Inspiron 3650, upgrading cooling capacity

That processor should really have Liquid-Cooling, so I would work toward that solution.

I have nearly identical components in my 3650 ( Zotac 1080ti mini, Corsair sfx 600w power supply) with a few extras ( 2 4tb 2.5 inch hard drives and a 8tb 3.5 inch hard drive, 7 port USB 3.0 pci card). 

The cpu temperature increase is coming from one component, the 1080ti. Going from a 1050 ti mini to a 1080ti mini had my cpu hitting 100 degrees on 2 games, Forza Horizon 3 and Final Fantasy XV. 

Cooling this case became my new mission. 3 goals: direct cpu cooling, ventilation,  and air flow.  

Direct cpu cooling: I've tried closed loop water coolers but there is simply not enough room in the case. The best low profile cooler is the Reeves Brontes cooler on Newegg for $30 paired with Arctic MX4 thermal paste.

Airflow: General rule = heat rises. So airflow in the case should be front to back and bottom to top. I installed 80mm Silentx Fan ($7) in the interior front of the using the standard rubber vibration insulators instead of the fan screws. I installed an Antec PCI slot fan exhaust ($10 @ frys,  newegg, or amazon) in the bracket slot above the GPU, and another 80mm silenx fan ($7) at the back of the case. 

Extra only if you are comfortable:

Though I've never modded a case I picked up a Dremel 4000 ($80 at the local Home Depot) and a $3 double pack of 1/8 drill bits. From there I put masking tape on the top of the case, placing an 80mm fan on top of it. Then using a pencil I drew an outline of the fan, and drew circles in the fan's screw holes. Finally I moved the fan aside and drew a ton of dots within that area where I wanted the ventilation fan holes to be.

After removing  the cpu cooler, gpu, and pci cards, get a plastic shopping bag and tuck it behind the motherboard so that it lays over the computer internals. That way the drilling debris won't land on your parts. 

Now begin drilling through the tape/case.  It may take a few attempts to perfect your technique to create holes, so my suggestion is to start at the center and work your way outward.  Once you feel comfortable with your technique immediately drill the 4 screw holes before finishing the ventilation holes. Once you finish the ventilation holes you may have to go back and make them bigger (about the size of the screw holes).

After that remove the tape. There may be a little paint scratching from your initial drill attempts but no worries.  I picked up a 80mm black metal dust cover ($6 on amazon) and a 80mm Noctua fan and we are all done after installation. As a first time case modder the drilling took about a hour and a half.

Current temps 35 idle and 75 max in gaming. No longer seeing 90+ temps.

How did you install a new PSU in the 3668? Did it fit or did you have to custom-fab it?

Also, do you think this card would fit? It's a single fan. 

https://m.newegg.com/products/N82E16814487261?&ignorebbr=true&source=googleshopping&nm_mc=KNC-GoogleAdwords-Mobile&cm_mmc=KNC-GoogleAdwords-Mobile-_-pla-_-Video+Card+-+Nvidia-_-N82E16814487261&gclid=CjwKCAiA9K3gBRA4EiwACEhFezvA0daOZm2Umirsxj9qnif_ep23hUpunMFm7sYE9TtrAXwT4OGlwxoCIZYQAvD_BwE&gclsrc=aw.ds

Hi frankie,

The power supply is the easiest part of the upgrade.

You need 3 parts: sfx power supply, double sided heavy duty tape, and an 8 to 24 pin connector for Dell motherboards. 

Here is the power supply I used: https://www.newegg.com/Product/Product.aspx?Item=N82E16817139155 .

The screw holes won't line up when you try to install the power supply. Here is the 30 second solution.

Go to Walmart and find the aisle where the mirrors are. There is a double sided tape used to hang mirrors on that aisle, usually with green and white designed paper covering the adhesive. Target has it for less than $3 here:

 https://www.target.com/p/scotch-174-permanent-mounting-tape-1-x-50-1ct/-/A-14792269?ref=tgt_adv_XS000000&AFID=google_pla_df&fndsrc=tgtao&CPNG=PLA_Electronics%2BShopping&adgroup=SC_Electronics&LID=700000001170770pgs&network=g&device=c&location=9031089&gclsrc=aw.ds&ds_rl=1246978&ds_rl=1248099&ds_rl=1246978&ref=tgt_adv_XS000000&AFID=google_pla_df&CPNG=PLA_Electronics+Shopping&adgroup=SC_Electronics&LID=700000001170770pgs&network=g&device=c&location=9031089&gclid=Cj0KCQiAurjgBRCqARIsAD09sg-d2zr-HVfjS1pZuB47lCtiT5ApbNEts47KAXfgI-DverWvLkI13RsaAondEALw_wcB&gclsrc=aw.ds .

Hold the new power supply in the case and line it up with the hole, fan facing up. It should be a finger's height above the bottom of the case. Take note of where the power supply contacts the rear of the case and metal part of the case under the motherboard. Apply the tape to the power supply in those areas and firmly push the it into contact inside the case. This permanent tape is rock solid even after 24hr operation over a year. 

Last piece is the 8 to 24 pin adapter for Dell's motherboards: I brought this one back in 2017 for around $10. 

https://www.amazon.com/gp/product/B01K68TLP0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Attach to power supply and motherboard and you have nearly tripled your power supply wattage in about 2 minutes of install work. 

With a mini 1060 upgrade you will be fine. I maxed mine out with a Zotac Mini 1080 Ti and that's when heat became an issue to my CPU and had to seek out better a better CPU cooler and case airflow. That worked out and now my system is at 39 degrees idle, 65 while gaming, and 85 max on the most strenuous games.

What upgrades did you do to improve cooling?

The built-in wireless was to slow for me to stream HD video to my other network computers , and my Netgear AC1200 USB 3.0 adapter would randomly disconnect with the driver issues so I also maxed out the wireless adapter/bluetooth as well with this: https://www.amazon.com/gp/product/B079QH5KW1/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Not a single disconnect since my May 2018 purchase and video stream/ downloads are as flawless as the Netgear. 

Hello, Kudos to you for upgrading that ! But other than that..I must ask, did you have problems with your PSU? like is that ATX or SFX? I must ask because I can't help it, but I am having troubles, because I have a GTX 750 TI with a 6pin in it and I had bought a ATX power supply but apparently it was wrong due to the 6pins? I don't really know honestly, so I wanted help in fighting a good Power Supply and just overall figuring it out, as I could tell you had what looks to me like a 8pin on your gpu? so I'd love to talk about this and clear up some stuff in this mind of mine.

The corsair 600w sfx power supply has a couple of 8 pin connectors for the 1080ti I am using, so my recommendation would be that particular power supply. I purchased the 1080ti back in the beginning of 2018 from ebay for $600 new and after improving the cooling of the system I haven't had a single problem in over a year, and that's with 24/7 operation. I never turn the system off unless I am blowing dust out every 3 months. 

how do i connect multiple fans

You can Tell me how connect multiple fan 

do you have any suggestions for a power supply to support an rx560 or gtx 1050?

i GOT A FULL SIZE 970 CARD TO FIT IN MINE.. WITH SOME MINOR CASE MODIFICASTION I