Z Turbo drive G2

[SDH]

Not in a Z800. I have in other HP workstations. Noctua fans tend to run slow to start with and then when the motherboard adds in its intended PWM "braking" effect they run too slow in my experience. They have the standard pinout order that HP also uses so if you take away the pin 4 PWM control signals they'll run at full 12VDC speed. The motherboard wants to see the pin 3 "sense" signal to know the fan is there and to help with its cooling strategy.

Noctua also makes little in-line fan speed controllers with a different value resistor on the pin 2 DC line depending on the Noctua version chosen. They come in 3-wire non-PWM and 4-wire PWM versions. The Z600 workstations came with a Northbridge heatsink and small attached fan which was way too fast in its stock form, so I always put one of the 4-wire ULNA adapters on that, and that has worked well for years now. Use google to find ultra low noise adapter noctua. They have more than the ULNA and LNA (which is NA-RC7). The 3-wire version of that is the NA-SRC10. ULNA is NA-RC12 and NA-SRC12.

The HP fan plug ends are a bit different, wire order is the same, I've modified the plugs also and even have used old HP plug ends on Noctua fans... don't mess up the wire ordering if you do that. There are even "13" and "14" versions of the adapters with different Ohm resistor values. The Noctua ones are accurate; other brands have not been. You can even go on eBay and find a lower amperage HP 92x92x25mm PWM fan if you wish to lower noise. The lowest noise fan is one that nicely does not rotate at all. Another rabbit hole to go down...

[Yannis6]

Thank you very much.

The second NVMe on Z800 is a reality. Not with a second Z turbo G2 but with a ICY BOX Pcie extension card and an NVMe Samsunf 970Evo plus.

Same speeds with the initial NVMe i have allready installed. The pcie card is of very high quallity.

[SDH]

They seem to make several different ones. Note the 3 capacitors on the ZTD G1 and G2... those can be important for maintaining data integrity during writing, and if a PCIe M.2 interface card does not have capacitors that is a sign of under-engineering in my mind.

I'm sticking with the HP ZTD G2 "Q1-Out" approach. Those HP cards are reasonably priced recycled off eBay and I've heard of and experienced issues with other brand cards. There even is a good guy on eBay who sells the "unlocked" ZTD G2 with Q1 already out. I think he must have a nano-desoldering station.

For others... PCIe Gen4 and Gen5 slots are a reality but for them to run at full speed those need a M.2 stick with its NVMe-controller engineered for that, plus a workstation that has those slots, plus an interface PCIe card that can work at full speed with the bandwidth that technology provides. Only testing would tell me if the ZTD G2 card has that, but I don't have a HP G5 workstation to test with. The new Zx G5 workstations have both Gen4 and at least 1 Gen5 slots.

[DGroves]

in regards to the IDE vs raid+AHCI settings

IDE is the bottom rung speedwise, it lacks the enhancements (such as extended commands, pre fetch of anticipated data, caching) to name just some of the enhancements of the extended "AHCI" command set due to this it's "extremely slow" and is kept simply because its compatible with all IDE/SATA drives ever made on all obsolete and new hardware

the RAID+AHCI setting simply insures that windows will load BOTH DRIVER SETS during the OS install and select the correct set, disabling the unused driver. this allows you to at any time switch from a single drive config to a Raid configuration without having to reload the OS or try modifying the OS registry and manually load the raid driver before powering down and configuring the raid array hoping the manual raid driver changes were correct, if not the OS will not load and blue screen. Again Raid+AHCI is the correct bios setting for ANY SYSTEM not just the HP workstations

i no longer have any z800's but i'm fairly sure the unmodded turbo z card worked in it but it's been so long that i may be imagining this or i may have modded the z800 motherboard itself when i wanted to use the HP card in it

FYI, what HP did on the "z" 4/6/820/840 models was take a unused pci-e pin and use it to detect the reset signal from the HP  turbo z card and then disable the cards reset signal

the HP card was designed to have a constant reset signal  on one of the cards pci-e contacts and if used in a non HP approved system this reset line causes the card to constantly reset itself over and over preventing the boot sequence from proceeding and removing the "q1 transistor" disables the cards reset circuit

as i previously stated the Z800 will not boot from any current nvme drive due to it not having a UEFI enabled bios and missing nvme bios boot code.  a nvme drive can be used on these systems as a non booting drive using any current OS that includes a nvme driver such as win 8 and higher (win 7 x64 can also do this if you modify the Os installer to include the required nvme drivers)