It's time for that thread again! Remember, post for fun, not for competition. Flagrant fanboyism and bullying comments will be removed! That said...
All-In-Ones
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Apple iMac G3 400 DV (Slot Loading - Fruit)
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CPU:
Motorola PowerPC 750 (G3) @ 400 MHz
RAM:
1 GB (2 × 512 MB) OWC DDR (PC100)
Storage:
SanDisk SSD Plus (120 GB)
Graphics:
ATI Rage 128 (8 MB SDRAM)
OS:
MacOS 9.2.2, MacOS X 10.4.12
Modern Desktops
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Aleph
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CPU:
AMD Ryzen 9 3950X @ 4.7 GHz
CPU Cooler:
Noctua NH-U12S chromax.Black
Motherboard:
ASUS Republic of Gamers Crosshair VI Extreme
RAM:
32 GB (4 × 8 GB) G.Skill Ripjaws V DDR4 3200 (PC4 25600)
Storage:
Western Digital Blue (2 TB SSD), Western Digital Black (6 TB 7200RPM)
Graphics:
NVIDIA Titan RTX (24 GB GDDR6)
Case:
Anidees AI Crystal (Black)
Power Supply:
Rosewill Lightning 1300W (80+ Gold)
OS:
Windows 11 Pro x64
Nemesis
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CPU:
AMD FX-3850 @ 4 GHz
CPU Cooler:
AMD Wraith Prism
Motherboard:
ASUS Republic of Gamers Crosshair V Formula-Z
RAM:
32 GB (4 × 8 GB) Mushkin Enhanced Blackline DDR3 1600 (PC3 12800)
Storage:
Samsung 850 Evo (250 GB), Western Digital Blue (1 TB 7200RPM)
Graphics:
NVIDIA Titan X (12 GB GDDR5) with Arctic Accelero Xtreme IV
Case:
NZXT Nemesis Elite (Black)
Power Supply:
Silverstone Strider Titanium 600W (80+ Titanium)
OS:
Windows Vista Ultimate x64 Service Pack 2
Phantom
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CPU:
AMD Ryzen 9 5950X @ 4.9 GHz
CPU Cooler:
Noctua NH-D15 chromax.Black
Motherboard:
ASUS ROG Crosshair VIII Dark Hero
RAM:
64 GB (4 × 16 GB) G.Skill Ripjaws V DDR4 3200 (PC4 25600)
Storage:
Western Digital Black SN850X (4 TB), Western Digital Black (10 TB 7200RPM)
Graphics:
Sapphire Nitro+ SE Radeon RX 5700 XT (8 GB GDDR6)
Case:
NZXT Phantom (Black)
Power Supply:
EVGA Supernova NEX650G 650W (80+ Gold)
OS:
Gentoo Linux x86_64
Xion
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CPU:
AMD Phenom II X6 1100T Black Edition @ 3.7 GHz
CPU Cooler:
AMD Wraith Prism
Motherboard:
ASUS Republic of Gamers Crosshair IV Formula
RAM:
32 GB (4 × 8 GB) Mushkin Enhanced Blackline DDR3 1600 (PC3 12800)
Storage:
Samsung 850 Evo (250 GB), Western Digital Blue (1 TB 7200RPM)
Graphics:
EVGA GeForce GTX Titan Superclocked (6 GB GDDR5)
Case:
Xion II XON-101 (Black)
Power Supply:
Silverstone Strider Titanium 600W (80+ Titanium)
OS:
Windows XP Media Center Edition Service Pack 3
Modern Laptops
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Apple MacBook Air (11-inch, Early 2015)
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CPU:
Intel Core i7-5650U @ 2.2 GHz
RAM:
8 GB (2 × 4 GB) Apple DDR3 1600
Storage:
Apple TS0256F (256 GB)
Graphics:
Intel HD Graphics 6000 (1.5 GB Shared Memory)
OS:
MacOS 10.14.6
Samsung Chromebook XE303C12
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CPU:
Samsung Exynos 5250 @ 1.7 GHz
RAM:
2 GB DDR3L
Storage:
16 GB SSD
Graphics:
ARM Mali-T604 (Shared Memory)
OS:
Debian Sid
Retro Desktops
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486 Build
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CPU:
AMD 5x86 @ 133 MHz
CPU Cooler:
EverCool EC-486
Motherboard:
Asus PVI-486SP3
RAM:
128 MB (2 × 64 MB) MemoryMasters FPM SIMM (60 ns)
Storage:
SanDisk SSD Plus (120 GB)
Graphics:
3DFX Voodoo Banshee (16 MB SDR)
Case:
DIYPC Vanguard-V6-RGB Black
Power Supply:
Antec Earthwatts EA-500D
OS:
Windows for Workgroups 3.11
Athlon XP Build
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CPU:
AMD Athlon XP 2800+ @ 2.083 GHz
CPU Cooler:
ZALMAN CNPS7000B-Cu LED
Motherboard:
ASUS A7V8X-X
RAM:
2 GB (2 × 1 GB) Samsung DDR 400 (PC3200)
Storage:
SanDisk SSD Plus (120 GB)
Graphics:
BFG Technologies NVIDIA GeForce FX 5600 (256 MB DDR)
Case:
DIYPC Crystal-P3-RGB
Power Supply:
CoolMax V-500 500W
OS:
Windows 98 Second Edition Unofficial Service Pack 3.53
Apple Power Macintosh G3
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CPU:
Sonnet Technologies Encore G4 @ 1 GHz
CPU Cooler:
Stock with 2 × Noctua NF-A4x10 FLX
Motherboard:
Apple 820-0897-A
RAM:
1 GB (4 × 256 MB) A-Tech SDRAM (PC133)
Storage:
SanDisk SSD Plus (120 GB)
Graphics:
ATI Rage 128 GL (16MB SDRAM)
Case:
Apple PowerMac G3 (Blue & White)
Power Supply:
Antec Earthwatts EA-500D
OS:
MacOS 9.2.2, MacOS X 10.4.12
Slot 1 Build
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CPU:
Intel Pentium III SL52R @ 1GHz
CPU Cooler:
Thermaltake Golden Orb
Motherboard:
ASUS P2-99
RAM:
512 MB (2 × 256 MB) A-Tech SDRAM (PC133)
Storage:
SanDisk SSD Plus (120 GB)
Graphics:
3dfx Voodoo5 5500 AGP (64 MB DDR)
Case:
DIYPC DIY-Line-RGB Black
Power Supply:
Antec Earthwatts EA-500D
OS:
Windows 98lite Professional v4.7
Slot A Build
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CPU:
AMD Athlon K7100MNR53B A @ 1GHz
CPU Cooler:
K7 Slot-A CPU Dual Fan Cooler
Motherboard:
ASUS K7M
RAM:
512 MB (2 × 256 MB) A-Tech SDRAM (PC133)
Storage:
SanDisk SSD Plus (120 GB)
Graphics:
3dfx Voodoo5 5500 AGP (64 MB DDR)
Case:
DIYPC DIY-Model S-RGB Black
Power Supply:
Antec Earthwatts EA-500D
OS:
Windows 98lite Professional v4.7
Socket 370 Build
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CPU:
Intel Pentium III-S SL5XL @ 1.4 GHz
CPU Cooler:
Thermaltake Golden Orb
Motherboard:
Compaq TR100 (A03)
RAM:
512 MB (2 × 256 MB) A-Tech SDRAM (PC133)
Storage:
SanDisk SSD Plus (120 GB)
Graphics:
3dfx Voodoo5 5500 AGP (64 MB DDR)
Case:
DIYPC C-RGB Black
Power Supply:
Antec Earthwatts EA-500D
OS:
Windows 98lite Professional v4.7
Xaero
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CPU:
AMD Phenom II X2 560 @ 3.3 GHz
CPU Cooler:
Cooler Master Hyper N520
Motherboard:
ASRock AM2NF3-VSTA
RAM:
2 GB (2 × 1 GB) Kingston KVR DDR2 800 (PC2 6400)
Storage:
Kingston HyperX 3K SH103S3 (120 GB)
Graphics:
ATI Radeon X850 XT (256 MB DDR)
Case:
DIYPC VII-BK-ARGB
Power Supply:
Antec Earthwatts EA-500D
OS:
Windows 98 Second Edition Unofficial Service Pack 3.53
Y2K
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CPU:
Intel Core 2 Duo E8600 @ 3.33 GHz
CPU Cooler:
Zalman CNPS9500
Motherboard:
Gigabyte GA-G31M-ES2L (rev. 2.4)
RAM:
4 GB (2 × 2 GB) Kingston KVR DDR2 800 (PC2 6400)
Storage:
Kingston A400 (120 GB)
Graphics:
BFG Tech GeForce 7800GT (256 MB GDDR3)
Case:
Alienware Aurora R4
Power Supply:
Antec Earthwatts EA-500D (80+ Bronze)
OS:
Windows 2000lite
Retro Laptops
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Apple iBook G3 (Clamshell)
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CPU:
Motorola PowerPC 750 (G3) @ 300 MHz
RAM:
64 MB Onboard, 1 × 512 MB OWC DDR (PC100)
Storage:
Zheino mSATA SSD (120 GB)
Graphics:
ATI Rage Mobility (4 MB SDRAM)
OS:
MacOS 9.2.2, MacOS X 10.4.6
IBM ThinkPad 390X
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CPU:
Intel Pentium III @ 500 MHz
RAM:
512 MB (2 × 256 MB) DDR (PC100)
Storage:
Zheino mSATA SSD (120 GB)
Graphics:
NeoMagic MagicMedia 256AV (2.5 MB SDRAM)
OS:
Windows 98lite Professional v4.7
Servers
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Xserve (Early 2009)
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CPU:
2 × Intel Xeon W3540 @ 2.93 GHz
CPU Cooler:
2 × Stock
RAM:
96 GB (12 × 8 GB) DDR3 1066 (PC3 8500)
Storage:
3 × Seagate ST2000NM0001 2 TB (7200 RPM)
Graphics:
EVGA GeForce GTX Titan Superclocked (6 GB GDDR5)
OS:
MacOS 10.14.6
I'll fill in more later...