Which Slot is best to install this USB 3.2 Gen 2 PCIe Card? HP EliteDesk 800 G4 SFF

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2[H]4U
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I have an older HP EliteDesk 800 G4 (i7-8700 32GB DDR4 512GB M.2 2x 12TB spinners LG BU40N) that I wanted to add more type C ports to so I bought This card that also supports USB PD (which is one of the reasons I picked this particular card)

Anyway what slot should I put this card into?

I posted the page from the manual that lists the ports and connectors on the motherboard of my PC

I am thinking of installing it in Item #1 which is the white 16X wide slot that is only electrically 4X Or will it work in the actual 16x slot which is Item #4? So what does the [H]ardForum think about my plan?

Thanks

PS:
If I have to install it in item #1 I will have to rearrange some of my cards though as I currently have my WiFi antennas (Yes antennas only the actual M.2 card is mounted on the motherboard in the Item #10 M.2 WLAN 2230 slot) I did that as when I bought this PC it came without WiFi/BT and I already had some of those RP-SMA to MHF4 cables from a previous project and the actual HP solution was way over-priced for two small chip style antennas!



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either, unless you need 4 for a gpu
OK Thank You!
I put it in the 4X slot and it works just fine!
So does the USB PD (I tested it with a PD 12V trigger cable and I got 12.09 VDC no load as tested with my multimeter)
However I did need to buy an adapter for the power supply connection.

This PC uses a weird power supply that only outputs 12VDC!
The SATA power connections are supplied VIA a header on the motherboard, I do wonder how much power the motherboard can actually supply to the drives and my USB card?
I have the optical drive (Slim-line drive so 5VDC Only) 1x 12TB spinner and the USB card (I had 2 in the case but took one out as to preserve it my data as ALL of it occupies only 7.3TB, but I did copy all of it to the drive I removed so if one fails I would not loose much as of today LoL)
 
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This PC uses a weird power supply that only outputs 12VDC!
The SATA power connections are supplied VIA a header on the motherboard, I do wonder how much power the motherboard can actually supply to the drives and my USB card?

Unless your system is old enough to pre-date the standard that's called ATX 12VO (12 Volt Only).

Maybe a half dozen years ago the big OEMs started doing it as proprietary designs because it was cheaper to hit power efficiency standards by eliminating the higher resistive losses from sending 3.3/5V power to the mobo than to squeeze another percent lower losses out of the PSU itself. (Also because the cost of the large number of 3.3/5V wires and grounds in the big ATX connector that had been excessive since all major components on the mobo moved to 12V 15-20 years ago actually was enough to matter when you were making millions of systems). Intel prodded the ATX group into standardizing it and has been unsuccessfully trying to get makers of components for the systems we use to switch over as well. So far they've been unable to overcome the chicken and egg problems from forcing people to buy new PSUs instead of reusing existing ones and low manufacturing volumes meaning poorer selections and higher prices for ATX 12VO systems vs conventional ATX.
 
And how old would that have to be?
This PC is from 2018
2005 or so for the 6-pin you need I think. My GeForce 7900GTX had one, my previous 6800GT used a 4-pin molex for extra power. There were a couple generations where higher end cards had a couple 6-pin connectors before the 8-pin showed up. It's still common to see OEM power supplies that lack PCI-e power cables of course, and small PSUs (think like 300W) tend to lack PCI-e power cables.

Spec on a PCI-e x16 slot is 75W. A 6-pin cable is officially good for 75W and an 8-pin 150W, though the way most PSUs wire them with 6+2 connectors the 6-pin part can carry 150W.

Using an SATA to 6-pin PCI-e adapter with that USB card is a little sketchy, but should be fine as long as you don't charge too much stuff at high speed at once. SATA power plugs are rated at 54W max, so with the PCI-e slot you've got 129W. Of course I'd also wonder how much the mainboard can really handle off one SATA power connection. 50W drives haven't been a thing for a long time. The card can output up to 45W on 2 ports and 30W on the other two, so 150W. I'd also wonder how much the PSU can handle.
 
Your system predates it. The standard was published in 2019.
So does the standard call for a set type of plug? as each of these computers use proprietary connectors

A standard that all 12VO power supplies must follow EX: like the 20/24 Pin ATX connectors?

I used to have a Dell Precision T1700 that was from 2014 or so and that also had a 12VDC single output power supply.

2005 or so for the 6-pin you need I think. My GeForce 7900GTX had one, my previous 6800GT used a 4-pin molex for extra power. There were a couple generations where higher end cards had a couple 6-pin connectors before the 8-pin showed up. It's still common to see OEM power supplies that lack PCI-e power cables of course, and small PSUs (think like 300W) tend to lack PCI-e power cables.

Spec on a PCI-e x16 slot is 75W. A 6-pin cable is officially good for 75W and an 8-pin 150W, though the way most PSUs wire them with 6+2 connectors the 6-pin part can carry 150W.

Using an SATA to 6-pin PCI-e adapter with that USB card is a little sketchy, but should be fine as long as you don't charge too much stuff at high speed at once. SATA power plugs are rated at 54W max, so with the PCI-e slot you've got 129W. Of course I'd also wonder how much the mainboard can really handle off one SATA power connection. 50W drives haven't been a thing for a long time. The card can output up to 45W on 2 ports and 30W on the other two, so 150W. I'd also wonder how much the PSU can handle.
The HP EliteDesk 800 G4 SFF has a 250W Power Supply

I'm only going to use it to charge my cell phone (Google Pixel 6 Pro) and my tablet (MaxWest Astro 10R that was an ACP $10 copay tablet however the 4G will not work anymore. :() and occasionally my 12VDC @ 2A (Using my 12VDC trigger cable) the label maker only uses 2A while printing (around 200MA idle) and that takes 5-10 seconds depending on the length of the label

The cell phone and the tablet (The tablet uses USB-C and came with a 10W/2A 5VDC charger) might occasionally get used at the same time but never with the label maker.

So I think and hope I'm in the clear LoL!

I knew that the SATA plugs could not handle much power however I did not know the limit was 54W

Thank You all for helping me
 
So does the standard call for a set type of plug? as each of these computers use proprietary connectors

A standard that all 12VO power supplies must follow EX: like the 20/24 Pin ATX connectors?

I used to have a Dell Precision T1700 that was from 2014 or so and that also had a 12VDC single output power supply.

A standard pinout for the PSU-mobo connector and mobo to sata cables were the main things standardized vs the proprietary solutions the various OEMs had developed on their own.

Standby power being 12V instead of 5V might also have been part of it, just because it's thematic the "12 volt only" name, but probably didn't make a big enough difference to have been a universal change. I could be wrong though, mostly because for DIYers it's something of an impediment in preventing an old PSU from running a new mobo just with a passive plug adapter. It'd need a small DC-DC voltage converter to step up the standby power. I don't know of that's ever been made or not. Running a 12VO PSU with an old mobo could be done with existing hardware in the form of pico-PSU boards used by some SFF builders that plug into the ATX connector and make 3,3/5V power for the rest of the system from an external 12V brick.


I knew that the SATA plugs could not handle much power however I did not know the limit was 54W

The power limit on the sata plugs is the much smaller pins they have vs the old 4 pin molex connector. They have much better fitmment than the crappy plug they largely replaced, but only support 4.5A of current at each voltage level (1.5A * 3 pins) vs 11A for the bigger molex pins.
 
It'd need a small DC-DC voltage converter to step up the standby power. I don't know of that's ever been made or not.
Back when I had my Dell Precision T1700 I found adapters to use a standard 24-Pin ATX Power Supply.

I guess that was a thing because those Dells can be had cheap and people liked to turn them into "Gaming PCs" although the 4th generation Core i processors are getting a little "long in the tooth" for that now!


View attachment PSU Adapter.webp
 
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Well this was a very short lived device!
Yes the card died already!
The USB-C Power Delivery still works (I tried it even without the card in the slot just with the 6-pin power cable and that part works) however the card will not pass data (Yes it was in the slot for that test) anymore and the PC does not "see" the card at all anymore however I moved it to a different slot and the same result, I even tried another card in the X4 Slot (just to make sure the slot is still good and it is)

Yes it's dead Jim LoL!

I have more questions about this PC but those are for another thread!

Just In-case anyone is wondering why I'm using such an old device and why I had to sell my beloved (but physically big) Ryzen PC
I had a knee replacement back in 02/09/2023 and it got infected and I have been through hell the last year and a half with multiple surgeries and infections.
In the mean time I had to give up my apartment and move into a rehab place so the Ryzen 9 5900X had to go as it was too large :( but I am luckily I kept my old 'test bench' PC around that now became my main PC
I am also lucky that they gave me a private room :)
 
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