PINE64   ›   Pinebook Pro   ›   Pinebook Pro Hardware and Accessories   ›   Memory clock speed: 800MHz vs 1600MHz? (NM, RK3399 won't run >800MHz DDR)

Thread Closed 
Memory clock speed: 800MHz vs 1600MHz? (NM, RK3399 won't run >800MHz DDR)
tllim
Founder
*****
Moderators
Joined: Dec 2015
Posts: 4,299

Reputation: 287
#4
06-26-2020, 06:14 PM
(06-24-2020, 11:02 AM)Syonyk Wrote: It appears the RK3399 is limited to an 800MHz memory channel on DDR4.  It can do 933 on DDR3, and it might be worth messing with uboot to see if it can run 933 on DDR4, but there's apparently a hard check that doesn't allow it right now.  It might be worth experimenting with.

Should able to operate on 933MHz (PC-1866) LPDDR4. On the RockPro64 board, has been tested up to 1067MHz (PC-2133) LPDDR4 but no plan to release this driver.

Both ROckPro64 and Pinebook Pro PCB memory access simulation has been tested up to PC-2400.

Attached is the 933MHz LPDDR4 driver.


Attached Files
.zip   rk3399_ddr_933MHz_v1.11.zip (Size: 21.27 KB / Downloads: 431)
  Website
Thread Closed 


Messages In This Thread
RE: Memory clock speed: 800MHz vs 1600MHz? (NM, RK3399 won't run >800MHz DDR) - by tllim - 06-26-2020, 06:14 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  Revisiting RK3399 LPDDR speeds Syonyk 1 1,465 01-02-2022, 10:03 AM
Last Post: Syonyk
  RK3399 - big.LITTLE core choice optimization lucserre 3 5,811 06-29-2020, 11:12 AM
Last Post: xmixahlx
  PBP Displayed Clock-Calendar Drops Hour Setting On Reboot. jcj52436999 15 18,180 01-23-2020, 04:39 PM
Last Post: MIchael
  Rockchip RK3399 PCIe lanes only 2.5GTb/s? Arwen 2 6,091 08-25-2019, 05:51 AM
Last Post: Arwen

Forum Jump:


Users browsing this thread: 1 Guest(s)