Well, why not?
PC 1 - that's my NAS:
mobo: ASUS P8H77-I (miniITX LGA1155 board)
case: Lian-Li Q25-B case
processor: Intel Core i7-2600K, undervolted and underclocked, effectively limited to ~30W TDP
cooling: Thermalright AXP-140 without a fan
ram: 2x 8 GB DDR3/1600 MHz CL9 A-Data
power supply: Be Quiet Dark Power Pro II 1200W (what a mouthful, but crappy psu)
EVGA GTX 570 with stock (blower-type) cooler
ssd: 2x intel 507 48GB SSD (these are ES - engineering samples, don't bother looking for them, also SLC), Raid-1
hdd: 4x Seagate 2 TB 5900 rpm disks
tons of custom made cables, to allow as much air as possible to circulate around the cramped case
Enermax TB.Silence 140 and 120mm fans
PC 2: under TV, streaming machine:
mobo: ASRock Q1900-ITX with Celeron J1900
ram: 2x 4 GB DDR3/1333 MHz CL7 Kingston
disk: Intel 335 60GB SSD
case: Proton ITX
network card: Intel Wireless-AC 7260+bluetooth
optical: NEC optiarc blue-ray writer drive
video card: low profile pci-e hdmi grabber (it works with internally wired hdmi, since the case have no pci card slot, it barely sticks out of pci-e slot)
power supply: FSP Group 12V/5A power brick + ATX splitter/pwm controller
output: LG 50" TV
input: Rapoo E6700 wireless keyboard with trackpad
PC totals at 21W when burning discs. That PSU is overkill.
PC3: work-on-the-go laptop:
base: HP 4330s
processor: Intel Core i7-2820QM
ram: 2x 8 GB DDR3/1600 MHz CL9 Kingston
ssd: 2x Crucial MX-100 240GB, one in adapter tucked in optical bay
network card: Intel 7260-AC
nothing more I could change in this machine, no 1080p screen replacement - stupid HP doesn't make dual channel LVDS cables for this model
PC4: workstation/gaming:
mobo: ASUS P8P67 Deluxe
processor: Intel Core i7-2600K, overclocked to 5.0 (summer) and 5.2 GHz (winter)
ram: 4x 8 GB DDR3/1600 MHz CL9 Kingston Hyper X
graphics: Palit & PNY GeForce GTX 970 (both sporting 3x miniDP), sadly both cards are not overclockable due to poor power delivery ciruitry
cooling: Koolance CPU-360 block, EK slipstream 360 radiator, 2x Laing D5 water pumps in series and Alphacool 5.25" double bay reservoir. Dual pumps for redundancy, since with that pumping power if I set them to fast (say 3/5 or more), liquid starts to cavitate on cpu block, and Laings are extremely quiet, so I wouldn't hear if one failed. 3x Enermax Magma 120mm fans on the radiator, running ~400 rpms
case: Cooler Master Cosmos S + Bitfenix 220mm Spectre fan
power supply: server-grade Chicony 1000 W (It's Delta probably, pulled from actual server, it's super quiet, and up to 400W runs passively, which accounts for 95% of time)
audio card: ASUS Xonar XD/DX PCIe audio card
monitors: 3x DELL U2412M 1200p IPS
amp + speakers: Radmor 5102 + 2x Unitra Tonsil Altus 110
controller: no-name PCIe 4x SATA storage controller on J-Micron chip
ssd: 2x Intel 510 120GB, 2x Intel 520 120GB, 2x Kingston V300 120GB, 1x Crucial MX100 120 GB, 1x Samsung 820 Pro 120GB, 1x Samsung 830 120GB, 1x A-Data Premier 120GB, 1x Transcend 64GB SSD (I never bothered to pull it out, since it's tucked behind motherboard)
optical drive: NEC slim Optiarc Bluray writer
input: CM Storm Mech mechanical keyboard (I love macro keys!)
mouse: no-name. I refuse to buy crap for right-handed tyrranists, so until decent mouse for lefties happens I'm stuck with this. And Razer is not a decent mouse, in fact they produce such crap it pains me - I know, I tried.
When I swapped all disks to ssds, the quietness was overwhelming. NAS went into storage room, so only thing that's making any noise is mechanical keyboard and PSU when approaching peak power. It pulls max 610W from the socket, so I think it will serve me for years.