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ClockworkMod (CWM) Recovery easy install for RK3066 and RK3188 -- TWRP/CWM Flash-Tool and root for RK3288

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Cube U30GT2 Android 4.4.2 KitKat custom root firmware - test overclocked kernels
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Burs
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2014/02/22 - 19:08
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DarthJabba said
I will try a few new schemes for ddr720, and will post them shortly. Perhaps we will be able to find one that is stable for you.

And hopefully for others too. Thanks.

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2014/02/22 - 20:09
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Indeed.But you seem to be the only one apart from me that is not having problems with T15.

Hope that (at least) some of the above will work without trouble. They all work here.

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2014/02/22 - 21:13
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DarthJabba said
Let me know how you fare with them! Thanks.

OK, no more bootloops or black screens, but it isn't good either. All kernel variations trigger a reboot when going into stand-by. I hear the lock sound, and after a few seconds the Cube logo shows up. It seems like just a tiny piece is missing from the puzzle...

BTW, isn't GPU798 a bit too high? Default is 500Mhz, right? I saw it in some other rom too (Vondroid? FreakTab?), so I guess it's safe (though 'safe' is a very relative term when overclocking lol). If it really is, can I ask you if you can make a kernel_305kitkat_cpu1800_t14_gpu798h_ddr667 for me? Maybe I could find the offset myself by comparing GPU768 and GPU798 kernels, but you have more experience :) With the GPU798 all seems even faster. Maybe it's due to 3D launcher which obviously uses GPU processing. But I think that GPU is still the bottleneck, so in this case even the CPU will give more performance.

And just wanted to say when overclocking GPU, there will be greater difference in 3DMark and other heavy graphics benchmarks, because AnTuTu relies more on CPU and memory speeds. I didn't tested them now, but I might soon, just to see the difference compared to stock when I was benchmarking it the last time.

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DarthJabba

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2014/02/22 - 22:02
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I think the real problem is that your ram sticks can't cope with 720mhz. Apparently, some can't even go beyond 528mhz - and seeing that even 528mhz was commented out of the kernel sources, it seems that Cube themselves don't want to go beyond that with KitKat. So we are in uncharted territory once we go beyond 460mhz.

The gpu is generally stable at 768mhz. Most should be okay at 798mhz, but some will not. It all depends on the quality of individual machine production, it seems.

Attached are 3 more tests - ddr667, ddr698, and ddr710 (all with gpu798).

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maikal
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2014/02/22 - 22:27
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just able to get away from :honey-do" list. i will try these three last ones since the others have been tried. I may try those others if time permits.

 

Okay the first on is better than the original t14 I was using. very smooth, and less heating. I used it for about 1hr and 20 minutes. Watched some utube videos and did some light web browsing. No FC's recorded. Very nice.

 

Moving to second in last batch.

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2014/02/22 - 23:37
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DarthJabba said
Attached are 3 more tests - ddr667, ddr698, and ddr710 (all with gpu798).

I'll be sticking with 667, because 710 gives me a bootloop, and 698 is not stable in AnTuTu (I get either FC's or reboots). Now with GPU798 I get ~300 points less in AnTuTu than with GPU768. I thought I will get 300 points more. But you never know with AnTuTu, because it always jumps around. I'm sure the difference will be more noticeable while gaming (a frame or two lol). I think that's the best I can get on my tablet. Which in fact is very good and I'm very happy with it. Thanks for all the efforts, DarthJabba!

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2014/02/22 - 23:40
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Darth,

I have no problems at all with

http://www.arctablet.com/users/forum/kernel305kitkat_cpu1800_t15_gpu768_t15_ddr720.zip

Further on 4.4.2 my cameras both work fine.

My brightness works correctly. not reversed like some claim.

As a added bonus, this was the first version I could put a USB hub attached to the tablet and have it  work.

So I been really pleased so far and with your ram speed ups this makes a really nice machine.

The only thing I found not working is the "Hall effect sensor" used for compass type applications. I suspect they did not load the driver yet. But to I would not miss it, over the USB hub fix.

Have not had battery issues, I spend a day on the road , using it and leaving it in sleep mode when not.

At the end of 8 hours I still had 80%. Also leave my plugged up 24/7 when not on the road. No problems with over charge or other. Maybe I got a fluke, but I like it!!

There may be others out there that are working fine as well, we appreciate your work.

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maikal
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2014/02/23 - 00:13
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just able to get away from :honey-do" list. i will try these three last ones since the others have been tried. I may try those others if time permits.   Okay the first on is better than the original t14 I was using. very smooth, and less heating. I used it for about 1hr and 20 minutes. Watched some utube videos and did some light web browsing. No FC's recorded. Very nice.   Moving to second in last batch.

 

Second t14 was about the same as the first one, same heat, same smoothness. One FC during antutu all the way out. But a second attempt at antutu after watching some videos and light browsing gave me a score of 21k+ on antutu. I did not do Antutu on the first.

 

Okat moving on to the last t14 now.

 

Okay last t14, the 710, no problems there, watched a few utubes. some light browsing. The surprise was the first antutu score of 12k+, second was 13k+, way lower than the preceding t14-698. AS i said before the antutu on that puppy was a 21k+.

 

Those are the last 3t14 you posted. If I had to of course i would return to that t14/698. But I am going to go back to try those t14/798/720, then the t15s again.

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2014/02/23 - 06:23
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Okay currently on t14-798/720-1. First antutu 12k+, tablet has had no fc. Youtube videos worked just as good as all the others. 2nd Antutu 12k+, not much difference there. Text is not choppy as i slide screen up and down while reading news magazine. Better than original t14 which was choppy. In fact all the t14 that i gave a good review had no choppyness as i slid screens around. Seems stable enough, after about two hours, because I had to go out, I left it on and no fc's at all. Not sure what to make about those antutu scores. Should they be that low? Hit the reboot button expecting menu to come out, but instead it rebooted by itself. Had to remove reboot widget and re-install. Second time, it rebooted to recovery as it was set to do.

Moving to t14-798/720-2 now.

Okay, first thing I notice it is sluggish. Sluggish response when opening apps. Black screen between flipping from one app to another is first thing you see. Played an imbd preview trailer, got a reboot on video telling me video could not be played, but then it restated trailer. Regarding the coments about the text on the web pages, a bit of a blur when swipping pages up and down. Youtube video stuttered a bit. Same video I used with all kernels. so i could tell something was not right. No smoothness at all as camera panned around musicians. Slow to open browser and web page. Very slow responsiveness to pie controls. Antutu score was 16717, better than first one though. Still the slugishness of it is a turn off. No FCs though.

T14-798/720-3 now.

Started off with youtube video, since that was the feature I wanted to relook at. Very smooth, no frame skipping like the last one, very good. IMBD trailer worked flawlesly like 720-1. Web surfing pretty good from what i can see. pages load acceptably. Nothing great mind you but as good as the ones I gave a positive review earlier. Text not choppy as I slide page up and down. Pie controls receptive unlike the # 2. First antutu score was 20867. Although I found kernel 1 from this series to be a better performer, so again I don't know what to make of the Antutu score of the first t14-798/720! Second Antutu some time later was again 20768. Would have loved those score with 720-1

 

T14-798/720-4 now.

Well this one performed as well as 720-3. All the same test all the same results. Antutu score was 20622. I would say its almost the same and good enough for me to keep it at this time. I will give it more time tomorrow and see what else it can do. I think there is not much difference between  720-1/3 or 4. Second Antutu score was 20907., Not sure yet but I believe it produce less heat than 720-1.

Thats my report on the t1`4 798-720 series. I probably will not run the other t14-768 series since as i undesrtood your back and forth with Burs, the 798-720 were performing at a higher capacity than the 768's. Am I right? IF so I will probably give those initial t15 another try unless you tell me that there is little differences there. Or you come up with others to try out.

As always thank you DArthJabba for your work.

 

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2014/02/23 - 16:46
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1. The quoted antutu score on 720-1 is odd. One would have to see which of the elements is reported as under-performing. But I would have considered the result suspect, except that you report 720-2 as being sluggish. They are both almost the same in terms of the steppings. They both seem to have resolved down to ddr300 (the slowest frequency) while ignoring all the higher frequencies. I guess that the problem is down to the interactions between the different steps and how the OS decides which to select.That is one of the reasons why I decided to experiment with different steppings.

2. 720-3 and 720-4 are the same except for the lowest frequency (300mhz in 720-3, and 460mhz in 720-4). I guess that will only kick in during idle time, and may be relevant only to battery usage.

3. From my tests and yours, T14/798 is producing identical results to T15/768, so T15 is clearly a better performer because it doesn't require a high gpu clock speed to achieve top results (I haven't tried T15/798, so I don't know yet whether it would yield even better performance still). The question is why T15 is crashing your tablet. I suppose this relates to lower voltages, as that is the only difference between T14 and T15. Perhaps some Cubes can handle low voltages better than others.

4. T14/768 is producing similar results to the same under 4.2.2, so, in that respect, T14/768 is being consistent across JB and KK.

5. The question is whether the extra 300mhz in T14/798 would harm the gpu over the long term ...

 

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2014/02/23 - 16:52
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Burs said

DarthJabba said
Attached are 3 more tests - ddr667, ddr698, and ddr710 (all with gpu798).

I'll be sticking with 667, because 710 gives me a bootloop, and 698 is not stable in AnTuTu (I get either FC's or reboots). Now with GPU798 I get ~300 points less in AnTuTu than with GPU768. I thought I will get 300 points more. But you never know with AnTuTu, because it always jumps around. I'm sure the difference will be more noticeable while gaming (a frame or two lol). I think that's the best I can get on my tablet. Which in fact is very good and I'm very happy with it. Thanks for all the efforts, DarthJabba!

You're welcome. I think the lower antutu scores might relate to the interactions between the extra gpu speed and the lowest frequency of the ddr (similar to that experienced by maikal with 720-1 and 720-2). I should be able to tweak it ...

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2014/02/23 - 18:20
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Is there a similar benchmark tool to antutu? This moring the t14-4 again scored 20717. Working fine like last night. Going to try t14-1 again. Then head for the t15s.

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2014/02/23 - 18:34
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Here are my benchmark scores compared to DDR460/GPU768 (now on DDR667/GPU968):

AnTuTu = 21327 (+9%)
Quadrant = 5632 (+1%)
T-Rex HD = 6fps (+20%)
Egypt HD = 15fps (+25%)
NenaMark2 = 44fps (+26%)
Epic Citadel = 33fps (+32%)
3DMark = 3530/2778/4216 (+8%/+10%/+8%)

DarthJabba said
I think the lower antutu scores might relate to the interactions between the extra gpu speed and the lowest frequency of the ddr

And I think that this AnTuTu is so erratic with the given scores, that I'm not sure whether to trust it anymore. While other benchmark tools vary 1-2%, AnTuTu varies up to 20%. I've shutdown all apps that I could (launcher included), and now I get 21327, and yesterday I had 16k, 18k, 19k, and not more than 20300. It's interesting that I get 2k-3k points just by unmounting my sd card, which doesn't even have running apps installed on it. Something else is here at play, which also has an impact on the general performance.

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2014/02/23 - 18:38
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There are things like Quadrant (https://play.google.com/store/apps/details?id=com.aurorasoftworks.quadrant.ui.standard), and Passmark Performance Test (https://play.google.com/store/apps/details?id=com.passmark.pt_mobile), and Vellamo (https://play.google.com/store/apps/details?id=com.quicinc.vellamo).

I find that antutu and Passmark scores can vary significantly, depending on whether you have just booted up the device, or whether you have been running other things (in which case the scores tend to be higher). My test mode is to run Passmark memory tests first, then run antutu. That way, I get more consistent antutu scores between bootups.

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2014/02/23 - 18:42
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Burs said
Here are my benchmark scores compared to DDR460/GPU768 (now on DDR667/GPU968):

AnTuTu = 21327 (+9%)
Quadrant = 5632 (+1%)
T-Rex HD = 6fps (+20%)
Egypt HD = 15fps (+25%)
NenaMark2 = 44fps (+26%)
Epic Citadel = 33fps (+32%)
3DMark = 3530/2778/4216 (+8%/+10%/+8%)

DarthJabba said
I think the lower antutu scores might relate to the interactions between the extra gpu speed and the lowest frequency of the ddr

And I think that this AnTuTu is so erratic with the given scores, that I'm not sure whether to trust it anymore. While other benchmark tools vary 1-2%, AnTuTu varies up to 20%. I've shutdown all apps that I could (launcher included), and now I get 21327, and yesterday I had 16k, 18k, 19k, and not more than 20300. It's interesting that I get 2k-3k points just by unmounting my sd card, which doesn't even have running apps installed on it. Something else is here at play, which also has an impact on the general performance.

The i/o is also benchmarked, so if the sdcard is unmounted, then it will affect the result.

 

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