Question about separate PSU for GPU . . . NonSequitur777

[NonSequitur777]

@D_S_T,

You are very welcome! Please follow up with your upgrade project if you don't mind.

Warm Regards,

NonSequitur777

[NonSequitur777]

@D_S_T,

Even though HP hasn't published it, but your Baker motherboard can actually deliver up to 150-watt to your processor, so you should be A-OK. Anything above that wattage demand, and your system will crash as what happened to me with my Reno motherboard when I installed an i7-12700KF, which can draw up to 190-watt.

In order to avoid these crashes, I used a freeware program called QuickCPU to throttle power input to my processor to 150-watt, and my TP01-3003w has happily zipped along just fine since.

I don't think you'll need QuickCPU, but if you do, there is the solution -see my TP01-3003w upgrade link.

Kind Regards,

NonSequitur777

[D_S_T]

Welp.  I think something has gone terribly wrong.  I upgraded the cpu I9-10900KF (no integrated graphics) and cooler ok.  All working well.  I tried installing the new GPU, 4070 ti super MSI 2 2 fan with the new 650 watt HP PSU, with an 8 to 12 pin adapter cable from micro center and no joy.  GPU wouldn’t power up.  

Next tried the separate power supply solution you outlined and the gpu powered up (fans spun) but no display and the pc turned off and back on on its own, again with no display.

I’m stumped, thoughts?

[D_S_T]

Put it all back together, as last worked, 500 watt HP PSU with 4070 GPU and same.  Turns on, shuts off briefly and starts again with no display. 

[NonSequitur777]

@D_S_T,

This is unfortunate, but often legacy upgrade builds like the one you pursue can be finnicky.  -So, let's investigate and analyze this.

Let's assume for the moment that the 650-watt power supply or your motherboard are not defective.

An RTX 4070 Ti Super has a 285-watt TDP and is powered by a 16-pin PCIe power cable. According to TechPowerUp, a minimum 600-watt power supply should suffice to power it in a PC: https://www.techpowerup.com/gpu-specs/geforce-rtx-4070-ti-super.c4187.

Meaning, the HP 650-watt power supply should be able to power it.

An i9-10900KF (95-watt TDP) is compatible with the Baker motherboard, as, for example, this HP Pavilion Gaming Desktop TG01-1xxx User showed with an i7-10700K (8-Cores, 16-Threads, 3.80 GH up to 5.10 GHz) also with a 95-watt TDP: https://www.userbenchmark.com/UserRun/47804659.

Now, you said you used an "8 to 12 pin adapter cable". An MSI RTX 4070 Ti SUPER VENTUS 2X OC uses a 16-pin PCIe power cable, and should be powered by a dual 8-pin to 16-pin PCIe power cable adapter, something like this: https://www.amazon.com/Bangfun-Extension-Sleeved-Designed-4070Ti-13Inch/dp/B0BXDBVK5Z/ref=sr_1_10?cr....

An MSI RTX 5070 I purchased recently came with this power adapter cable, btw.

Each PCIe 8-pin power cable from the PSU should originate from a separate power rail, which the 650-watt power supply provides.

Both PCIe power cables from the 650-watt power supply can each provide 216-watt. Some 650-watt power supplies come with one 6-pin and one 8-pin PCIe power cables, so in order to use the aforementioned dual 8-pin PCIe to 16-pin PCIe power adapter, you'll have to first use a 6-pin PCIe to 8-pin PCIe power adapter cable on the 6-pin PCIe power cable.

Make sure you got the most recent BIOS version (F.53 Rev.A, May 13, 2025) for your PC from here: HP Pavilion Gaming Desktop PC TG01-0000i Software and Driver Downloads | HP® Support.

Kind Regards,

NonSequitur777

[D_S_T]

Yes, I'm certain the cable I got from Micro Center was wrong.  I asked the guy there and he said it'd work but it's on me for not confirming.

  https://www.microcenter.com/product/645753/Premium_Sleeved_12-Pin_to_Dual_8-Pin_PCIe_GPU_Power_Exten...

My concern now is, what did I damage?  Motherboard, not a big deal.  PSU, not a big deal, GPU . . . . eh, bigger deal. Although I reverted back to the last smooth running configuration: 500 watt HP PSU, I9-10900KF with vanilla 4070 and still no display.

The processor is  a KF, so there aren't any integrated graphics.  I'm going to swap the stock I5 back in to see if this is booting to a BIOS screen or something.

Thoughts?

[NonSequitur777]

@D_S_T,

Doggonit [trying exceedingly hard to keep it within Community standards], the guy from Micro Center sold you a 12-pin PCIe power adapter whilst claiming that "it'd work", when he should have known that you needed a 16-pin (12+4) PCIe power adapter cable... What a møron.

Amongst other glaringly obvious clues, the package clearly states: "for 30 series".  You got a high-end 40 series...

Anyway, indeed, what did you damage?

Sadly, your RTX 4070 Ti was powered incorrectly with the wrong adapter, then there’s unfortunately a good chance that your card is irreparably fried. Unlike CPUs or RAM, GPUs have very little tolerance for incorrect power wiring...

Do This:

Reconnect with the proper 16-pin power adapter cable and retest your GPU:

• If the GPU still works (boots, displays, drivers detect it), then you are d@mn lucky -the wrong 12-pin cable simply prevented proper startup.

• If the GPU does not power on (no display, no fan spin, or visible artifacting), then the card may already be damaged.

Kind Regards,

NonSequitur777

[D_S_T]

 The GPU was an open box refurb and came without cabling.  What I tried next was the separate PSU you've outlined many times with a Corsair RM750e and the cable provided with the PSU.  I didn't get anything displaying but the GPU did power on, at least fans were running and it showed life.  But again, no display.  

Where I am right now, is I put everything back together, different, known good GPU: RTX 4070 and the 500 watt PSU combo that's powered and run for a couple of years.  Still no display.  Probably good news GPU wise, hopefully?

Now, the CPU doesn't have integrated graphics so I can't tell if it's loading to a BIOS or safe mode screen or what.  Should I swap the I5 with integrated graphics in and see what's happening?  

[NonSequitur777]

@D_S_T,

Yes, trying the Intel i5 is a great troubleshooting step.  If it works, then it would show that your motherboard is OK, as well as your 500-watt power supply.  If it works, also try out the 650-watt power supply.

Kind Regards,

NonSequitur777

[NonSequitur777]

@D_S_T,

Try the Intel i5 with and without a working GPU and with both HP power supplies.

Kind Regards,

NonSequitur777