Upgrade PSU from 460W to 850W in Precision 3630

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Did @DELL-Cares answer?

If it takes a normal sized PSU, EVGA B1 or BR should work.  Corsair is a good brand too.  You might even find one made by Dell.

Did you ever manage to find a suitable 850W PSU for the 3630? I am also looking to upgrade to a 850W PSU with the same PC.

I couldn't find a Dell 850w PSU for the 3630 either.  EVGA is the next best bet.  Make sure it has the same, if not more, power on the 3.3v/5v rails.  Otherwise, it won't work.  Some PSU's boast more total wattage, but skimp on the 3.3v/5v rails.

IF you have an actual Tower A regular EPS12v power supply with 150W on the 3.3v/5v rails works fine.  HOWEVER the power to the optical drive is SATA 15 pin to mini sata 6 pin.

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

https://www.dell.com/support/home/en-us/product-support/product/precision-3630-workstation/docs

Driver issues seeing drives
.

EVGA 850

https://www.evga.com/Products/Product.aspx?pn=110-BQ-0850-V1

https://www.amazon.com/EVGA-Bronze-Modular-Warranty-110-BQ-0850-V1/dp/B01FYDUCA0

Thanks very much for the quick replies. Do you think this would also work?: 

https://www.amazon.co.uk/EVGA-SuperNOVA-Modular-Warranty-220-G5-0750-X3/dp/B08463Y238/ref=mp_s_a_1_3?dchild=1&keywords=EVGA&qid=1608409023&sr=8-3

realised a 750W is probably sufficient, I primarily need this to power a GPU which has a recommended PSU of 650W.

As far as I can tell this should be compatible with the motherboard in the 3630?

It looks nice, but I'm not the most confident about it working.  Check the total 3.3v/5v wattage on your current PSU.  Is it 142w?  The PSU you linked says 120w.

One thing I don't quite understand though is why it says only 120w.  Volts x amps = watts.  Therefore, I'd think the total would be 199.20 watts.  May be speedstep would know more about that.

Below are 2 screengrabs.  The PSU you linked and a label from a Dell 460w PSU for the 3630.  By the way, I had to greatly blow up the image and upright it for the 460w PSU.  So it's a little blurry and might be blurrier once uploaded.

It would help to know what GPU you plan on using.  If you already know its watts, that's also a plus.

If you want - What's your exact CPU?  I can check it against the GPU for any potential bottleneck.

having less than 140W might be a problem

power supplies have more than 1 rail and more than a single spec of watts.

750 g5

The GPU I have is an RTX3070 and the CPU I have is an i7-9700, I will keep looking to see if I can find another compatible PSU, thanks again for your help so far and for pulling up the Dell 460W PSU specs

In that case I may go for the one you suggested previouslyhttps:

www.amazon.co.uk/EVGA-BRONZE-Modular-Tester-110-BQ-0850-V3/dp/B01H78DPIQ/ref=asc_df_B01H78DPIQ/?tag=googshopuk-21&linkCode=df0&hvadid=310739933748&hvpos=&hvnetw=g&hvrand=11068922224553398997&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9044967&hvtargid=pla-563160715888&psc=1

this looks like it has 160W for the combined output on the 3.3/5 rails

Do you think the PSU originally suggested by speedstep would work?

https://www.amazon.co.uk/EVGA-BRONZE-Modular-Tester-110-BQ-0850-V3/dp/B01H78DPIQ/ref=asc_df_B01H78DPIQ/?tag=googshopuk-21&linkCode=df0&hvadid=310739933748&hvpos=&hvnetw=g&hvrand=11068922224553398997&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9044967&hvtargid=pla-563160715888&psc=1
looks like it has sufficient output for the 3.3/5V rails

Yes, the PSU linked by speedstep should absolutely work, without a doubt.  It goes along with what we both been saying - must have the same, if not more power on the 3.3v/5v rails as the original PSU.  And the linked PSU exceeds speedstep's recommendation of 150w on those rails.

Amazing thank you! I just ordered it today. Will let you guys know it works once I get it installed on the 24th.