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02-15-2019 02:29 AM - edited 02-15-2019 02:41 AM
The concerns for using the GTX 1080 Ti in a Dell Precision T5500 would concern: dimensional fit- each version could be a differnt size, the power supply, adequate cooling, cooling configuration, and PCIe slot rating , PCIe slot position.
The HP version is a reference /Founder's Edition:
This is among the most compact version, and the single blower-style fan is the proper cooling in workstation as it exhausts the heated air out the back panel as oppsed to gaming soultions that push the air into the interior of the case.
The T5500 spec states: that the T5500 supports for two PCIe Gen 2 GPU's up to 150W each.
The important information there is that there is 300W avaialable for GPUs- and the GTX 1080 Ti is rated at 250W - good news, but that the GPU slots are PCIe 2, is not good news as the GTX 1080 ti will not function at top potential.
On Passmark baselines, there are 4X Dell Precision T5500 systems running the GTX 1080 Ti having 3D marks of 8062, 7510, 6744, and 6367. For comparison, the Pasmark average 3D mark for 1080 Ti is 14203. The 2D marks are: 594, 548, 438, and 418. This suggests that the PCIe 2 slot, in combination with the CPU and chipset architecture and clock speed of the T5500 can not extract top performance. For comparison, I use a GTX 1070 Ti in an HP z620 (E5-1580 v2 8C@4.3Ghz) and the 3D= 12679 (av= 12309) and 2D= 819. The best mark for GTX 1070 Ti in a T5500 is 9210 - better than 1080 Ti and the top 3D mark of the 1,301, T5500's tested is 11109 using a GTX 1080 on a single Xeon X5690. . The top GPU's in T5500 are: 1080, 1080, 1070, Titan X, 1080, 1070 Ti, 1080, 1060, 980,1070 , and etc. The top GTX 1080 Ti is No. 32 and even a GTX 970 is still better at No. 24. The LGA1366 CPU's and memory bandwidth must bottleneck the 1080 ti to a greater degree.
Depending on the uses, the graphics performance may be adequate to need, but as great as the Precision Tx500 series were- and I had a T3500 and T5500 (2X X5680 / 48Gb / Quadro FX4800 / PERC H310 6GB/s ), the PCIe 2 GP, USB 2. and SATA II are limiting factors. If a GTX 1080 Ti level of graphics performance is required, consider the quite reasonable cost of a HP z420 using a Xeon E5 v2 , with PCIe 3, SATAIII and USB 3.0. This represents a better investment: if a z620 can have up to double 3D performance from a 1070 Ti, to a T5500 1080 Ti, the difference in the lower GPU cost alone (about $300) can represent a significant proprtion of the system purchase. If single thread performance is important, there are fast 6 and 8-cores such as E5-1650 v2, E5-1660 v2, E5-2667 v2, and E5-2687w v2. The average Passmark CPU mark is 12772 and single thread of the E5-1650 v2 is 1998 whereas the CPU mark for the Xeon X5690 is 8894 and single thread = 1505. If a lot of cores are necessary, a single Xeon E5-2680 v2 10-core averages a CPU of 15900 and single thread of 1659. I'm very fond of LGA1366, but today, it's performance fallen a bit far below current software demands.
Sorry for the long ramble off the topic.
02-15-2019 07:19 AM
Thanks for all the info. You see I did have (once) 2 1070's working in my dell and since the GPU power connecter on the cards are just one (8 pin) . I was able to make the 6 pin cables (from the 1100 watt PSU) into a 8 pin cable, and it worked. However, the HP 1080 TI has one 6 pin and one 8 pin connecter , and I can find't the right connecters for it, at the moment the card is in my HP Oman. But I want to fit in inside my dell T5500 since it has (2) 6-core, 3.46GHz CPU's and 48GB ram, SSD drives too.. The problem I see is the power connecters to the card.. in the Oman there is a brown wire going to each connecter.. What does that wire do.. Oh , also what is the voltage going through each wire to the TI connectors Please, as that will help me making a cable up..
02-15-2019 09:18 AM - edited 02-15-2019 09:20 AM
If the GTX 1080 Ti is to be the only GPU in the T5500, consider first trying 1X 8 pin + 1X 8-pin to 1X 6-pin + 1X 2-pin. , using available sources, for example Scan:
> which offers six choices for the 1X 6-pin + 1X 2-pin.
or Amazon in the UK or Geizhals in the EU. These do have to be high quality, heavy gauge wire .
Sorry, I don't know what the brown wire might be on the current- no pun intended-connector. The Dell site should have links to the connector pinouts, and here is an introduction to the subject of standard connectors' pinouts:
02-15-2019 03:31 PM
Thanks for the onfo. But I do have one other question.. I pulled out the HP 1080 from my Omen and installed another graphics card. I think it's a old Raeon HD 57*** 2GB.. The Omens gpu power cable plugged (Card has (2) 6 pin connectors. Theres power to the card but no video output. Whats going on. The Omen can't use older graphics cards, or is because of the PCI-E 3.0 slot..