谢谢楼上各位的回复,汇报如下 - 回复:Incompatibility of PC4200 and PC5300 Noteboo
1) swicthing slots makes no difference
2) Toshiba A135-S2276 2GB max
3) no "timings" thing found in BIOS
Additional info by CPU-Z below shows 2 x 1G found, while system reported 1G
Control Panel -> System shows 1G
CPU-Z