I've just ordered an RM850x as well as that cable for the disc drive (managed to order from U.S. Amazon).
The RM850x dimensions are 150 x 86 x 160 mm (WxHxD). I do hope this will fit? A previous thread that was linked mentioned it would.
As an additional question @Vic384 . I received my RM850x PSU today, though I'm still waiting on the DVD adapter cable.
Given some of the heating issues in the XPS 8930, would my new PSU (which I presume to be slightly larger than the OEM) cause any increased airflow or heating issues?
Should I take the step of getting one of these as well for the CPU? I've seen some recommending this for the 8930, but I don't know if it would fit in my planned new setup.
I don't really know much about all of this, but would it fit/replace the blower/be a good idea to do? The fan itself is pretty cheap, and if it makes a beneficiary difference that's worth it.
I would think about replacing the top fan if your XPS 8930 has one of those smaller top fans like that discussed here: https://www.dell.com/community/XPS-Desktops/XPS-8930-SE-top-fan-not-same-as-XPS-8920/td-p/7190716
There is also some discussion in this forum about adding a front fan. See this: https://www.dell.com/community/XPS-Desktops/XPS-8930-GPU-and-CPU-Liquid-Cooler-PSU-Case-Swap-Upgrade...
I think those changes would improve cooling more than changing the CPU cooler. The top fan will help air flow in the top half of the case and the bottom front fan will help with air flow in the bottom of the case. The slightly larger power supply should not make any difference although being modular will help because you may not have as many cables to block air flow.
I managed to locate a 120mm fan as often recommended in other threads, but the problem seems to be the mounting bracket that you need, which only appears to be sold on eBay (https://www.ebay.co.uk/itm/Dell-XPS-8910-8920-Alienware-Aurora-R5-Top-Cooling-Case-Fan-7M0F5-X64T5/2...), and even then, I'd hate to receive a fan that didn't come with that bracket attached, making it pointless.
I hate that this system came with inadequate components to handle the hardware, forcing you to jump through hoops trying to track down parts to correct it all, especially what was paid for it.
Would the blower CPU cooler be an option as well to look at, the one they apparently fit to the K model processors?
@Moab23 Yes, it appears to only be sold on eBay, but it appears to come with the fan attached to the bracket.
Yes, the CPU heatsink and fan that comes with the K processors is an option but the price is around $82. Here is a link about that heatsink and fan: https://www.dell.com/community/XPS-Desktops/XPS-8930-Special-Edition-heatsink-question/td-p/7445043
I think I'll call Dell tomorrow and see if I can't get them to cough up a fan and/or bracket first, otherwise I'm going to be spending £36 just for a bracket I should already have, considering the fans are pretty cheap by comparison.
Do you think pursuing something like the Arctic CPU cooler would be more efficient than the stock fan they've fitted to the CPU? I'm going to try everything I can within reason to reduce temperatures if I can, even by a little.
I think the problem with the Arctic CPU cooler is that the fan is right up against the power supply, but it may work better than the OEM fan. The cost is certainly more reasonable than the K processor heatsink/fan.
I searched to see if someone has installed one in a XPS 8930 and found this: https://www.dell.com/community/XPS-Desktops/XPS-8930-i7-8700-3rd-party-CPU-cooler/td-p/6108230. Be sure to clean off the old thermal paste and apply new thermal paste.
Well, I contacted Dell. On the phone for over an hour trying to determine whether or not I could acquire the Aurora R5 fan bracket from them. Repeatedly told it was 'not compatible' or usable in the 8930. Also told the smaller diameter fan is more than sufficient for gaming (before being told it runs the latest 'Simcity' a game that was last released in 2013) when it clear isn't the best for heat extraction.
So now I'm either resigned to acquiring that eBay one for £36, or wondering whether a more efficient 95mm would fit the same place (but I've never seen anyone recommending that, sigh).