BernieAEGT.
The HP Turbo Drive Quad Pro provides a board in a fan-cooled enclosure that allows mounting from one to four M.2 drives. As each M.2 drive uses PCIe x4, the Turbo Drive Quad Pro requires a PCIe x16 slot to support all four drives. That is, when you open a single Quad Pro, there are connection /mounting points to add from one to four of the tiny M.2 drives.
The Turbo Quad Pro is a single height card and given the slot spacing on the z840 there should be no problem having the Turbo Drive Quad Pro and a Quadro 6000 which is a double height card.
It's a very clever idea, and guaranteed to send an avalanche of GB/s. However, in a system with two PCIe x 16 slots, it does limit the GPU to one. It's worth taking a moment to consider system balance: CPU to Memory to GPU to Disk proportionality. This balance depends on for what is the system used.
The disk performance with four M.2's- (Samsung SM951 NVMe ?) would be astoundingly good, but make the system heavily disk oriented. if you are using huge datasets. analytically, e.g., Matlab, Mathematica - fantastic. If the system is for visualization such as 3D CAD, rednering or video editing / processing and limited to a single GPU, perhaps consider a Quadro M4000 with 8GB memory as compared to the Quadro 6000's 6GB. On Passmark benchmarks the average 3D score of the Quadro 6000 is 3443 having 448 CUDA cores and for the Quadro 4000- 6493 with 1664 CUDA cores. The Quadro 6000 also uses 225W to the M4000's 120W.
If the system is compute oriented: scientific, analytic/ simulation, the alternative might be to have a single 512GB M.2 drive using a PCIe x4 slot, containing the OS /Programs and active projects, then have an M4000 plus a Tesla co-processor. which requires a x16 double height slot and then have a very fast SATA connected SSD for libraries to keep up with the M.2. - Or perhaps 2X M4000 to have 3,328 CUDA cores which = > 448.
I have a z620 with a Z Turbo Drive 256GB (AHCI) which is so fast, nothing else on the system can really keep up with it. The start up time, program opening, and file saving of the z620 in comparison to the office z420 (E5-1660 v2 /32GB /Quadro K4200 / Intel 730 480GB) before it had a Samsung SM951 added is about the same: the Z Turbo Drive is almost always waiting on the CPU. The file transfers are much better from the z420 Z Turbo to Intel 730- amazing, but still reduced and when writing to an SATAIII mechanical HD, which I do as backup, the Z Turbo has to run at the HD (WD BLack 1TB) read /write speeds- the weakest link principal.
Cheers,
BambiBoomZ
HP z620 (2012) (Rev 3) 2X Xeon E5-2690 (8-core @ 2.9 / 3.8GHz) / 64GB DDR3-1600 ECC reg) / Quadro K2200 (4GB) / HP Z Turbo Drive (256GB) + Seagate Constellation ES.3 1TB / 800W > Windows 7 Professional 64-bit > HP 2711x (27" 1980 X 1080)
[ Passmark System Rating= 5675 / CPU= 22625 / 2D= 815 / 3D = 3580 / Mem = 2522 / Disk = 12640 ] 9.25.16
[Cinebench R15: OpenGL= 115.78 fps / CPU = 2199 cb / Single core 131 cb / MP Ratio 16.84x