A more invasive, but definitive, physical test is to (if you are comfortable voiding any remaining warranty and have the proper tools). Look at the motherboard. A JTAG installation is minimalist. You will see five thin wires soldered from specific points on the bottom of the motherboard to the JTAG header (a small square of pins near the GPU heatsink). It is a clean, sparse mod.
An RGH installation is visually noisier. You will find a small, separate circuit board (the glitch chip) glued or taped inside the case, usually near the HDD caddy or the front panel. From this chip, several wires (typically 3 to 5) run to specific points on the top or bottom of the motherboard: PLL_BYPASS, CPU_RST, POST_OUT, and ground. If you see an extra circuit board with wires, it is RGH. If you see only a few wires going directly to a square JTAG header, it is JTAG. If physical inspection is not possible, the software environment provides clear clues. First, boot the console while holding the eject button. This is a universal shortcut for all hacked 360s to boot into a recovery menu, usually XeLL (a Linux-based loader). If the screen turns black with white text, showing your CPU key, DVD key, and network settings, you are running a hacked console. However, both JTAG and RGH can do this. The distinction lies in what is shown . XeLL will not tell you the hack type directly, but the fact that XeLL loads is your confirmation that unsigned code runs. how to know my xbox 360 is jtag or rgh
An console, in contrast, often exhibits a telltale "glitch" pattern. Depending on the glitch chip and its programming, you may notice the following: The power button lights up, but the screen remains black for 5 to 30 seconds. Sometimes, the green center light might flicker or the disc drive might make a faint chirping sound (if the glitch chip is tapping the POST bus). In older RGH 1.0 or 1.1 consoles, you might even see a small LED inside the console’s vent (if the installer left the glitch chip visible) blinking rapidly during the glitch attempt. In summary: instant, predictable boot = likely JTAG. Delayed or inconsistent boot = almost certainly RGH. A more invasive, but definitive, physical test is