MINISFORUM’s US listing specifies 48GB of LPDDR5-6400 for the T5 Max-388, paired in the listed US configuration with a 1TB SSD. VideoCardz reported that documentation for the IFA 2026 presentation listed LPDDR5X-8000. In one Cyberpunk 2077 comparison, ETA PRIME reported 49 FPS for a 6400 MT/s system and 55 FPS for an 8000 MT/s system, with the game running at 1440p Ultra and FSR disabled.
Treat 6400 MT/s as the listed memory rate and 49 FPS as one result from a specific Cyberpunk 2077 test, not a forecast for every game.
What MINISFORUM lists for the T5 Max-388
The MINISFORUM US product listing specifies 48GB of LPDDR5-6400. Its listed US configuration pairs that memory with a 1TB SSD. MINISFORUM’s EU listing gives the same memory specification.
MT/s means million transfers per second. VideoCardz reported that IFA 2026 presentation documentation listed LPDDR5X-8000, a different rate and memory-type label from the US listing. The two stated rates differ by 1,600 MT/s: 6,400 MT/s is 20% below 8,000 MT/s.
Using the same 256-bit memory interface as an assumption, VideoCardz calculated theoretical bandwidth of 204.8 GB/s at 6,400 MT/s and 256 GB/s at 8,000 MT/s. Those figures describe a theoretical rate of data transfer, not measured gaming performance.
What one Cyberpunk 2077 comparison found
ETA PRIME reported this comparison in Cyberpunk 2077 at 1440p Ultra with FSR disabled:
| System memory rate | Average frame rate |
| 8,000 MT/s | 55 FPS |
| 6,400 MT/s | 49 FPS |
The gap was 6 FPS in that test. ETA PRIME also reported a 3DMark Time Spy graphics score of 10,710 for the 6400 MT/s system and described it as about 2.9% below the faster-memory system. Both results belong to the reviewer’s comparison; they describe those tests, rather than a fixed performance difference across games.
Shared memory in ETA PRIME’s SteamOS test
The T5 Max-388 pairs the Ryzen AI Max+ 388 with integrated Radeon 8060S graphics, which use system memory. In a separate SteamOS setup, ETA PRIME reported that 21GB of the 48GB unified memory was allocated to VRAM. That leaves a nominal 27GB outside the allocation before operating-system and other system use; it is not an amount of guaranteed application-available memory.
ETA PRIME tested eight games at 1440p in that setup and concluded that 6400 MT/s did not heavily bottleneck the games in the demonstration. The conclusion applies to that reviewer’s test setup and game set.
The 48GB memory is described as non-upgradable
VideoCardz describes the 48GB memory as soldered and non-upgradable. In the teardown of an early T5 Max sample, ETA PRIME showed memory chips soldered to the board. For a buyer, that makes the listed 48GB capacity a choice to weigh before purchase.
