Anonwatch,
While HP has provided an SLI connector pver the years, the only part number in or near that the Quadro 5000 time frame (2011) I could find is FZ559AA / T77002 HF:
| Condition: | | Brand: | HP |
| Chipset/GPU Manufacturer: | NVIDIA | Memory Size: | 4GB |
| MPN: | FZ559AA | Compatible Port/Slot: | PCI Express x16 |
| Memory Type: | GDDR3 | UPC: | 0884420435174 |
https://www.ebay.com/itm/HP-NVIDIA-SLI-BRIDGE-T77002-HF-Pulled-from-working-computer-/133093512009?h...
> But I think the above predates the 5000. The above works with 4GB of GDDR3 while the Quadro 5000 is 2.5GB of GDDR5.
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The Quadro 5000 from 2011, having an average Passmark 3D score of 2855, can easily be surpassed by Kepler or Maxwell. A very good value for example is the K4200 4GB, PCIe 2.0, 256-bit and with 1344 CUDA cores, - about $140 and Passmark = 4469. If the applications are very demanding, the Quadro P2000 5GB is very capable: PCIe 3.0, 160-bit, 1024 CUDA, and Passmark = 7268. The P2000 is a modern GPU that would be useful for a longer period. For a system of the z820's potential, it seems that a Q 5000 may represent a potential performance limitation using current applications. There is also the question of WS applications that can not use multiple GPU's. If practical, consider the advantages of consolidating the GPU into a single, more modern card.
Sorry I couldn't be of more help.
BambiBoomZ
