Here is why LPDDR4x-4266 RAM seems considerably faster when coupled with Intel Tiger Lake-U CPUs compared to equivalent AMD Renoir APUs - NotebookCheck.net News
G.Skill smashes 4GHz memory barrier with new 4,266MHz kit | KitGuru
VENGEANCE® RGB PRO 16GB (2 x 8GB) DDR4 DRAM 4266MHz C19 Memory Kit — Black
G.Skill Trident Z Royal Series DDR4 kit 64 GB: 2 x 32 GB DIMM 288-pin 4266 MHz / – ASA College: Florida
G.SKILL 32GB (4 x 8GB) TridentZ RGB Series DDR4 PC4-34100 4266MHz Desktop Memory Model F4-4266C17Q-32GTZR at Amazon.com
G.SKILL's memory kit: 32GB DDR4 at 4266MHz! by Jose Antunes - ProVideo Coalition
G.SKILL Releases Fastest 32GB (4x8GB) Trident Z RGB Memory Kit at DDR4- 4266MHz - G.SKILL International Enterprise Co., Ltd.
TOUGHRAM RGB MemoryDDR4 4266MHz 16G (8G x 2)
G.SKILL F4-4266C19D-16GTZKW Trident Z Series 16 GB (8 GB x 2) DDR4 4266 MHz Dual Channel Memory Kit - Black/White at Amazon.com
G.SKILL F4-4266C19D-16GTZKW Trident Z Series 16 GB (8 GB x 2) DDR4 4266 MHz Dual Channel Memory Kit - Black/White at Amazon.com
Hynix CJR 4266 MHz CL-18-22-22-28 (more in comments) : r/overclocking
G.Skill Launches Low Latency, High Clocks Trident Z RGB DDR4 Memory
HyperX Releases Predator DDR4 Memory at in 4266 MHz and 4600 MHz
G.Skill Trident Z 16GB (2 x 8GB) DDR4 4266 MHz, CL19 - memory, Silver/White | Memory | Components | Multitronic