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October 4th, 2025 06:47
Tower Plus EBT2250, not working with RTX 5070 Ti
I have a Dell Tower Plus EBT2250 that I purchased new in March with a 1000W power supply and a RTX 4060 Ti graphics card. I would like to upgrade to a new RTX 5070 Ti graphics card that I just bought. It fits fine and I used the 2X 8 pin power connectors to the 3x 8 pin to 12+4 connector for the card, but with 2 power connectors it does not supply a video signal and just shows a red light by the 12+4 connector. According to the web, it means it does not have enough power to function. Is there any workaround to use my new graphics card in this machine, or is it a lost cause?
NVJohn
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October 12th, 2025 01:40
Update: I got it working now. The Dell Tower Plus EBT2250 with a 1000W PSU has an 8 pin connector with a 6 pin connector on each of two cables. I ordered a 2X 6 pin to 1X 8 pin adapter cable from Amazon and connected it to the 2X empty 6 pin connectors. This gave me the 3rd 8 pin connector it was looking for. Once I hooked up the cables again, it fired right up and has been working trouble free for a week now. I ran a few tests to make sure with no issues. My computer is noticeably quieter and the performance is noticeably faster on graphic intensive tasks. Hope that helps others.
jm_10
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December 25th, 2025 00:45
It looks like I have the same problem - missing the third power supply connector.
I have two 8-pin connectors and the RTX 5070 Ti graphics card expects a 3-connector combination. What exactly did you buy on Amazon? Could you send a link? And ideally a wiring diagram for your power solution.
Thanks!
NVJohn
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December 25th, 2025 03:58
I ordered the COMeap 6 Pin to 8 Pin GPU Adapter, Dual 6 Pin Female to 8 Pin Male GPU Power Sleeved Cable 9.5-inch(24cm) from Amazon to add the third 8 pin connector from the 2X 6 pin connectors on the 2 power cables from the 1000 W power supply. It is pretty self explanatory that you connect this cable to the two 6 pin power connectors and then that gives you the third 8 pin connector for the power cable to the graphics card. You should make sure you tuck in the excess cable length so there is no chance of getting the power cables from getting sucked into the cooling fans of the graphics card.
jm_10
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December 25th, 2025 07:01
@NVJohn
Thanks for your solution. I got it. In my case the wires from the PS were already converted from 6 to 8-pin connectors; but there are two of them, so I have to piggy-tail one of them to get the third 8-pin connector. I have ordered the same brand as you did with 8-pins. Thanks again for your help.
jm_10
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December 28th, 2025 23:34
A follow-up on my progress...everything is working just fine now. The COMeap adapter did the trick. Thanks again for showing me the way to make it work. I have actually bought two adapters: one Dual 6-Pin Female to 8-Pin Male (since my version of the PS has two piggy-tails available) and the second - Dual 8-pin Male to 8-pin Female.
Both versions worked; I left the Dual 6-pin Female in the PC.
Today, after all this frustration I finally put my engineering cap on and started to think what really is the purpose of the third connector in our case. We are not really adding extra current to the GPU - the limitation is in the two connectors coming from the power supply (8-pin or 6-pin, does not matter).
I finally came across the following article:
https://hwbusters.com/psus/12vhpwr-connector-cable-psus-size-watt-does-matter/
The explanation is in the 4 extra pins on the 12+4-pun connector going into the GPU board. The table in the article explains that these are sensor pins (there is no way these skinny pins can carry any current). So, all the COMeap adapter does in your case and my case is to provide Ground to pin 2 (Sense 1) of the skinny 4-pin connector.
This is for a 450 W operation (for 600 W operation both Sense 0 and Sense 1 have to be grounded).
Of course we don't have direct access to these pins, and the adapter provides a convenient method of grounding either 1 or 2 of the Sensor pins (pins 3 and 4 are not used).
And as a final thought, if I knew all this a week ago I could have found the sensor pins on the 12+2-pin to triple Female 8-pin adapter and grounded one of the pins...not going to do it now :-) live and learn...