I own a Dell Studio 1535 laptop with Windows 7 64bit which came with 3 GB RAM (2 GB + 1 GB DDR2 modules). Recently I changed the memory to Kingston Value 4GB (2x2GB) DDR2 800 SO-DIMM memory. The laptop seemed to work fine, the memory was available to the system and the on-board Dell-supplied diagnostic tool reported no errors.
However, since the memory upgrade I've been getting BSODs related to memory (PAGE_FAULT_IN_NONPAGED_AREA, BAD_POOL_HEADER, IRQL_NOT_LESS_OR_EQUAL, BAD_POOL_CALLER). These aren't frequent, I get one in about 3 days of normal usage but it's still very annoying. Before the upgrade I wasn't getting any BSODs at all.
I thought the memory I bought is faulty and thus run Memtest for 16 hours (about 15 passes) and it showed no errors. This keeps me puzzled - should I return the memory as faulty or is the problem something else I am overlooking? What could possibly be wrong except for the memory?
Dell Studio 1535 Processor: Intel Mobile Core2Duo T5750 @ 2.00 GHz Mainboard: Dell 0M263C (Intel GM965 chipset), bios Dell version A05 Original memory: 3 GB 332.5 MHz, 5-5-5-15 DDR2 1.8V Dual Channel New memory: 4GB Kingston DDR2 (also shows 332.5 MHz and 5-5-5-15 in CPU-Z)