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Moab23
2 Iron

XPS 8930 PSU Dimensions (Corsair RM750x)

Hi all.

I've been having an occasional issue with my XPS 8930 (during games) going to a black screen, then coming back up pretty much frozen. Doesn't always happen. Sometimes you can be gaming for hours on end without a problem. Sometimes the problem happens after weeks of the last event, on on occasion it happened two days in a row. 

Since I'd already gone through the process of disabling my HDD going to sleep and also disabling Dell's SupportAssist Remediation program, I thought that had more or less sorted it (it did stop the random 5 second freezing that happened quite frequently).

So my current theory for this issue is either:

A) The OEM power supply (which I think is 460W?) doesn't have enough buffer space. I totalled the wattage of my parts to around the 410 to 420 mark. 

B) Its something to do with Dell's updates. I don't recall it doing it before, but after I rebooted my PC (restarts fine each time so far) there was a notification about a Dell Update being installed. I dunno whether this could be the cause or not, but I couldn't find clear answers on exactly which parts of the Dell Update programs to either disable or uninstall. 

Anyway, if it was the PSU, I've been trying to work out a suitable replacement. Namely, I want to be sure it would fit. I saw mentions of the Seasonic Focus PSU, but it doesn't seem to come with a UK plug. So I've looked at a Corsair model, specifically an RM750x. Fully modular (since I've heard this may be better for the 8930 chassis), dimensions being 150 x 86 x 160. I saw someone mentioned installing a 650 model with the same dimensions, but I just wanted to be sure.

I figure it'd be a pain to take my PC to the shop just to have them see what might fit inside and then go through the process of bringing it back then taking it over again.

If anyone could shine any light on this I'd greatly appreciate it. It was great to solve those initial annoying hiccups, but this total freeze issue has me worried that one day its going to damage something. 

Thanks in advance.

 

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23 Replies
Vic384
4 Beryllium

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

"I saw mentions of the Seasonic Focus PSU, but it doesn't seem to come with a UK plug." Can't you just use the power cable that came with the XPS 8930 with the Seasonic power supply? The Seasonic power supply voltage range is 100-240 VAC.

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Moab23
2 Iron

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

I've never been too keen on mixing plugs with hardware they didn't come with. 

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Vic384
4 Beryllium

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

According to the Amazon UK site, the Seasonic comes with an EU plug, so that will not work for you. This post by HanoverB mentions other power supplies that will work including the Corsair RMX Series RX850X: https://www.dell.com/community/XPS-Desktops/XPS-8930-GPU-and-CPU-Liquid-Cooler-PSU-Case-Swap-Upgrade...

It seems that the RM850X, RM750X and the RM650X all have the same dimensions, 150x86x160 whereas the Seasonic is 140x86x150.

 

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Moab23
2 Iron

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

Thanks for the pointers. I never found that thread during my original search, so kudos for that 🙂

Regarding the other potential issue I mentioned, would you know if this could all be related to the OEM PSU having too low a wattage (I also get what sounds like coil whine from the GPU when in use), or could it be something related to the Dell Updates?

Thanks again.

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Vic384
4 Beryllium

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

I do not think coil whine can be attributed to how much power margin you have remaining in your power supply. Coil whine is a result of the power regulating process and sometimes the frequency is such that you can hear it. The black screens and freezing could be the result of issues with video drivers or game software. I don't recall any reports of such problems related to Dell updates in this forum.

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Moab23
2 Iron

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

Hoping its not the GPU. I know this model can have some heating issues, but I supplement the cooling with a USB desk fan running off a power strip, just to add some additional cool air toward the vents when gaming. The crash would trigger during lower intensity gaming more often than graphically intense moments. 

I'm considering going for the RM850x model since the cost difference between it and the 750 isn't huge and they're the same size. I've seen people mention about requiring a cable for an optical drive, but I can't seem to narrow down which one I might need. I have a laptop style DVD drive in my system. 

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Vic384
4 Beryllium

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

"I've seen people mention about requiring a cable for an optical drive, but I can't seem to narrow down which one I might need." The thread I linked to earlier had a link to this mini-SATA cable required for optical drive with PSU upgrade: https://www.amazon.com/gp/product/B07FK5G2TF

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Moab23
2 Iron

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

Unfortunately the same cable doesn't show up on Amazon.co.uk. 

Edit: Another check shows it is, but its unavailable. 

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7 Thorium

Re: XPS 8930 PSU Dimensions (Corsair RM750x)

Not sure why you say "Seasonic comes with an EU plug"

Most all Dell units can use various power cords.

So when you are in USA you use NEMA 5-15 to C13 Power Cord 

https://www.dell.com/en-us/work/shop/american-power-conversion-c13-to-nema-5-15p-power-cord-8-ft/apd...

 

in Europe you use SHUKO  CEE7/7 to C13 cord

https://www.dell.com/en-uk/work/shop/c2g-c13-to-cee7-7-european-power-cord-black-2m/apd/a6929301/pow...

 

and in UK /Ireland

BS 1363   to IEC 60320 C13 cord.

https://www.dell.com/en-uk/shop/c2g-c13-to-bs-1363-uk-irish-power-cord-black-2m/apd/a6927684/power-c...

All with the same power supply that auto switches between 110 to 250v.

The issue you need to worry about are the physical dimensions of the power supply.  Some of them are too large to fit into the case.

 

Thats why I recommend EVGA 700BR as minimum upgrade.

https://www.bestbuy.com/site/evga-700w-atx12v-eps12v-80-plus-bronze-power-supply-dc-dc-technology-bl...

There will also be a cable needed for the optical drive  15 pin to 6 pin mini sata power.

https://www.amazon.com/CRJ-15-Pin-Slimline-Sleeved-Adapter/dp/B07FK5G2TF/

 


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