I would say the first one, as you would then allocate 1 GB of RAM, and you don't want everything else on your computer quitting.
ຂ້ອຍຢາກເວົ້າອັນ ທໍາ ອິດ, ຄືກັບທີ່ເຈົ້າຈະຈັດສັນ RAM 1 GB, ແລະເຈົ້າກໍ່ບໍ່ຕ້ອງການຫຍັງອີກໃນຄອມພິວເຕີ້ຂອງເຈົ້າ.