I ordered a 2.8 iMac with 1GB of ram and the 500GB HD on Friday of last week and received it yesterday. Also, I purchased 4GB of ram (2 x 2GB sticks) from good old OWC like many of you have recommended. This is where the nightmare began. First off, I was a bit peeved that my computer only came in with a Leopard Drop-in with Tiger installed as the current OS. I mean, shouldn't the packers be installing this for us? Sheesh, I should get paid for having to do their dirty work...anyways, that's a tirade I will leave to a different thread. So here is the nightmare part. I take off the ram cage on the bottom of the imac, pop out the hynex 1GB stick that Apple had in there by using the black tab. Simple. Easy. This will be a breeze, I thought. No. I go to put in the first 2GB module and it is not a smooth fit. It takes a lot of pushing, nudging, teetering, and squeezing to get it fit in there. I compared the fit of the hynex, which was so smooth to put in (just fit perfect with little effort), and my 2GB module which was a lot less fitting. There was just something off, but alas I moved on to the second 2GB stick and started nudging it into the empty slot and let me tell you it was hell, I could not for the life of me get it in all the way...It wouldn't "click" like the other stick (even though that was a pain to get in too). I was pushing with all my strength and wobbling it back and forth until i felt it had a decent fit. My thumbs hurt so bad from all the pushing, but I sucked it up, closed the cage, booted the Mac and thats when I went bat**** insane. I was presented with the Tiger Setup screens on boot and made my way to the section where you Select a wireless network to attach to. I selected mine, entered the password and press continue. Then this beachball started spinning and the message "Configuring your computer..." just sat there for at least 5 minutes before the screen went a shade of black and this black dialog box with 5 different languages saying "Restart your computer" appeareed. I was pissed! Freezing on setup? Did I get a freezing Imac and have to endure this crap before I even get started on the desktop? I had a suspicion though that it was that blasted ram stick that couldn't fit right and still had my thumbs on fire. I tried restarting just to see if it was a random occurrence, but it kept freezing during the Tiger Setup at random places. So I ended up restarting the mac while holding 'D' down and running the hardware test. Sure enough it failed after a minute into the test with a message of "4MEM/40000..." which i assumed was a corrupt memory module or at least an improperly seated one. SO I took that stick of ram out and restarted. I was able to get through all the screens and set up Tiger fine. I even was able to get Leopard installed with no problem in about 30 minutes. But I was still upset, my first Imac experience didn't go as smoothly as I hoped. But, I blame this more on OWC than anything else. Their ram is just shaped a little too thick or something for the Imacs. Fitting in the stock ram for the mac is just a breeze compared to what OWC gave me. I have a suspicion that the RAM is so cheap for a reason and it really isn't tailored to fit perfectly in the new IMacs like the stock Apple hynex memory is. Anyways, I already requested an RMA to get this ram replaced but I can't help but feel a little sad inside because I didn't get a smooth ride. I have been lurking these forums for months now and this is my first post and I would just like to say that I feel for everyone that has had issues with ram or even the Imac freezing. It's not your fault and it does happen. My Imac hasn't frozen since I took out the RAM, so hopefully I have a good one. Anyways, that was my story, it was a nightmare espcially since I was up till about 3 am fiddling with that stupid RAM. Feel free to ask me questions about the setup.