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I’d then use wide washers on either side of the tray, a standoff above the upper washer, a screw through everything and a locking nut at the back of the tray.
The original Z800 comes with a power supply engineered by HP to fit the genuine HP case.
The power supply is so important to the overall stability of the system that I don’t skimp on it but, as usual, I’m determined to get the best deal I can.
After much research I bought a Super Flower Leadex 1000W (80 gold) supply from Overclockers UK on one of their ‘this week only’ deals for £110.
We ran Redhat Enterprise Linux on them and they were, and still are, extremely fast linux servers that could operate as physical boxes in our production environment or virtuals in development. And it was very expensive, much too expensive to justify forking out for one. You can now pick up a brand new replacement motherboard for an HP Z800 on ebay for £100. Excitement quickly turned into a daunting realisation that I may have bitten off more than I could chew. It will not fit into any ‘normal’ PC case, not even an EATX tower case. There’s a separate power connector for the memory banks with a proprietary connector. Clearly this is a server motherboard adapted only slightly to fit into HP’s proprietary case with HP’s proprietary power supply and cooling system.
The mounting screws will not mate with any of the ATX holes in a motherboard tray. Buyers of the Z800 certainly received their money’s worth compared to an anonymous box filled with generic parts.
The HP power supply distributes the main 12V output across 8 different rails, each with a maximum delivery of 18A but with a combined output ceiling of 70A for the 850W unit and 92.5A for the 1110W option.
I have no way of knowing how much will actually be drawn by each rail so it’s safest for me to buy a single rail unit with a nice high overall amperage.