LENOVO ThinkBook 15 G4 IAP 21DJ0047MJ Laptop – Mineral Grey
>> INTEL Core i7-1255U Processor (12M Cache, up to 4.7GHz) | 8GB Soldered DDR4-3200MHz RAM – Up to 40GB (8GB Soldered + 32GB SO-DIMM) DDR4-3200MHz RAM | 512GB PCIe 3.0x4 NVMe 2242 M.2 SSD – Up to 2 drives – 2 x M.2 SSD | Integrated INTEL Iris Xe Graphics functions as UHD Graphics | 15.6” FHD (1920x1080) IPS 300-nits Anti-Glare 45% NTSC display | W11 Pro | 1 Year LENOVO Premier Onsite Support Warranty | Includes: 1 x ThinkPad Carry Bag
----> From RM3,640 to RM3,770 ↑

Hi how much to upgrade to 16G RAM? do you have recommended high performance model at budget range below 4K?