I recently purchased a Dell Inspiron 7586 to replace a poorly functioning notebook. The Dell came with 1 stick of DDR4-2666 RAM, so I thought I'd move the dual channel 2400MHz I had in my old laptop. I thought the bus speed would drop 266Mhz, but I'd gain dual channel operation. Instead, when I look in HWINFO64 I see that my RAM's theoretical speed is 1200MHz, but the actual speed is 665 Mhz (1333MHz effective, I guess.)
At first, I thought it might be because I was undervolting with Throttlestop, but the problem persisted after I disabled Throttlestop and rebooted. Anybody know why the laptop is underclocking the RAM modules?
Computer: DELL Inspiron 7586 CPU: Intel Core i7-8565U (Whiskey Lake-U, W0) 2000 MHz (20.00x100.0) @ 4089 MHz (41.00x99.8) Motherboard: DELL 032K59 BIOS: 1.6.0, 07/19/2019 Chipset: Intel Cannon Lake-U PCH-LP Premium Memory: 16384 MBytes @ 665 MHz, 10-10-10-28 - 8192 MB PC19200 DDR4 SDRAM - SK Hynix HMA81GS6AFR8N-UH - 8192 MB PC19200 DDR4 SDRAM - SK Hynix HMA81GS6AFR8N-UH Graphics: Intel UHD Graphics 620 (Whiskey Lake-U GT2) [DELL] Intel UHD Graphics 620, 1024 MB Graphics: NVIDIA GeForce MX150 (GP108) [DELL] NVIDIA GeForce MX150, 2048 MB GDDR5 SDRAM Drive: KBG20ZMS512G NVMe TOSHIBA 512GB, 500.1 GB, NVMe Sound: Intel Cannon Lake-LP - cAVS (Audio, Voice, Speech) [D0] Network: Intel Wireless-AC 9560 OS: Microsoft Windows 10 Home (x64) Build 17763.973 (1809/RS5)