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Skyreach 4 mini, i5-8400, 1080 mini

by char_eric


Part List View full price breakdown


Date Published

Nov. 9, 2018

Date Built

Nov. 6, 2018

CPU Clock Rate

2.8 GHz

GPU Core Clock Rate

1.62 GHz

GPU Effective Memory Clock Rate

10 GHz


Brain dump:

I built this machine mainly for gaming (VR as well) with portability in mind. I'd never built a computer before and have a lot of thanks to the SFF community for all the recommendations. Also, massive props to the creator of the S4 Mini, Josh Sniffen. The guy is an amazing engineer/designer/creative/person and has incredible videos on a lot of things SFF.

After completing, I'm extremely happy with the build! Stock, the 1080 mini had a slight coil whine (which may be more noticeable with the S4 Mini) but I was able to to undervolt the GPU following this youtube video and the whine is now practically inaudible!

I wasn't expecting the 330w power brick to be so massive.. definitely makes me consider doing a brickless build but I prefer the extra power of the 1080 vs. a 1050ti.

Edit: also, thanks r/sffpc for the tips!

Part Reviews

Video Card

Stock has a slight coil whine but appears to be remediable by undervolting.

Comments Sorted by:

MiggityMiner 1 point 12 days ago

wow, that's a tight fit. Nice work! Would be interested to see your temps at load

char_eric submitter 1 Build 1 point 11 days ago

Sure, and thanks! I'll get some more build pics up and benchmarking details.

LilSalmon 1 Build 1 point 12 days ago

Great build dude, motherboard LED's look great peeking through and always good to see more SFF builds around!

char_eric submitter 1 Build 1 point 11 days ago

Thanks! And yeah, I really like the stock MoBo LEDs. Thinking I may look into syncing up the power LED if possible too

EliteKid104 1 Build 1 point 12 days ago

Slick build. As an owner of S4M-C and S4M, Skyreach is the easiest case that I ever build in. I'm also a huge fan of Josh myself, he helps me mods the case and a very delicate dude. Sadly many have stolen his layout /ideas and attacked him with fraudulent lawsuits.

char_eric submitter 1 Build 1 point 11 days ago

Ughh that's terrible to hear. I haven't had any direct communications with him but have seen him in practically every SFF thream possible... he's a legend

Judespace 1 point 11 days ago

How did you fit the 1080? I thought the s4 mini was too small for that ZOTAC 1080.

char_eric submitter 1 Build 1 point 11 days ago

You should be pleased to hear that you are mistaken! You're probably thinking of the s4 mini classic (S4MC) which required some extra modding to fit the 1080. The S4 Mini (S4M) that I have comfortably fits the 1080. You can see Josh talking about the difference here.

Judespace 2 points 11 days ago

No idea they made a new case, I’ll have to check it out now.

deathraydave 2 Builds 1 point 11 days ago

How hard was it?

char_eric submitter 1 Build 1 point 11 days ago

Not hard at all really. The biggest trouble I had was testing all the hardware worked. I couldn't get it to boot but then realized that the RAM wasn't properly connected (sigh).

Getting the GPU connected to the MoBo was a bit tricky but ultimately not too bad. I think I stripped a screw, removing the case so I'd forewarn to be careful doing that. Otherwise, pretty straightforward :)

DFCMesmer 1 Build 1 point 11 days ago

The smallest build I've done was a Shuttle, and that was challenging enough to find parts that would fit. This build is incredible - very well done. Did you know that all the parts would fit, or was there some trial and error? Re the coil whine, mine was caused by the PSU. Changing the aging Antec to an EVGA 80+ Gold cured it. I'd not come across the undervoltage method before, so thanks for referring to it in your description - I'll take a look.

char_eric submitter 1 Build 2 points 11 days ago

(edit: ugh my comment was truncated -_- wth pcpartpicker...)

Thanks for the compliment :)

I "knew" that the parts would fit based on my research but tbh was a bit concerned after I saw how big the 1080 was. There was a slight bit of manipulation getting the GPU connected to the MoBo but overall it was pretty easy.

Yeah, I'd heard the PSU could be the cause of coil whine but it seemed to only occur when I started to game (under load) and thus I concluded that it was the GPU. It could have been a combo of the PSU + GPU (under load) but ¯(ツ)/¯. Plus the HDPlex400 + 330W power brick were sort of deal breakers for this build so not much I could have really done there if that was the cause. Glad to help out with the undervolt method as well. I was surprised how easy and effective that was :D

Socialkonstruct 4 Builds 1 point 11 days ago

I really need to do a build like this but with only AMD parts.

char_eric submitter 1 Build 1 point 11 days ago

You should! I was seriously considering AMD but went intel since I have a gsync monitor ¯_(ツ)_/¯

You can check out my reddit post for AMD recs (forgot to add that to this build as a resource).

Upgrade 8 Builds 1 point 10 days ago

Nice build!

char_eric submitter 1 Build 1 point 10 days ago


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