Thanks to DooMLoRD, member of the XDA-Developers forum, it is now possible to push the limits of the HTC Jetstream’s CPU to 2 GHz with the help of a custom kernel.
The first kernel of its kind for the HTC Jetstream, this kernel comes with a number of features, such as:
- CPU overclocked to 2.05 GHz
- CPU underclocked to 192 MHz
- GPU overclocked to 320 MHz
- For safe booting, the CPU is capped to bootup to a maximum of 1.53 GHz and a minimum of 384 MHz, slightly undervolted (at least to stock frequencies)
- Uses LZMA compression
- Added a lot of fixing/patches, including CPU Hotplug notifications / CPU unaligned access
- VDD CPU voltage control (@ /sys/devices/system/cpu/cpufreq/vdd_table/vdd_levels)
- Compiled using Snapdragon optimizations
- PERFLOCK disabled
- SWAP enabled
- Enabled few file systems support: NTFS, NFS and CIFS
- Insecure kernel (ro.secure=0 and USB Debugging by default)
- /system mounted as RW
That list of features looks very tempting indeed. We’d like to remind those of you who’d like to install this kernel on to your HTC Jetstreams that overclocking comes at a risk. By pushing the hardware to its limits, you may risk damaging it. Please proceed with caution and only if you’d like to take the risk.
You’ll need a few things before you can install the overclocked kernel on your HTC Jetstream:
- A rooted HTC Jetstream
- Stock HTC Jetstream ROM (or ROMs based on it)
- Bootloader unlocked
- Working recovery
- ADB installed on your computer
- VDD control app, like IncrediControl
- An Android app for overclocking such as: NoFrills CPU Control (Free) or SetCPU (Paid)
- Overclocked Kernel for the HTC Jetstream
- WiFi Module
Once you have all of those requirements, you may now proceed to installing the overclock kernel:
- Download the overclock kernel and the WiFi module onto your computer.
- Connect the HTC Jetstream to the computer.
- Copy the WiFi module into the root of your tablet’s external SD card.
- Copy the kernel image to same folder where “fastboot.exe” is located inside the Android SDK installation folder on your computer.
- Reboot the HTC Jetstream into fastboot mode. You can do this by issuing the command “adb reboot bootloader” (without the quotes) at a command prompt on your computer.
- Open a command prompt on your computer and enter the following commands:
- fastboot flash boot JetStream-HC-DooMKernel-v01.img
- fastboot reboot
- adb reboot recovery
- Once the device reboots into Recovery Mode, select “Wipe cache partition”.
- Select “Wipe Dalvik Cache” from the Advanced menu.
- Navigate to “Install ZIP from SD Card” and select the WiFi module (ZIP file that you copied to your tablet’s SD card).
- Once the WiFi module has finished installing, reboot the device.
Once your HTC Jetstream reboots, your device’s CPU will now be able to overclock up to 2 GHz.
Recommended Way to Overclock Your HTC Jetstream
To start overclocking your HTC Jetstream:
- Start the overclocking app (e.g., SetCPU or NoFrills CPU Control) on your device.
- If you get a popup asking for Superuser permissions, choose to allow or grant it.
- Move the MAX slider one notch to the right. This will increase the maximum frequency limit, but style=”text-decoration: underline;”>do not move the slider fully to the maximum frequency limit on the right-most side.
- Perform stability testing for this setting for a few hours. If the setting seems stable, move the MAX slider one notch further to the right, then perform stability testing again for a few hours.
- While testing, never enable the “Set on Boot” option on any of these apps in order to avoid bootloops.
Congratulations! You can now boost the clock speed of (overclock) your HTC Jetstream. Enjoy the performance gains from overclocking your device.