I recently bought an Acer Aspire 5610Z with a whopping 512mb of RAM that runs Vista. I got such a great deal on it and knew that the first thing I'd be doing was upgrading the RAM. Technically, the RAM is upgradeable to 4GB.\r\n\r\nFirst I bought 2 sticks of Patriot 2GB DDR2 PC5300 667 MHz SO-DIMM memory to install. I checked each stick in my computer and each stick worked alone, and each memory slot seemed to work. However, when both sticks were installed, the computer would not boot. \r\n\r\nI thought perhaps the brand of RAM was somehow not compatible so I exchanged these for a 4GB kit made by OCZ technology. -\- similar specs as the Patriot except PC5400. Still didn't work....\r\n\r\nI called the Acer guys and had them stumped. They said it was possible that it was because of Vista, but I would doubt it since the laptop wouldn't even boot into the BIOS. All I got was a black screen...\r\n\r\nHas anyone had an issue like this, or does anyone know of a decent resolution?