Wow! Is it just the Haswell Dells or pre-haswell too? I have a Ivy Bridge Dell Optiplex 9020 (i7-3770) that has a GTX 1070 Mini (Pascal). If there was a way to fit my GTX 2070 in it, I'd try it and see.
From what I understand, the Sandy Bridge era Dells (say, XPS 8300 for example) will work with up to the 10-series Nvidia cards, but not the 16- or 20- series.
The Haswell era ones were fine with video cards that needed UEFI (My R9 285 would NOT work on my XPS 8300, but works fine on my XPS 8700), and I know they work with the 10-series Nvidias, but haven't been able to confirm on the 16- or 20- series.
I've come across two posts that state they worked, but had stability issues. However, since the specific PSU isn't mentioned in
this one, I was unsure. However,
this thread contains a little more detail with the Haswell-based XPS 8700. Two people mentioned instability, but two others followed up, saying:
I just helped my friend with this issue. Not sure which combination of things did it but I replaced the motherboard battery (assumed dead did not volt test it). Updated the BIOS through the dell website to version A13. Went to power settings and set it to high performance mode and disabled putting the PCIe into sleep mode in the advanced setting. Seems to be running stable now.
disabling PCIe into sleep mode worked for me!
Thanks
The latter was one of the two people who originally reported instability, so it seems that maybe the later cards WILL work on Haswell based Dells.
However - This may all be a moot point for
@ssilverfox 's machine, given that it's a small form factor.
I just did a quick search, and, unfortunateyl, it looks like it has the same issue as my son's old Inspiron 3647 small desktop. Not only does it require a low-profile card, but that card MUST also have a cooler that fits within a single-slot profile, as the PCIe slot is all the way at the very edge - and any cooler that's too tall will not fit. In the case of my Inspiron, because of the position relative to the case, and in the case of the OptiPlex, because of the position relative to the PSU.
At least, if this is the correct motherboard:
And this is the positioning when installed in the case:
I do know from personal experience that a Radeo R7 250E low profile single slot card fits. Specifically, I have what Sapphire calls an "R7 250 Low Profile" (which is actually an R7 250E rather than an R7 250).