+RealBlackStuff says
+the X200T is compatible with DDR3-1066 (PC3-8500) and DDR3-1333 (PC3-10600).
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+My ThinkPad X200T (type 7449-43U) came with 2x2GB DDR3-1066 SO-DIMM (PC3-8500) from Elpida as the OEM provided.
+It's a Core2 Duo SL9600 model and Intel's datasheet doesn't show any maximum memory for the processor.
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+Rumor is the X200T can take 2x4GB DDR3-1066 (PC3-8500) or possibly DDR3-1333 (PC3-10600).
+I ordered a Corsair 2x4GB DDR3-1066 (PC3-8500) set and will post memtest86 results when I get it.
+It's possible the memory won't work.
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