PC with entirely passive cooling possible?

[Rationale]

As mentioned, would it be safe to build a lowish end gaming PC with entirely passive cooling and no case fans, or would it overheat, specifically the CPU and video card? I'm not going to build anything like this because fans didn't murder my family, I'm just wondering if it's possible.

For example...

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Pentium G3420 3.2GHz Dual-Core Processor ($69.99 @ Amazon)
Motherboard: ASRock H81M-ITX Mini ITX LGA1150 Motherboard ($59.99 @ Newegg)
Memory: G.Skill Sniper Low Voltage Series 8GB (2 x 4GB) DDR3-1600 Memory ($84.99 @ Newegg)
Storage: Western Digital Caviar Green 500GB 3.5" 5400RPM Internal Hard Drive ($58.95 @ Newegg)
Case: Fractal Design Node 304 Mini ITX Tower Case ($89.56 @ Mwave)
Power Supply: SeaSonic X Series 400W 80+ Platinum Certified Fully-Modular ATX Power Supply ($119.99 @ Amazon)
Other: Dynatron R8 CPU Cooler ($29.99)
Other: SAPPHIRE ULTIMATE R7 250 1GB GDDR5 ($94.99)
Total: $608.45
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-08 19:35 EDT-0400)

 

[geofelt]

Without SOME airflow, you will overheat.

But... you can build a decent pc that is all but inaudible.

A great source for quiet computing is www.silentpcreview.com.

 

[Eduello]

It'd possibly work if you put it on a test bench like this: http://www.pcper.com/images/reviews/906/icon1.jpg

Also, you should get a big heatsink for the CPU and a passively cooled GPU (disabling the iGPU will make the CPU generate less heat.)

 

[DonQuixoteMC]

If you've got an HDD in the computer you might as well have fans.

For as quiet an experience as possible, get an SSD with some incredibly quiet case fans and passively cool everything else.

Example:

SSD
NH-D14 -Heatsink passively cools CPU, fans go around the case for airflow

 

[Florian_2]

For anyone who drops in later than the original post, you can in fact build a totally passive system.
Check this website: http://www.hd-plex.com/

requirements are:
ITX board for ATX power supply, mATX board for SFF PSU
CPU with max 95 TDP
GPU with max 105 TDP (GTX 950/ 750ti)
Passively cooled PSU, u can buy theirs if u wish but there are some quiet/really good ones out there too
And the best is ofcourse an SSD for utter silence

I also recommend some building experience since it was not easy to build. Happy quiet to you!