Cpu cooler compatible with HP dc7100 motherboard

arajigar · Jun 11, 2016

Hi, I have recently find myself in trouble trying to install a replace cpu cooler for my HP dc7100.

The motherboard is a MB-DC7100-TW-HPQ and it is located inside the case as shown on this photo:

The cpu heatsink is working, more or less, although now, in near summer, and with temperatures of 24-30º Celsius inside my room (no air conditioner) Speedfan shows Core temperatures of 52-55º C on idle, more than 65º C on load, I didn´t try to put the system on full afraid of damaging the processor.

I have modded the case opening three 120x120mm windows and adding 4x120 mm fans, so I have now 1(front), 2(side), 1(top), and 1x80 mm (rear), luckily I have lowered temperatures about 8-10 degrees, showing 45-47 on idle and 57-60 on load. But I want better temperatures, so I decided to put a better cpu heatsink.

The original is this:

and i wanted to put this:

The problem is that the new heatsink crashes directly with the surrounding capacitors placed around the cpu socket:

I have discovered after hours of frustration that it needs the aluminium plate that contacts with the processor to be +/- 3 mm taller to make the fins avoid crashing with the capacitors. So, here´s my question, what cpu cooler should I use?. It´s a LGA 775 processor ( Pentium 4 Processor 540/540J HT 1M Cache, 3.20 GHz, 800 MHz FSB).

Thanks in anticipation!.

junkeymonkey · Jun 11, 2016

well that the thing with proprietary motherboards like dell or hp prebuilts but look at this one it should be ''high'' enough for clearance and uses amd and intel ''stock'' type mounting as well [amd latch and intel push pin ]

http://www.coolermaster.com/cooling/cpu-air-cooler/vortex-plus/

bottom of the page there some clearance specs diagrams

look like theres clearance around the socket ?

http://www.newegg.com/Product/Product.aspx?Item=N82E16835103084

arajigar · Jun 11, 2016

Wow!, looks like it is the perfect candidate. With 116 x 100 x 84 mm I think it'll fit into the case, even with the 120 mm fan placed aside of it.

Edit: I was surfing a bit to see what' s the oppinion about this cooler and I was a bit worried about HOW MUCH problems about its fixing system are reported, do you know if there's a similar cpu heatsink with a fixing system that uses screws as the stock FOXCONN heatsink do?

junkeymonkey · Jun 11, 2016

well that cooler I posted uses the intel push pin like the one you said did not clear ?? also its got a 92mm fan not a 120 mm? so it shouls mount easy with stock intel mounting holes in the motherboard

maybe your old coler just needed a fresh paste application ? or maybe a look at the fan used on it like not able to spin up that olde cooler should still do as well as it did new so may just need a bit of prevent maintenance ?

also if you got a room temp as you say and no A/C that's 86f ambient ? any cooler may not be of much help until you figure out a way to cool that room down

arajigar · Jun 12, 2016

Oh, the cooler was cleaned up entirely, applied new thermal paste and all system was cleared of dust before I did the case mod. The problem with the push pins is that the motherboard is installed onto a detachable tray which include several screwholes made on little metal brackets that made impossible to make the push pins be secured because they're too short.

I thought that a new cooler is necessary because a quad core I have in the same room has way better temps with a similar fan setup.

http://www.tomshardware.co.uk/answers/id-3076705/homemade-build-stable.html#18056147

I know that P4s run hotter, but 16 degrees celsius seemed to me excessive, so I have started cleaning all system from dust (no luck), then applying new thermal paste (2 degrees down, not much improvement), and then I made the three windows to the full closed pc case ( wtf are HP's guys thinking when they design their pc cases?) to put three 120mm fans(success finally!, but I want better temps).

Then I have decided to put a new hs, but now I know that I need one that uses screws instead of push pins, unless I get rid of the HP case...

junkeymonkey · Jun 12, 2016

cant say that's part of using a prebuilt maybe some things proprietary and why we do custom builds and not prebuilts

arajigar · Jun 12, 2016

Mmmm, you're quite right. I was also thinking about changing the psu because the one that is already mounted (see pics) has no ventilation at all, while the modern ones have big 12 mm fans sucking hot air, which help reducing heat. Do you know if any modern non proprietary psu will fit on this pc case? :??:

junkeymonkey · Jun 12, 2016

psu looks to be proprietary as well??

http://www.tomshardware.com/forum/330071-28-power-supply-unit-dc7100-tower-model

thing is with a prebuilt is you buy it new use it up and throw it in trash go to wal mart and buy there latest to replace it they sell computers and don't really care about you doing any upgrading cause they sell whole computers upgrading hurts sales .. so???

all you can do id the best you can and hope for the best outcome keep spending good money on it just to find it don't quite work out or not or does ??

that's the name of that game with a prebuilt

good luck

arajigar · Jun 13, 2016

Ok, "use it, throw it", not a solution but thanks anyway.

junkeymonkey · Jun 13, 2016

true, but its back to its a prebuilt with proprietary parts and specs . so its hp way or no way unless you do a lot more modding or replace the board ?? just just how it can be with a prebuilt at times .. your stuck

arajigar · Jun 13, 2016

Sorry, I have been a bit ungrateful, because, in fact, the link you've provided has the solution to the psu problem. This morning I went to a local pc store with the hp's psu and its size is the one of an ATX psu, the only thing I have to do is drill two holes for the screws on the back right side of the case and I'm done. Thanks!

. Did you find more info about cpu coolers that use screws for mounting?

junkeymonkey · Jun 13, 2016

'' the only thing I have to do is drill two holes for the screws on the back right side of the case and I'm done. Thanks''

yup, just keep doing mod's and make it work

''Did you find more info about cpu coolers that use screws for mounting''

nope nothing at all not even at hp forums of guys wanting to do the same .. looks like another custom mod to be done on that as well

I still think your overall ambient room temp's are your biggest factor it like I sais you want to cool a part at 35c with air that's 30c ? not much to gain and why your idle temps are so high in my opinion your max temps aint so bad could be better but ???

my chip [ i5 4670] in this room not so hot and with A/C can still get up to 70/75c pounding on it with a cpu test or something cpu intensive

arajigar · Jun 13, 2016

Yes, the temperatures in Spain are crazy in summer, 47 degrees celsius last year on august were recorded on Sevilla and Caceres!!, anyway I'll see what I can do with the cpu cooler

junkeymonkey · Jun 13, 2016

well this model hp takes the same cooler as yours and heres whats said on that ??

''The problem with using an aftermarket socket LGA 771 heatsink/fan is that things above the standardized base may not physically fit in the space you have available in the xw8600. You'll have to experiment.''

http://h30434.www3.hp.com/t5/Business-PCs-Workstations-and-Point-of-Sale-Systems/Aftermarket-CPU-HeatSink-for-Quad-Core/td-p/5077719

hp may just got things ''fixed'' on that deal all tou can do is buy , try , mod and hope something works out it seems ??

''the temperatures in Spain are crazy in summer'' aint so cool around here they say its due to global warming ?

arajigar · Jun 13, 2016

aint so cool around here they say its due to global warming ?

No, it´s because my other system, an Athlon 1 Ghz that runs at 65 degrees just playing Quake 1

, I´m also searching a good replacement for its heatsink... :ange:

I have recently obtained a handheld circular saw, tomorrow I´ll try to cut the Dream i117´s heatsink, just the red marked parts:

After that I have to modify the mobo´s tray to get rid of the brackets and let the i117´s push pins be inserted and keeps all in place.

I´ll post photos of the results and also what temps I achieved finally. Cross fingers.

PS: the first photo of the dc7100 internals is identical to what my dc7100 looks like the first time I opened it!!!, HP´s guys mount everything the same way, are they robots or what?, even the zips are placed in the same place for god´s sake!!!

junkeymonkey · Jun 13, 2016

sounds like a plan good luck

''an Athlon 1 Ghz that runs at 65 degrees just playing Quake 1

, I´m also searching a good replacement for its heatsink.''

that cooler master I linked may fit

AMD FM2/FM1/AM3+/AM3/AM2/940/939/754 sockets

it uses the stock amd latch type hook up as well

arajigar · Jun 13, 2016

You're right again!, I'll look for it and see if it can make things run cooler

arajigar · Jun 14, 2016

Aaaargh!!, no luck!! the heatsink brackets are positioned in a different way, 5 or 6 mm afar from the Foxconn's brackets, so there's a lot of modding to do to make it stay put in case I mod the i117's brackets. I'll have to stick with Foxconn's heatsink...

junkeymonkey · Jun 14, 2016

that's the way the cookie crumbles some times .. and reasons why we don't use prebuilts and do custom builds that are full open atx spec

arajigar · Jun 14, 2016

Yes, but I'm still working on new ieeas to make the hs work better... I have thought even in putting another fan in a push-pull config, but the bloody Foxconn HS uses a 70 mm fan!!, I know it's testing me, pushing me to limits until I go postal and start using a hammer instead a screwdriver to fix all the system,haha!! (joker mode

n), anyway, seriously, I think I can do something about this particular thing, in fact (I have to do testings) I have done amod to the Athlon HS and put the i117's fan on it, so, why I cannot make something similar with this heatsink?. I'll do it this week and post the photos

.

junkeymonkey · Jun 15, 2016

you could just leave the side panel off and set a house room box fan pointing into it ? I've done that

arajigar · Jun 15, 2016

Ok!, I'll do that!!

junkeymonkey · Jun 15, 2016

like these ? lol.....

https://www.youtube.com/watch?v=d5_aRp-R_hA

[pic page 5]

http://www.sevenforums.com/pc-custom-builds-overclocking/211964-external-case-cooling-5.html

arajigar · Jun 15, 2016

oh, hahaha!!, no!!, something less primitive, something like an USB 300 mm 4000 rpm fan, something crazy, but it should work!, now i'm mounting the athlon rig, but the case is small and I have adquired another bigger one, so I first need to open new windows on it and re-build the frontal panel cutting and reallocating the power switch, the frontal audio panel, etc. Tomorrow I'll receive my new psu, then i can do testing sessions.

arajigar · Jun 17, 2016

Hi, It's a shame that I didn't take pics of it, but I've try just for fun the usb fan and it doesen't work so good, the temp drop was about 3 degrees, and the work involved in making it fit into the side panel and place all cables and adaptors into the case is insane, so, I think ir does not worth the effort. In the other handp, I've mounted the psu and I'm waiting an 8 mm fan to arrive (tacens anima, they're ultra quiet!!) then I'll take some pics of the system and what temps I did achieve.

Cpu cooler compatible with HP dc7100 motherboard

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