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z620 startup too slow

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Microsoft Windows 10 (64-bit)

hello every one,

i have Z620 with samsung SSD 480 Gb, the bios version is 3.86 and the boot block date is 2013.


the problem is that it takes too long to be start up. it takes around 40 sec. to start up the bios boot and then around 20 to boot the windows.


and i think it is not normal, so what is the problem or how to fix it ?!


thank you.

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Hi Ali_A_Hassan,


Taking about 1 minute to boot to the Windows log on for a HP Z620 is normal. Your system boot up time is deterrmined to a significant degree by your hardware configuration. Systems with large amounts of additional hardware, such as RAM modules, multiple CPU's, GPU's, HDD's and other PCI cards can take significantly longer to boot up, particularly if you also use HDD RAID arrays. Think of PCI cards and HDD's as mini PC's, they have their own firmware which needs to load before they can communicate with the Z620 motherboard.


HP Z620 - Liquid Cooled E5-1680v2 @4.7GHz / 64GB Hynix PC3-14900R 1866MHz / GTX1080Ti FE 11GB / Quadro P2000 5GB / Samsung 256GB PCIe M.2 256GB AHCI / Passmark 9.0 Rating = 7147 / CPU 17461 / 2D 1019 / 3D 14464 / Mem 3153 / Disk 15451 / Single Threaded 2551
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One specific behavior I've noticed--both on the z620 and the z420--is that if you populate 2 DIMMs/channel using quad-ranked DIMMS it adds significantly to the boot time. For what it's worth, that boot delay is accompanied by a period of max RPM on the cooling fans and a black screen but the system eventually does boot and the fans spin down.
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