Purchased for roughly $40 (around 1,700 Ukrainian Hryvnia), YouTuber LastComputer took a chance on a Samsung Galaxy S23 that looked like it had been run over by multiple cars. Beyond a shattered display and a warped motherboard, the device was also SIM locked.
Figure: The crushed Galaxy S23 before the mod. Source: Hackaday (LastComputer YouTube channel)
Unlocking a Full-Throttle Snapdragon 8 Gen 2 for $40
Faced with such catastrophic damage, the standard move is stripping the device for spare parts. LastComputer chose a far more audacious route: gently whacking the bent frame back into shape with a hammer and installing a fresh battery, as the motherboard refuses to boot without one.
Against all odds, the board powered up, bringing the salvaged Qualcomm Snapdragon 8 Gen 2 silicon back to life. On secondhand marketplaces, smashed flagship phones are effectively steeply discounted premium silicon. Once you bypass cellular carrier restrictions and screen dependencies, that mobile board has more than enough power to anchor a desktop rig.
Active Cooling Shaves Off 7°C to Tame Thermal Throttling
Thermal dissipation has always been the primary bottleneck of mobile form factors. To break free from passive cooling constraints, the back glass was removed. A custom heatsink was bonded directly to the vapor chamber using thermal adhesive, paired with a dedicated cooling fan.
Figure: The completed build featuring active cooling and USB expansion. Source: Hackaday (LastComputer YouTube channel)
The hardware was housed within a custom 3D-printed enclosure attached to a 512 GB SSD bracket. Dual USB hubs handle peripherals and output an HDMI video feed to an external monitor. Real-world testing revealed that active cooling slashed full-load temperatures by around 7 degrees Celsius. With thermal throttling significantly mitigated, sustained performance jumped dramatically.
Samsung DeX Unleashes Shackled Desktop Performance
With the hardware re-engineered, Samsung DeX handles the software environment. In this desktop interface, the phone hardware reveals astonishing computing potential.
The rig easily handles emulation, running God of War via a PS2 emulator at full speed alongside Dolphin for GameCube titles. It also leverages the GameHub app to run select PC games from Steam and GOG. Stripped of restrictive mobile thermal and power limits, the mobile chip boldly encroaches on traditional desktop territory.
Re-Evaluating Idle Mobile Compute Power
For the same $50 budget, the used PC market typically offers aging desktop towers like an off-lease Dell OptiPlex equipped with a 2014-era Intel Core i5-4590. Compared to that aging desktop processor, the Snapdragon 8 Gen 2 delivers vastly superior graphics capability and efficiency.
The build highlights a hardware reality that is frequently overlooked: the theoretical computing power of modern smartphone chips has long outstripped handheld tasks. With just $40 and a hammer, modders can tap into discarded flagship silicon, turning electronic scrap into a surprisingly capable mini gaming PC.
Reference Links:
- Hackaday Coverage
