But.....
When I install 2*4GB + 1*2GB(old one which came with the iMac) (10GB total) - Boot up fine
When I install 3*4GB + 1*2GB(old one which came with the iMac) (14GB total) - Boot up fine

Im unable to max the memory to 16GB because of this.

And here I am wondering how do I get 16GB to work?

I have a 2009 iMac 27" iCore 5 and I have just changed 2x2gb 1333Mhz Sodimms for 2x4gb 1333Mhz Sodimms and it boots and works perfectly. The reason for changing the modules was because the performance was pathetic. What a difference this extra ram made.

 

[Nguyen Duc Hieu]

I prefer to ask instead of reinventing the wheel.

What do you have at the moment?
iMac + DDR3L RAM => Just need a screw driver to try.
iMac only => an old 2GB DDR3L stick is just 2-3$.
No iMac, no RAM => Why bother?

And what do you expect of gaining in performance? The RAM frequency is capped at 1333MHz anyway.