How Do You Achieve High Clock Speeds?
- Thread starter lancelott
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Vimacs
Don't be evil!
Evry unit is different, you might get a slight bit higher with stronger batterys but not much, you realy have to be lucky.
Also 275 is quite good considering that 240 is the highest for some.
Also 275 is quite good considering that 240 is the highest for some.
FluffyPanda
I have 6 little blue things. W00t.
You won't get much better than those batteries. I use them and some 2600s (can't remember the brand) and the performance of the energizers really is very good.
Fishbong
man of poor reputation
I had a GP2X that couild oc to 305 MHz, but the screen flicckered and the headphone socket was crap.
Now i have one that does about 290MHz...
Its really a gamble.
Now i have one that does about 290MHz...
Its really a gamble.
DavidBeoulve
GP2X by EvilDragon OC's to 280-300MHz
Fishbong posted on May 10 2006 at 09:37 AM said:
How do y'all avoid baking your GPX2's innards?
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Vimacs
Don't be evil!
arm cpu's dont get hot at all, no heat problems there.
DavidBeoulve
GP2X by EvilDragon OC's to 280-300MHz
Vimacs posted on May 10 2006 at 11:15 AM said:
Awesomeness!
So ... should this concern me?
"There is also a rumor that the second editions do not contain thermal pads (heatsinks) if this is true it will reduce the overclockability of the second editions. Peace out."
Source: http://gp2xreview.blogspot.com/
Sorry I'm so stupid with questions.
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nubie
Recovering Jerk-A-Holic
David Beoulve posted on May 10 2006 at 08:30 AM said:
Um, mine had thermal Insulating pads, I think that the second editions still have pads, just less and of a different kind because they were pressing on the back of the screen and making that funny LCD rainbow whenever you used the stick.
If anything just remove all of those and clean the chip with some rubbing alcohol for a start.
If you are going for a wicked overclock mod, use a peltier and a giant active copper heatsink or a compressor cooler (obviously only for bragging rights in 2xMark, it wouldn't be portable since the CPU is under the screen right now
). Of course you would need to find a really high quality chip, so send back GP2X's until you get a monster overclock one to start with, or enlist the aid of a distributer and promise to pay him accordingly. I wonder how long until we get guaranteed overclock units like with the BLU+ .I think the only way that would happen is if the PSX emu got to 60 FPS on Gran Turismo 2, 0 frameskip and it took 300mhz to do it. It shouldn't be too hard, GPH just runs off a specialty batch with A grade CPU's and then charges an extra $25-50, £12-25 (I know way too much).
I have been meaning to get another GP2X and use three Energizer 2500mah batteries in it to see if that will make it run smoother or overclock better.
The reason for that is the discussion a while back about the power supply circuit upconverting the voltage to 3.3 Volts anyway from the 2.4 we usually get with 2 NiMH batteries, I figure start with 3.6 volts and it should be much more efficient, thus lasting longer too. Although if it lasted about the same length of time at 300mhz that it does now at 100-200mhz I would be happy with making a battery cover that holds an extra AA cell.
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rokdcasbah
got me a date with botticelli's niece
David Beoulve posted on May 10 2006 at 11:30 AM said:
even so, the fact is that you can overclock safely. i remember someone saying that the processors are taken from a batch that are supposed to run at 266...i could be wrong but the principle is this: GPH's choice to make 200mhz the default (100mhz for menu) is based on stability & battery life, not longevity of the hardware. you can overclock as high as your gp2x will let you (any higher and you'll crash immediately or within a couple of minutes). but your batteries will go quicker. and as vimacs said, this is largely because ARM processors are low-power and run cool.
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nickspoon
vultum stultum habes
You can overclock safely because ARM CPUs crash long before they can overheat.
FluffyPanda
I have 6 little blue things. W00t.
I think it was squidge who found that the power drain at a slightly higher operating voltage was considerably less, so your idea should work pretty nicely.nubie posted on May 10 2006 at 08:32 PM said:
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Paradox
oh em gee
I took my dreamcast thermal pads out and stuck them in my unit (which had none) i got about 20-30 extra mhz ocing without it crashing.
DavidBeoulve
GP2X by EvilDragon OC's to 280-300MHz
Paradox posted on May 11 2006 at 08:36 AM said:
Whoa, describe what those thermal pads look like / were made off and where / how you put them into your GPX2 please!
I can buy a used Dreamcast for $35 - but finding material would probably be much cheaper.
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FluffyPanda
I have 6 little blue things. W00t.
I'm willing to bet you can buy a broken dreamcast for less than that. Try ebay.
DavidBeoulve
GP2X by EvilDragon OC's to 280-300MHz
LOL you're right. 3 broken systems for $15 shipping plus cost, starting at $1.
I think I'll try some computer shops around town for parts first, though. What was that padding? Where did he put it?
I think I'll try some computer shops around town for parts first, though. What was that padding? Where did he put it?
Epicenter
Well-Known Member
The likelihood of a thermal pad improving your overclockability is rather low. ARM9s produce very little heat and the MMSP2 should not get that warm. Unless the difference in temp is something like 80C to 30C, stability increases are improbable. Now, if you want to rig up a TEC (thermoelectric cooler) onto the MMSP2 and chill it to <0F, that might work. But there'd be no room to mount a heatsink to cool it with the screen there. Maybe custom fit some heatpipes or a tiny waterblock and all-in one pump with a little bitty radiator on the back of the unit. OK, now I'm dreaming.
