[KERNEL] Clemsyn's Elite Kernel: Pushing the Limits of Nexus 7. Now with 700mhz GPU.

MOD NOTE: IT APPEARS THIS KERNEL IS FOR 4.1.x ONLY. Flashing on 4.2 will result in bootloop. also, this kernel is unsupported by the OP, so thread is currently CLOSED


First and foremost, I would like to thank _motley for his kernel since this is based on his kernel. I chose his kernel because I have worked with him and IMO is the best kernel out there at the moment . Second, I would like to thank pinoyto and secret for testing the kernels. Also thanks to Koush, Blades, faux123, pershoot, chatch15117, all the Gtab, Asus Transformer and Motorola Atrix users, and other devs that I may have missed. BIG THANKS to my beloved wife for watching the kids while I do this.

I call this kernel elite since the timings are pretty aggressive and voltage are decreased on the low side and increased on the high side. This kernel might not work on your device because of these so be sure that you have a backup and and that you are familiar on restoring your device.

The following are the difference with motley's kernel

1. JRCU is implemented
2. Lowest backlight setting set to 5 (save battery and better reading at night, if you have screen flicker issue it will be more noticable because of this so I suggest covering the ground pin of wifi)
3. Core voltage increased from 1200 to 1250mv on the high side to hit 1.7 frequency and 600 GPU but decreased from 950 to 900mv on the low side.
4. Increased CPU voltage to 1240mv for 1.7 frequency but allows decreased 750mv in low side
5. Increased GPU clock to 600 and pixclock increased (please let me know if you have problems on screen due to pixclock increase but so far no issues on testers)
6. Built using gcc 4.5.2 ( I know, I'm an oldie)
7. DVFS core table completely changed to allow max clock of host1x and pll_c and hit most max frequencies.
8. Enable Thermal_Sys to throttle at 68 (BTW, if you are using system tuner, the reading is +10 as per secret)

Added 484 GPU and 520 GPU. LMK how it goes.

Link is below

Source in compliance with GPL

https://github.com/clemsyn/Grouper

IF YOU WANT THE UNDERVOLTED VERSION PLEASE SEE SECOND POST

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UPDATED 09/23/2012

Releasing another 1.8ghzCPU and 650mhz GPU

Here are the differences with the last 650gpu

1. Used Linaro compiler
2. Increased 3d/2d bus, pll_c, and host1x for higher scores
3. Removed the pixclock overclock, This is running on default pixclock by Asus. This will limit the fps to 60 fps max, so old benchmarks will not score over 100 fps but will only max at 60. I suggest newer benchmarks like GL2.5 or Benchmark 2.0 ES Taiji...
4. EMC voltage decreased to 1.100 mv (Not sure if your device can handle this but pinoyto's device was fine with it)

Here is the link

https://rapidshare.com/files/2462982943/1.8ghz650GPUNopix.zip

If you like my work, please click on Donate button on my Sig and add on to my Nexus 7 fund Thanks

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UPDATED 9/20/2012

*** SPECIAL RECOGNITION goes to PINOYTO for the first donation of this project. THANKS for rewarding my hard work!! ***

Thanks to masterg0g0 for 2nd donation

Also thanks to all the testers of the 700mhz GPU.

This latest kernel comes with the 1.8ghz CPU and 700 GPU with 3 types of pixclocks.

First off is the max pixclock. This has the highest pixclock of all the kernels and will limit your fps to over 100 fps. The downside is the pink screen issue.

https://rapidshare.com/files/901768617/1.8ghz700GPUMAXPIXoc.zip

Second is the mid pixclock overclock. If you have a pink issue on the first one, try this. This will limit your fps to about 90 fps. The downside is you might still have a pink screen

https://rapidshare.com/files/4017246162/1.8ghz700GPUMEDPIXoc.zip

Third is the NO pixclock overclock. This for sure will have no pink issue but will limit your fps to about 65 fps.

https://rapidshare.com/files/258377771/1.8ghz700gpuNOPIXOC.zip


Here are the changes made from this latest kernels

1. GPU increased to 700 gpu, vcore and vrail voltages increased
2. pll_c, host1x increased to accomodate the increase in GPU speed
3. Compiled using Linaro toolchain.

WARNING:

The timings in this kernel are very aggressive, voltages although within Nvidia limits are high. Please make sure you backup and be very familiar in recovering your device.

IF YOU LIKE MY WORK, PLEASE CLICK on the "DONATE TO ME" BUTTON UNDER MY SIG TO SHOW YOUR APPRECIATION and ADD on to my "NEXUS 7 FUND". Your donation will be GREATLY APPRECIATED. THANK YOU.

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UPDATED 8/17/2012

Overclocked to 1.8ghz with GPU at 650..WARNING THIS IS GOING TO GET HOT!!!

https://rapidshare.com/files/1034477848/Clemsyn1.8GPU650.zip

Pink fix

https://rapidshare.com/files/223841402/Clemsyn1.8GPU650Pinkfix.zip

Changes:

1. Temp limit increased to 70
2. Voltages increased to accomodate 1.8ghz and 650 gpu

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BTW, if you like my work, please dont hesitate to click on the Donate button under my username. Thanks.

Updated 8/23/2012

This new kernel is based upon what I believe is the best overclocking speed (1.5 ghz) and a cpu nominal voltage of 1.150mv and a core of 1.175 mv (core default is 1.2) while lowering the lowest voltage of 750mv and 900mv respectively. This kernel hits the max speeds of the GPU at 600 while utilizing the lower voltages to insure better battery life and less heat. Also pixclock has been decreased to minimize pink issues on the screen Again, this might not run on all Nexus 7 due to aggressive lowering of voltages. HAVE FUN!!
Also make sure you have a backup and familiar with restoring your device.

BTW, if you like my work. Don't hesitate to DONATE and help me buy some diapers Thanks

Finally got the issue why most devices where not working right. Also was able to undervolt MORE because of this finding. Here are the changes

1. Vcore undervolted to 1.15 mv (default at 1.2) cpu mv at 1.15 mv running 1.5ghz
2. pll_c decrease from maximum (this was what was causing all the issue)
3. This kernel is set to 1.5ghz automatically. However if your ramdisk is programed to 1.3, then it boots to 1.3 intially. After pressing the power button once (or letting it sleep), it automatically resumes to 1.5 ghz without any CPU program.

I highly recommend that these settings be used for better battery life, LESS HEAT and power usage... Good for daily use

Here is the link

https://rapidshare.com/files/1026092132/Clemsyn1.5extremeUndervoltedFINAL.zip

BTW, if you like my work please show your appreciation and click on the Donations link under my signature. Thanks.

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Update: 8/17/2012

OK, updated this version of the kernel to increase CPU Core to 1.2mv for some stability for some users...Here is the link

link deleted for latest version above

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This new kernel is based upon what I believe is the best overclocking speed (1.5 ghz) and a cpu nominal voltage of 1.150mv and a core of 1.175 mv (core default is 1.2) while lowering the lowest voltage of 750mv and 900mv respectively. This kernel hits the max speeds of the GPU at 600 while utilizing the lower voltages to insure better battery life and less heat. Also pixclock has been decreased to minimize pink issues on the screen Again, this might not run on all Nexus 7 due to aggressive lowering of voltages. HAVE FUN!!
Also make sure you have a backup and familiar with restoring your device.

BTW, if you like my work. Don't hesitate to DONATE and help me buy some diapers Thanks

Thanks to all the testers of 2ghz kernel. It seems like I would have to increase the vcore from 1.45 to the maximum of 1.5mv. This will disable the ability to go to bootloader from the ROM. Also that increase of vcore should help with the 725mhz GPU. I'll build one tomorrow, I'll apply the low pll_C voltage too. For now, homework with the kids

ihateu3 said:

You made the front page on Engadget with your work, good job!

http://www.engadget.com/2012/08/27/google-nexus-7-overclocked-to-2ghz/

Click to expand...

Click to collapse

Thanks for the link. I think they also need to give credit to _motley in the post in which this kernel is based. This would not have been possible without his kernel

BTW, will try to fine tune the 2.0ghz more and see what we can do but I believe we have hit the ceiling

Thread Closed

After getting several requests to close the thread, I have thought it over, and decided to close it, due to::
a. No support from developer
b. Broken links to files
c. People flashing a 4.1x kernel on 4.2 resulting in bootloops.

PM's to the OP have gone unanswered, and no activity in the OP's account since last year. So it seems this project is abandoned.

If the OP wishes it to be unlocked, then contact me.

MD