Overview
Volume Shader BM and WhatCable are two specialized tools that address very different needs in the tech ecosystem. Volume Shader BM is a professional-grade GPU benchmarking tool that runs in your browser using WebGL, providing detailed performance metrics like frame rates, shader performance, and temperature monitoring. It is designed for gamers, content creators, IT professionals, and overclockers who need to test and optimize graphics card performance.
WhatCable, on the other hand, is a macOS utility that decodes USB-C cable capabilities and charging diagnostics. It reads the USB Power Delivery data that macOS already exposes and translates it into plain English, helping users understand why a cable charges slowly or fails to drive a display. It is free and open source, with a Pro version offering advanced features.
Feature Comparison
| Feature | Volume Shader BM | WhatCable |
|---|---|---|
| Primary Function | GPU benchmarking and stress testing | USB-C cable diagnostics and charging analysis |
| Platform | Web browser (WebGL) | macOS menu bar app and CLI (Apple Silicon) |
| Target Users | Gamers, content creators, IT pros, overclockers | Mac users troubleshooting charging or cable issues |
| Key Metrics | Frame rates, shader performance, temperature, GPU utilization | Cable speed, charging power, e-marker data, PD contract |
| Multi-GPU Support | Yes (SLI, CrossFire, workstation) | N/A |
| Real-Time Monitoring | Yes (clock, memory, thermal) | Yes (live power and PD contract in Pro) |
| Stress Testing | Yes, safe for overclockers | No |
| Cable Database | No | Yes, public searchable database |
| Open Source | No | Yes (MIT license) |
| Offline Use | Requires internet | Fully offline, no network requests |
Pricing
Volume Shader BM: Completely free to use. No downloads, installations, or payments required. The benchmark runs directly in your browser.
WhatCable: The base app is free and open source. WhatCable Pro costs £4.99 one-time and works on up to 2 Macs. Pro unlocks 12 advanced features including live power metering, port health counters, PD contract inspection, and raw VDO identity. No subscription required.
Pros and Cons
Volume Shader BM
Pros:
- No installation required, runs in browser
- Comprehensive GPU performance metrics
- Safe stress testing for overclockers
- Multi-GPU support
- Real-time monitoring during tests
Cons:
- Requires internet connection
- Limited to GPU benchmarking only
- No cable or charging diagnostics
WhatCable
Pros:
- Free and open source (MIT)
- No telemetry or network requests
- Plain English explanations of charging bottlenecks
- Public cable database for community reference
- CLI tool for scripting and automation
Cons:
- Apple Silicon Macs only (M1 or later)
- Requires macOS 14+
- No GPU benchmarking capabilities
- Pro features require one-time payment
Verdict
Volume Shader BM and WhatCable serve completely different purposes and are not direct competitors. Volume Shader BM is the go-to choice for anyone needing a reliable, browser-based GPU benchmark for gaming, overclocking, or professional graphics testing. It offers comprehensive metrics and stress testing without any installation hassle.
WhatCable is essential for Mac users who frequently deal with USB-C cable confusion and slow charging. Its plain-English diagnostics and open-source nature make it a trustworthy tool for identifying cable limitations and charging bottlenecks. If you work with both GPUs and USB-C peripherals, using both tools together can give you a complete picture of your system's performance.