U2
Samsung K4G80325FB-HC28
RAM
BGA
Unified + standby memory
About this component
The eight GDDR5 chips around the APU form the unified game memory. The extra 1 GB of DDR3 belongs to the south bridge and lets the OS move background apps out of GDDR5, freeing about 512 MB more for games (5.5 GB total). The seed groups two separate memory pools in one entry. Part variants: GDDR5: 8 x Samsung K4G80325FB-HC28 (1 GB each) on CUH-7000 per iFixit. DDR3: Samsung K4B4G0846E-BYK0 (512 MB each, two chips for 1 GB). Other GDDR5/DDR3 vendors may appear on CUH-71xx/72xx.
What it does on this board
8GB GDDR5 main memory and 1GB DDR3 for background OS tasks.
Pinout & readings
No pinout or reference readings yet — these show what each pin does and what a healthy part should measure.