Nubia Z70 Ultra PC Mod Exposes Smartphone Cooling Limits

Nubia Z70 Ultra PC Mod Exposes Smartphone Cooling Limits

August 17, 2026

WARSAW, August 17, 2026, 04:08 CEST

  • A custom Nubia Z70 Ultra rig reported 99% stability across 20 graphics stress-test loops.
  • The creator reported 20–30 frames per second in The Witcher 3 at 1080p Ultra.

A hardware modder has converted ZTE’s (HKG:0763) Nubia Z70 Ultra into a desktop-style computer. Two full-size CPU coolers clamp the phone’s mainboard inside an acrylic case. The result highlights heat, not only silicon, as a limit on sustained phone performance.

The creator, who uses the name ntsow, reported 99% stability in a 20-loop graphics test. The best and worst loop scores differed by 70 points. That narrow spread matters more than a short peak score.

The experiment asks a blunt question. “How far can I push a smartphone if I stop treating it like a smartphone?” ntsow wrote. The answer required removing most qualities that make a phone portable.

FeatureRetail Nubia Z70 UltraCustom desktop rig
Form164.3 × 77.1 × 8.6mm; 228gAcrylic desktop enclosure; dimensions and weight not disclosed
CoolingFactory phone coolingTwo full-size desktop CPU coolers
DisplayIntegrated 6.85-inch AMOLEDOriginal panel moved to the case front
Cameras and mobile hardwareThree rear cameras and dual-SIM connectivityCamera and mobile-network hardware removed
Primary useHandheld Android phoneDesktop Linux and local PC-game experiment
Retail specifications come from Nubia; modification details come from the builder and technical coverage.

The phone uses Qualcomm’s (NASDAQ:QCOM) Snapdragon 8 Elite. Its prime CPU cores run at up to 4.32GHz. Nubia sells configurations reaching 24GB of LPDDR5X memory and 1TB of UFS 4.0 storage.

Creator-reported 3DMark resultMeasurement
Wild Life Extreme stress-test loops20
Best loop6,980
Lowest loop6,910
Best-to-lowest spread70 points
Reported stability99%
Separate ranking screenshot10,533
These figures were published by the builder and have not been independently reproduced.

The cooler plates cover the main components directly. This gives the chip more thermal headroom than an 8.6mm handset body. Tom’s Hardware said the rig’s sustained performance was more notable than its ranking score.

The mod also ran The Witcher 3 through several software layers. The creator reported about 20–30 frames per second at 1920×1080 using the Ultra preset. Some scenes exceeded 30 frames per second.

Gaming workloadCreator-reported setting or result
GameThe Witcher 3
Resolution1920 × 1080
Graphics presetUltra
Frame rateApproximately 20–30 fps
GPU useApproximately 99%
Best observed scenesSlightly above 30 fps
The builder disclosed no standardized frame-time capture or independent validation.

This is not Windows running natively. Android remains the host operating system. A Termux environment runs the XFCE4 Linux desktop, while compatibility tools translate Windows applications and games.

Software layerRole in the rig
AndroidHost operating system
Termux plus XFCE4Linux desktop environment
Turnip and VulkanHardware-accelerated graphics path
Wine, Box64 and HangoverWindows and x86 application compatibility
GameNativeAdditional local game-running path
The stack keeps Android functional while adding desktop and compatibility layers.

The project does not prove that a phone can replace a current gaming PC. Its 20–30 fps result is modest. The acrylic case, external peripherals and oversized coolers also remove portability.

It does show why sustained tests matter. Thin devices often deliver strong short benchmarks, then reduce clocks as heat builds. Larger cooling systems can preserve performance, but they impose size, noise and power costs.

Risks: The results come from one custom build and remain creator-reported. Power draw, component temperatures and frame-time consistency were not fully disclosed. Direct comparisons with retail phones or PCs would therefore be premature.

BEZ KABLI • EXTENDED COVERAGE

Further analysis

What did the builder change in the Nubia Z70 Ultra?
The phone's main hardware was mounted between two full-size desktop CPU coolers. Its display moved to the front of a custom acrylic enclosure. Camera and mobile-network hardware were removed, turning the handset into a stationary computer.
How stable was the modified phone?
The creator reported 99% stability across 20 loops of the 3DMark Wild Life Extreme stress test. The best loop scored 6,980 and the lowest scored 6,910. That is a 70-point spread.
Can the rig really run The Witcher 3?
Yes, according to the builder. The game reportedly ran at 1920×1080 using the Ultra preset, usually producing 20–30 frames per second. GPU use was about 99%. These results have not been independently reproduced.
Is Windows running natively on the phone?
No. Android remains the host operating system. Termux and XFCE4 provide a Linux desktop, while Wine, Box64 and Hangover help run Windows applications and games through compatibility layers.
Does this prove that a smartphone can replace a gaming PC?
No. The rig is large, stationary and heavily modified. Its gaming performance is also modest by current PC standards. The useful finding is narrower: extra cooling can make a mobile chip sustain performance more consistently.

Mateusz Brzeziński

Mateusz Brzeziński is a financial and technology journalist at Bez-kabli.pl, covering stocks, artificial intelligence, semiconductors and global market developments. He graduated from the Prague University of Economics and Business in the Czech Republic and previously worked in financial analysis before moving into business journalism. His reporting focuses on the companies, technologies and market trends shaping the global economy.