The AMD LPDDR5 setup for laptops is likely a scam.
The AMD LPDDR5 setup for laptops is likely a scam.
TL;DR: Some Ryzen laptops with LPDDR5 RAM operate much slower than advertised, causing lag and poor gaming performance. Even though your desktop runs smoothly, your new Zephyrus G14 shows significantly higher memory latency and stuttering when using low settings. Benchmarks reveal the RAM clocks are much lower than claimed, and under load the speed drops further. Other reviews confirm similar issues with comparable models.
LPDDR5 performance is consistent across Intel, AMD, and Apple devices. These modules typically exhibit greater latency but can achieve higher clock speeds to compensate. It’s not a downclocking situation; HWInfo may display incorrect data. The information shown is the base clock for one channel, not MT, and it gets distorted when multiple channels are involved. Your RAM operates at 6400MT/s under full load as expected, slowing down only when idle. As mentioned earlier, LPDDR memory generally has poorer latency and timing compared to standard DDR. It’s worth noting that LPDDR is favored by iGPUs for its higher bandwidth, which benefits users who depend on integrated graphics.
LPDDR5 named as DDR indicates it's a double data rate memory. At 800MHz it delivers 1600MT/s or 1600Mbps, employing a unique clocking method where the clock is separated from the data strobe signal. The clock can operate at one-quarter the speed of the data strobe, though this introduces some processing delays due to synchronization. To maximize power savings, AMD appears to have skipped implementing WCK, whereas Intel's version maintains WCK continuously, leading to greater power consumption.