Proper 6 to 8 pin gpu connector for a HP z820

[Studio107]

Need a proper 6 to 8 pin cable for the HP z820, It has two 6 pin gpu cables and I need a 8 pin for the Tesla p100 gpu.

I feel the HP N1G35AA 6-pin to 8-pin adapter is not suitable for powering a Tesla P100 GPU due to its power limitations. is there a dual adapter? or another option. 

[NonSequitur777]

@Studio107,

Welcome to our HP community forum!

Look no further than this purchase option: Amazon.com: Cable Matters 2-Pack 6 Pin to 8 Pin PCIe Adapter Power Cable - 4 Inches : Electronics:

Kind Regards,

NonSequitur777

[Studio107]

Ok and one cable should be enough for the Tesla p100 gpu?

[SDH · Accepted solution]

Studio107,

This issue has been discussed numerous times in the forum here and please take the time to read both pages of this link. If you look at the power supply label in HP workstations their supplemental PCIe cables have an amperage rating of 18A each, not the 16A rating described below... but this post gives you the big picture. 18A x 12VDC = 216W + 75W from the PCIe slot = 291W from your Z820 feeding into your 250W max TDP card:

Solved: Does my HP Z240 400W PSU support the official hp 6-pins to 8... - HP Support Community - 853...

Based on the nVidia specs, attached, your answer is "yes". It is worth knowing how high the engineering is for the HP workstation's graphics power supply pathways, well above ATX standards. The special HP 6-to-8 adapters are not generic. They were designed by the same HP engineers... they do know what they're doing. I'd personally recommend you get a genuine version made by HP. I guess it comes down to your tolerance of risk vs reward.

Risk: Solved: HP Z620 +980Ti = melty PCIe power cables - HP Support Community - 8033287

[NonSequitur777]

@Studio107,

Yes, one of the 6-pin to 8-pin PCIe power adapter cables will suffice for your Tesla P100 graphics card. Given that your 6-pin output is 12V x 18A = 216-watt, and your PCIe x16 slot can provide up to 75-watt, you are A-OK to go to power a 250-watt TDP graphics card.

What @SDH is referring to is the assumption that HP's 6-pin to 8-pin power cable adapter is heavier duty and better engineered than a 'generic' brand.

That may or may not be true, but on all my desktop upgrades (with mostly generic power adapters), I never had a (catastrophic thermal) issue yet.

Just FYI.

Kind Regards,

NonSequitur777

[NonSequitur777]

@Studio107,

Here is an eBay heavy-duty 6-pin to 8-pin PCIe power adapter purchase option, claimed to have a whopping maximum 324-watt power ceiling: 🔥 HP 721859-001 GPU Power Adapter Female 6 Pin To Male 8 Pin Power Cable | eBay -not that you would necessarily need it, but it may make everybody happy.

Kind Regards,

NonSequitur777

[DGroves]

i've been in this field for quite a few years and made my living this way

in that time i've seen quite a few poorly made products from adapters to power supplies to cases motherboards you name it and i've most likely seen it in a crappy product knock off

in regards to video card 6-8 pin adapters i've personally seen ones that have poorly made plastic shells that can easily catch file and burn (quality ones are file resistant plastic which costs more) and the copper wires in the plastic coverings are not copper but something else and/or have less strands (because copper costs money!)

and the actual connector in the plastic shell is some unknown metal

(not the beryllium copper a quality adapter has)

and due to the poor metal quality in no name adapters they rapidly fatigue and lose the ability to securely mate, this causes a loose connection that can generate heat and cause a fire

as to power supplies,..............do you really think that no name 35.00 700/800 watt power supply sold on ebay and elsewhere can actually provide anywhere near 700 watts of clean ripple free highly regulated power?

as "SDH" says get the HP oem adapter or even a oem one made by dell, lenovo over a no name retail one