Upgrading HP EliteDesk 800 G5 SFF Part II

[NonSequitur777]

Dear Forum,

Ran the PassMark V11.0 build 1003 Performance Test:

Overall PassMark V11.0 build 1003 Rating: 10,298 - 97th percentile

CPU Mark: 17,921 - 75th percentile

2D Mark: 1,006 - 88th percentile

3D Mark: 26,618 - 99th percentile

Memory Mark: 3,681 - 95th percentile

Disk Mark: 33,816 - 98th percentile

PassMark Performance Test download: https://www.passmark.com/downloads/petst.exe.

Kind Regards,

NonSequitur777

[NonSequitur777]

@Friddle,

As discussed in Solved: Re: Sff motherboard new gen support - Page 3 - HP Support Community - 8820824, removed the 250-watt power supply (p/n: L08417-004) and installed the 400-watt power supply (p/n: 942332-001).  My desktop powered on without any issues, even though the 400-watt PSU's "P2" 7-pin power connector's wire color coding was a little different, as it lacked the purple wire: red, white, black, green, grey, purple empty, black.  The 400-watt PSU's 8-pin PCIe power cable is not needed, and tucked away.

The reason why I swapped power supplies -even though the current config doesn't need it, is because I am planning to install an i9-9900KS, which has a whopping 127-watt TDP, devouring 32 additional watts compared with the i9-9900KF (TDP: 95-watt) currently installed.

An additional 150-watt under the proverbial hood would allow -or so my thinking goes, to provide sufficient power to feed Intel's top 9th gen i9 processor.  My RTX 3080 12GB graphics card is powered with a synced 850-watt external fully modular power supply, but the "internal components" of my HP EliteDesk 800 G5 SFF are powered through the onboard power supply.

Ran the UserBenchMark test again, and this rig continues to run super smooth on all cylinders -that would be 8, of course (Cores) or 16 (Threads), depending how you choose to approach this: https://www.userbenchmark.com/UserRun/63526830.

Kind Regards,

NonSequitur777

[NonSequitur777]

Dear Forum,

Continue researching i9-9900KS compatibility with the HP EliteDesk 800 G5 SFF, which has the Intel Q370 chipset:

Intel® Q370 Chipset:

"The Q370 chipset is part of Intel's business-oriented chipset lineup and is designed for stability, manageability, and security features. It's generally used in business-class systems and is not commonly paired with enthusiast or high-performance processors like the i9-9900KS."

Kind Regards,

NonSequitur777

[NonSequitur777]

Hey, Ho / Ho Hey:

🥁 🥁 🥁

Kind Regards,

NonSequitur777

[NonSequitur777]

Dear Forum,

Doggonit, a couple of hours ago today whilst watching a YouTube video, this desktop abruptly crashed.  Actually, not crashed, but like the power switch was turned off without warning.  Since this PC is connected to a large UPS, that couldn't have happened.  Anyway, I ascertained that the UPS was indeed A-OK, as well as the secondary synced power supply.

I swapped the 400-watt power supply back to the 250-watt power supply, and voilà, this rig powered on just fine.

Not clear why the 400-watt PSU failed -it couldn't have been an excessive power draw, as the 8-pin PCIe power cable wasn't used, and the i9-9900KS hasn't been installed yet.

Also, a close inspection of the aforementioned power supply didn't provide any clues either: observed no smoke, hot spots or burn marks, discolored, bulging or leaky electronic components, or little e-gremlins trying to scamper off.

Informed the eBay Seller and requested a replacement power supply.  If they boondoggle (...) me, eBay will refund me one way or another.

Kind Regards,

NonSequitur777

[NonSequitur777]

Dear Forum,

To give praise where praise is due: Seller agreed to have me return the defective unit for a full refund and also provided a free USPS priority mail shipping label. Will think about where to go from here, perhaps I will purchase the 500-watt SFF power supply (p/n: L77487-003) instead.

Kind Regards,

NonSequitur777

[DGroves]

most HP power supplies for workstations and many business models do not use single rail power supplies where any unused wattage is available on any output cable

they use multirail type supplies and as such the wattage of each subsection is fixed so if the cpu wattage is 100 watts and the GPU wattage is 100 watts but you are only using 50 watts the remaining 50 watts is not available to the cpu power subsection

[NonSequitur777]

@DGroves,

You brought up an excellent point.  That's why I mentioned switching over to the 500-watt power supply which does provide more juice per power rail compared to the 250-watt power supply: 18 Amps vs. 16 Amps, which is 12.5% more power, which translates into 24 additional watts each per rail:

To reminisce: the failed 400-watt (p/n: 942332-001) just like the 250-watt power supply also provided 16 Amps per rail, and turned out indeed not to be a power (wattage) improvement per rail:

Kind Regards,

NonSequitur777

[Friddle]

Hello,

A question about your 800 g5:

How fast is your memory clock speed?

From what I’ve heard you cannot enable XMP on HP PCs to unlock the systems full memory clock speed. My 2666MHz RAM is currently running at 2115MHz or somewhere around that.

I’m wondering if it’s possible to reach the full 2666MHz that the RAM, motherboard and CPU is rated for. And weather it would be much of a performance gain/loss. Can XMP be enabled on an EliteDesk 800 g5?

many thanks, Friddle

[NonSequitur777]

@Friddle,

The fastest any RAM will ever run on an HP EliteDesk 800 G5 SFF with an i9-9900KF is 2666 MHz (see: Intel® Core™ i9-9900KF Processor) because, as you pointed out, there is no XMP access.  Trust me, I tried every trick known to man to use the full capabilities of an "unlocked" processor -but I digress.

Here is my (dual rank/channel) RAM speed:

Link: HP EliteDesk 800 G5 SFF Performance Results - UserBenchmark.

So, yes, it is certainly possible to reach 2666 MHz with your i9-9900K.  If you can't, it's because your RAM is likely stuck at its default or "SPD" (serial presence detect) speed.

You don't perchance have Corsair or G.SKILL RAM installed?  -That would explain the 2133 MHz RAM speed...

Kind Regards,

NonSequitur777