i thought about that as soon as i posted it lol! mybad.. test it with the Leopard Installer Disc via the Hardware test thing maybe. oh but it wont let you boot... bugger... got a PC laptop to test it on?
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iMac won't boot with 4GB but will with 3GBbut I think I can have 4GB...
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i thought about that as soon as i posted it lol! mybad.. test it with the Leopard Installer Disc via the Hardware test thing maybe. oh but it wont let you boot... bugger... got a PC laptop to test it on?
I don't understand why one stick would work if it's "incompatible."
I guess the next thing to try would be to get those sticks and test them out. However, I believe I have the mid-2007 model. There is a review on that newegg site that says this:
So should I just avoid this? Or try it out? I guess I could buy this same memory at Best Buy and then return it if there's a problem....
because its been known not to work every single time. sure for some machines it may work but for others it may not. for something to be compatible it must be working 100% of the time.
But the one stick does work every single time. If I had boot up problems sometimes with one stick, I would understand. I guess I'll try the other RAM, or just stick with 3GB....?
There are a variety of reasons. If I could find your chip on Kingston's site (it is unlisted for some reason) I could probably determine the issue. In all likelihood, it's something to do with its specifications (e.g., timing) that is causing the problem. When you use mismatched pairs you can get the "bad" chip to behave like the "good" chip, thus resulting in functionality. However, if you put in two "bad" chips, they don't work. Note that "bad" simply refers to some specification of the chip and not that it's defective.
Some type of ram are not compatible. There are threads similar to this such as:
https://forums.macrumors.com/archive/index.php/t-545762.html
In that thread, Consultant, it appears as though that person had one stick that was clearly defective because only one of his would work with the other 1GB stick. Both of mine work with the 1GB stick. Thoughts?
@Cave Manthat seems to make the most sense to me. This is the same product, correct?: http://www.bestbuy.com/site/olspage...oduct&id=1216424484563#tabbed-customerreviews
I'd rather test the RAM from Best Buy and then return it if it works (or doesn't work) and then buy it from Newegg because I hear that you can't return memory to Newegg.
I'll let you know what happens when I try those sticks. Sigh...
Yeah, those would work, but why not buy from Other World Computing? Four gigs is less than $50 and they come with a life-time warranty. I buy nearly all my RAM from them and only had one bad chip (which they replaced).
Damn, Had this exact experience! Any way to fix it?
Damn, I had the same problem. Bought the 800MHz Ram for a 4GB upgrade and the macbook wouldn't boot. So I took it back and bought the 667MHz and it still wouldn't boot. So I played around and discovered that it would boot with either new RAM module as long as I used one of the old 1GB modules.
So anybody figure this out? Oh, I was buying mine at BestBuy as well, it is the same stuff as the original poster!!!
Thanks.
Damn, I had the same problem. Bought the 800MHz Ram for a 4GB upgrade and the macbook wouldn't boot. So I took it back and bought the 667MHz and it still wouldn't boot. So I played around and discovered that it would boot with either new RAM module as long as I used one of the old 1GB modules.
So anybody figure this out? Oh, I was buying mine at BestBuy as well, it is the same stuff as the original poster!!!
Thanks.
You've already figured it out. Your RAM is incompatible with your Mac. Return it and buy the correct RAM.
Unfortunately Caveman, those other memory sticks did NOT work. I feel as though there has to be something I'm missing. Oh well. I'm currently running on 3 GB and it looks like I'm going to have to live with it.
Unfortunately Caveman, those other memory sticks did NOT work. I feel as though there has to be something I'm missing. Oh well. I'm currently running on 3 GB and it looks like I'm going to have to live with it.
Your MacBook must only take 667 mHz RAM sticks. Do you have the specs on your chips? I have 667 in my MBP.
Edit: OK, dug out my package. My MBP had KTA-MB667k2/4g (2x2 gb sticks) in it. These are 667 mhz. (One's been pulled in lieu of a 4 gb + 2 gb setup.)
I have an Intel desktop. I know you said MacBook, I just wanted to make sure that we're speaking the same language
Does that still mean that I have to run 667?
I have an Intel desktop. I know you said MacBook, I just wanted to make sure that we're speaking the same language
Right - I was thinking about the other thread with the MacBook.
It sounds as though you have a mid-2007 iMac, not a 2008 iMac? The former takes 667 mhz RAM, while the later takes 800 mhz RAM. If so, when you put an 800 mhz chip in with a 667 mhz chip, the 800 mhz chip runs at 667, which is why it works. You put two 800 mhz chips in and it doesn't work because the bus cannot support them. Your Kingston chips were 667 mhz, so there must have been a timing issue that prevented them from working.