Precision T5500 Power Adapter Query

I have a question about the types of power adapters on the DELL Precision T5500 for use on EVGA graphics type cards. Hope some-one could please answer my queries.

So I have this T5500 with its stock standard 875W Power Supply Unit with two 6-pin power connectors.  The whole system originally came with an NVIDA Quadro FX 5800 graphics card and it was using a dual 6-pin to 8-pin adapter to power that card.  That card typically ran very hot so I swapped it out with a DELL NVIDA Quadro 2000 some time ago.

I’m currently researching an upgrade path and want to move from the current Windows 7 Ultimate to Windows 10 Pro and introduce a better GPU.  I have my eye on the EVGA GeForce GTX 1070 SC2 (P/N: 08G-P4-6573-KR).  Green PC Gamers site references a YouTube video showing fitting instructions to power an EVGA Geforce GTX 1080 GTX.  It looks like I can still use that same dual 6-pin to 8-pin adapter to power up the EVGA GTX 1070 SC2 graphics card.  I believe it should work without issue.

However, as an alternative, I also have my eye on another EVGA card. The EVGA FTW2 GTX 1070 Ti (08G-P4-6676-KR) but it looks like this card requires a "two" 8-pin connector input feed.  Is it possible to use this card on the T5500 PSU with some type of adapter that could be purchased?  To me, it doesn’t look like to be possible so checking here as well.

On the next level up is the EVGA GeForce GTX 1080 Ti SC2 Gaming 11GB (11G-P4-6593-KR) and on this card is a 6 pin and 8 pin power connector, side by side.  This is one of the recommended EVGA cards on the Green PC Gamers web site for the T5500.  So being a recommended model, what type of power adapter is needed?  I’m assuming you would need to use something like a single molex to 6-pin adapter and the dual 6-pin-to-8-pin adapter at the same time to power the card.

Any advice and guidance would be much appreciated?

Tony G

DELL Precision T5500
Standard 875W Power Supply (Model: H875EF-00)
2 x Intel 6C Xeon X5690 3.46Ghz
NVIDIA Quadro 2000
Samsung  860 Pro 512GB SSD (Boot)
Seagate ST2000DX001 Desktop SSHD 2 TB
Seagate ST31500341AS 1.5 TB
SYBA SD-PEX40054 PCI-Express 2.0 x2 SATA III (6.0Gb/s) HyperDuo 4-port RAID Controller Card (JOBD configuration)
Sound Blaster X-Fi Titanium
Microsoft Windows 7 Ultimate (x64)

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  • Tony G Thanks for sharing your build!


    We've had great success using 1 x 6 Pin Male (standard on Harness) and 1 x 6 Pin Female to 8Pin Male Adapter when using cards that require 1 x 6Pin and 1 x 8Pin Power.

    You'll want to stay away from the FTW cards.  They will not fit inside the T5500 chassis unless you modify the PCI Bracket and Side Panel.  The cards recommended on our T5500 blog page have been verified to fit.

    Also check out our GPU Power Adapter Guide:


    These cards seem to be the best value w/minimal bottle-necking when it comes to the T5500 Workstation:


    EVGA NVIDIA GTX1660 Ti 6GB Graphics Card

    EVGA NVIDIA GTX1070 8GB SC Graphics Card

    EVGA NVIDIA GTX1070TI 8GB Graphics Card

    EVGA NVIDIA RTX 2060 6GB Graphics Card

    EVGA NVIDIA RTX 2070 8GB Graphics Card


    Let me know if you have any other questions.

  • I eventually went with the EVGA GeForce GTX 1070 SC2. However, due to the size the EVGA 1070 video card (dual fan model), I had to remove the small steel/aluminum piece on the hard-disk tray just to make room for the power connector into the card.   Like the Quadro FX 5800, this EVGA video card is also a little on the heavy side so I came up the idea to re-use the anti-sag extender bracket from the Quado FX 5800. To make this work, I found a rectangular piece of brass metal from an old door hinge and fashioned it so a portion of the brass plate just sat over the three screw holes on the end part of the back plate of the EVGA card. Measuring and drilling three countersunk holes into the brass plate, it aligned with these three holes.  I then simply used the three small screws from within the EVGA card to hold the brass plate onto the back-plate.  I then drilled three holes into the cast iron extender bracket so I could affix the brass plate with three bolts to firm it up.  With these careful measurements made and the bracket firmly attached, it slides into the slot found on the back-end of the plastic front fan assembly.  A very crude improvisation but it works perfectly. It now sits very stable on the motherboard and the card is working admirably. 🙂

    Next issue I’m looking at is determining whether to flash the BIOS from version A16 to A18 to overcome the issue brought on by the Spectra and Meltdown vulnerabilities.  It looks like some users are finding that it fails so I’m a bit hesitant at doing this.  I’ve run the InSpectre utility and it currently reports the performance of my system is slow so I’m wondering if the A18 BIOS update would improve the performance when applied (??).  I read elsewhere that Windows 10 (1903) may help with the performance in some way whilst providing protection from the Spectra and Meltdown vulnerabilities.  Not too far away from upgrading to Windows 10 Pro so I'm looking forward to seeing what performance improvements this brings along with the other hardware system updates I’ve done overtime.  A spare PCI slot remains and I might look at installing a NVME adapter with M.2 based SSD for scratch disk/program running purposes.

    Tony G

    DELL Precision T5500 (Intel 5520 Chipset – DELL 0CRH6C Board)
    Standard 875W Power Supply (Model: H875EF-00)
    2x Intel 6C Xeon X5690 3.46Ghz
    72 GB RAM – DDR3 ECC REG 9 x 8GB PC10600R Shielded
    EVGA Geforce GTX 1070 SC2 Gaming, 8GB GDDR5 with ICX Technology
    Samsung  860 Pro 1TB SSD (Boot-Drive and Programs)
    Seagate ST2000DX001 Desktop SSHD 2 TB (Data Storage)
    Seagate ST31500341AS 1.5 TB (Data Storage)
    SYBA SD-PEX40054PCI-Express 4 Port SATA III RAID Hyper Duo PCIe 2.0 x 2 card (JOBD configuration only)
    Creative Sound Blaster X-Fi Titanium (SB0880) PCIe 7.1 Channel Sound Card
    Microsoft Windows 7 Ultimate (x64)

  • Tony G thank you for sharing your build!

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