Dell Optiplex 755 CPU upgrade

ayylmayonnaise · Nov 3, 2016

I have an old Dell Optiplex 755 and I'm looking to upgrade the cpu in it. I picked out a 3.0Ghz Core2 Quad, but as it stands the inside of the machine already gets rather hot, So i'd like to add a thermaltake fansink. My question is, Is there room to add it, what with all of the plastic to push the air around (a waste of plastic if you ask me)?

chemmajorp53 · Nov 3, 2016

Do you have the heatsink with the copper pipe? I have Q6600's in multiple SFF optiplex 755s and they're perfectly fine. Which form factor are you on?

ayylmayonnaise · Nov 3, 2016

I have a mini tower

ayylmayonnaise · Nov 3, 2016

My problem is the plastic, I can't tell if a simple fansink would fit
http://i.imgur.com/8jTIXb5.jpg

Here's what the original looks like: http://www.stuartconnections.com/6047-thickbox/Dell-CPU-Heatsink-wShroud-for-Optiplex-755-760-780-MT-HR004-W5685.jpg

The heatsink I want to put in it: https://www.amazon.com/Thermaltake-CL-P0497-Intel-Heatsink-Fan/dp/B001CCGYU0/ref=sr_1_24?s=electronics&ie=UTF8&qid=1478183977&sr=1-24&keywords=thermaltake+cooler

chemmajorp53 · Nov 3, 2016

ayylmayonnaise :

Dell uses BTX motherboards that you can't really fit aftermarket parts to, I'd just buy a used heatsink on ebay for the mini tower as it will be more than adequate for a 95W quad core that's not overclocked. Here's an example, try to find a cheaper one.

http://www.ebay.com/itm/Dell-CPU-Heatsink-Optiplex-GX620-330-740-745-755-E521-J9761-D9729-Mini-Tower-OEM-/231329739395?hash=item35dc53b283:g:QEcAAOSwVFlUEKgS

ayylmayonnaise · Nov 3, 2016

I'm not able to use ebay here, but: Okay, so no new fansink. From what I can tell the fan with the ugly plastic shroud is a separate piece from the heatsink, which seems to be as you said a passive sink. What I could do is remove theplastic fan shroud and the fan, put a new case fan in the front of it, and as you said just get another passive heatsink. Is this a good idea? I'd really like to do away with the old fan, and go for something quieter

ayylmayonnaise · Nov 3, 2016

https://www.youtube.com/watch?v=XCbTqWgM9L0

Like this person has done. (i am not able to watch the video either, but the thumbnail is exactly what i'm talking about)

chemmajorp53 · Nov 3, 2016

The fan is a separate piece and you can replace it, but the problem with your cooling is the aluminum heatsink, not the fan. Do you have any old computer parts stores that you can scrounge around to try and find one with the copper pipes?

ayylmayonnaise · Nov 3, 2016

Not exactly. There's a goodwill outlet store that has parts, but the only thing they seem to have a selection of are as-is broken laptops and badly stored PCI cards (all in a pile, no static shielding)

chemmajorp53 · Nov 3, 2016

ayylmayonnaise :

IDK then, your best bet is definitely finding the OEM copper part though

ayylmayonnaise · Nov 3, 2016

Alright. How much of a difference is there in the heatsinks? I could just pick up a regular passive heatsink just a bit bigger than the original one and leave the fan as is (or replace it, too), right?

chemmajorp53 · Nov 3, 2016

ayylmayonnaise :

You could but you're gonna have to jerry rig it to actually make decent contact with the cpu. The difference between the 2 OEM heatsinks is pretty massive FWIW.

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