Will both of these psu's work in my HP DC7800?

I'd like to upgrade my video in the dc7800 but it will need a stronger psu of around 400 watts. I know psu 1 will work, but I've just seen psu 2 and I'm wondering if that might work as well.

PSU 1:

http://www.atxpowersupplies.com/365-Watt-Power-Supply-Delta-DPS-365BB-A.php

* Replaces and upgrades HP DC7800 power supplies
* 400 Watts w/ 460 Watt upgrade option
* NEW, not used or refurbished

Product Description:

Since the original model of this power supply is no longer produced by its manufacturer, we developed for you a 400 watt power supply replacement for the HP DC7800 that uses part numbers 437800-001 and 437358-001. It has an odd shape that renders most power supply replacements useless because they will not fit. This power supply is new, unlike most other 437800-001 power supply replacements you may find on the internet. Please see the list below for all power supplies that this power supply replaces.

Technical Specs:

* 5.9" Wide X 3.75" Tall X 4" Deep
* One ATX connector (20/24 pin)
* One P4 connector for P4 motherboards
* Four molex connectors
* One Floppy connector
* Three SATA connectors
* One AUX connector
* Two PCI Express connectors
* One HP video power connector
* One Dell 6 pin connector

Output Max. Load
+5Vsb 2.5A
-12V 0.8A
+12V 21A
+5V 21A
-5V 0.5A
+3.3V 16A

(I know it's cheaper elsewhere) Also. This unit is much shorter than the original so the depth difference in these 2 models doesn't seem to be an issue. Maybe screw location though?
.......................................................

PSU 2:

http://www.amazon.com/Kentek-Supply-ATX12V-Compatible-KENTEK/dp/B005CYXW7M/ref=cm_cr_pr_pb_t

SPEC Type: Standard ATX Maximum Power: 400W Fans: 1 Dimension: 5.9"(W)x3.4"(H)x5.5"(D) Main Connector: 20-pin/ 24-pin Switchable x1,P4 ATX12V 4 pin x1,Floppy 4 pin x1,Prepherial 4 pin x3,SATA pin x1 *Above are all the connectors included in this power supply. your system may not need them all. it is fine to leave unused connectors unplugged. Hold-up Time: 16ms minimum with full load 115 VAC/60 HZ Efficiency: > 70% Over Voltage Protection +5V: 7V Max., +3.3V: 4.5V Max., +12V: 15.6V Max. Input Voltage 100-120 vac / 200-240 vac Input Frequency Range 50 / 60hz Output +3.3V @ 18A, +5V @ 22A, +12V @ 13A, -12V @ 0.5A, +5VSB @ 2.5A MTBF: >100,000 Hours (11 years & 2 months) * Excludes the life of the fan
.........................................................

I've never had to deal with psu's before so there's probably complications out there I'd never even consider.

Thanks.

 

It will usually either be a micro atx or full atx power supply.

There are 3-4 different models of your computer and they vary wildly in size from a full desktop,small form factor,ultra slim thing as thin as a dvd player so you'll have to find the service number of your computer the look up the power supply specifications, if you link to your support page or specification documents one of us can point out which model of power supply you need.

Alternatively full ATX power supplies have these dimensions, the power supplies you have posted are both full ATX so if your current power supply has these dimensions then either of those will fit no problem.

Micro ATX is 2.5 X 4.9 X 3.9 inches.

Dunno what they're talking about with odd shape, the picture of the first power is just a micro atx power supply with a full atx adapter plate, if your power supply has this format you can just swap for a micro atx power supply and use the old adapter plate.

 

Hi,

I was just reading and the difference between 1 and 2 is that mounting bracket. #2 does not have it. This is another one that seems to have the mounting bracket http://www.amazon.com/Power-designed-guaranteed-Convertible-Minitower/dp/B004D9N3P8

Going with Rikky's idea, does yours have a mounting bracket and is it removable/reusable? I'm thinking that the bracket fills in extra space in the back of the case. In other words the square whole in the back of the case is larger than most cases and the bracket is needed to fill the gap.

 

Mine is the SFF model, which is the mid size of the three designs.

I downloaded the manual. It's too big to attach though. For what it's worth though the file name is: (2 MB)


HP DC7800 Series Desktop PC Technical Reference Guide.pdf

Once again, everything is complicated.

 

Interesting. I didn't see that one on Amazon. I'm in no hurry and I might scrap the upgrade altogether if it keeps getting more complicated.

The feedback is greatly appreciated. I'm going to open up the case tonight for another reason. I'll see what I can find out about how the psu fits.


The psu of my model is referenced on page 83 of the pdf mentioned earlier.

 

Yes, I was looking at some of the ones on Ebay that had been pulled from old PCs and I didn't see the bracket, they looked like just normal ATX PSUs. But a lot of the links for upgrades like your 1st link seem to think the bracket is necessary.

I think it might be worth removing your current PSU and getting the exact model number and dimensions from it. That should help clarify things. It should just be a few screws and you might also look to see if it has some sort of piece that slides into a slot on the case. Read this review to see if you can match up any details or if it seems it like a red herring.

HP/Compaq is the worst on PSU replacement. It makes no sense because they didn't even offer their own upgrades--they just made it difficult to upgrade period.

Edit: I think I read that PDF and it gave alot of details about power usage but no dimensions of the power supply. I think the difference between the two models that use internal power supplies was just the middle option being standard efficiency and the higher option being +80 certified efficiency. I think as far as size they are interchangeable.

 

I think I'm out of luck.

After opening up the case, my psu looks nothing like the pics from any web site yet.

The model number is HP #437352-001 Spare #437798-001.

My psu is L-shaped and wraps around the hard drive which is nestled underneath it.

The web pics must be of the larger case units. Inside the 'cage' is an array of wires and scary electronic components; it doesn't look like the 'cage' covers any sub-case at all..it's just a mass of wires etc inside the cage.

I took a photo of the bottom of the cover as it shows how to get to the HD underneath the psu. The psu cage is hinged and flips up, towards the back of the case. Actually. pretty clever...as long as you don't ever want to replace the PSU. There was no tab or anything that would hold up the psu.

Brian

The Top of the Cage is 6.25" along the rear of the case; 5 5/8" from the rear towards the front; 2.5" high at it's maximum height. The short part of it's 'L' encloses the fan.

 

It's a 240w max psu.

 

Yes, that is typical Compaq/HP--cool looking design but totally proprietary.

A quick look around seems to indicate no one has attempted to make an upgrade for that design. I think you are correct, you are out of luck with that case/psu.

In consolation, if things are that tight in the case it probably doesn't have enough spare air flow to keep a more powerful video card at low enough temperature, anyway. *sour grapes*

I think you'll be better off going back to looking at barebones kits or other options for upgrade.

I'm glad you took a look at the present design before making a decision.

 

Bummer! If you had the CMT, the largest on the three designs, you'd probably be able to fit an standard ATX PSU in it. I have a HP Compaq Business Desktop d530 CMT and was able to fit a standard ATX PSU in it. The dimensions of the PSU and screw hole placement of the new PSU were not the same as for the HP proprietary PSU but, by drilling 2 or 3 holes on back of the computer, I was able to mount the standard ATX PSU.

 

http://www.ebay.com/itm/437352-001-437798-001-HP-POWER-SUPPLY-/230451155783

http://www.sears.com/hp-437352-001-hewlett-packard-240watt-24-pin-mini/p-SPM6324235908

used http://www.txcesssurplus.com/servlet/the-9618/HP-Compaq-437352-dsh-001-240W/Detail

 

Yep. There won't be much game playing on that machine, that's for sure.

Tiger Direct really got wiped out of their supply of barebones, at least the AMD setups. They were down to offering just 6 packages, when there used to be at least 20.

I just checked, they now offer 34 AMD packages.

I'll keep looking. I'll be OK for now if Call of Duty 2 plays on the DC7800 SFF. Not too hopeful though.

Thanks guys for all the help. I know quite a bit more about computers now, especially how important PSU's are to upgrades.

I'll flag my post as SFF to help others in the future who might think of trying to upgrade.

Brian