do a DIY semi thermal glue :
Mix thermal adhesive 2 part mix, and same amount of thermal paste mix well.

Sticks the parts together nicely dries quickly no need to wait for the hot cold cycle. heat sink will come away if needed with a small amount of force. its a semi adhesive

in time of need ive done a a diy tester. basically battery two bits of wire and a light bulb, or led and resistor. or if you have a tourch thats metal unscrew the bottom one wire onto the case the other onto the battery termanial. granted not great but for testing continutity works. few corc clips help here, or paper clips to hold things in place. you could use a buzzer as well. you just want somethign that will show you theres a complete circuit, light, led (use resistor in series!) buzzer


EXCIRSE CAUTION AND COMMON SENSE THOUGH. ALSO BE AWARE USING TOO HIGH A VOLT BATTERY IE 9v COULD CAUSE DAMAGE.

im on 12v thermal take 120mm fans so got cooling and no noise!

i was just bouncing ideas and suggestions around wolfey, trying to see a common factor wiht the blown FB that all.

Look like the crystal is still high, you can clearly see the componet imprssion in the thermal pad. and several other componet impression as well.

Overheating could be a big factor. just curios thoose that have blown FB how are you running them? wiht 5v fan mod?, wiht no fan? top heat sink removed? its possible that the 5v fan mod isnt providing enough air flow for the FB causingthem to overheat. likewsie if there is no fan. if it overheating though lack of air flow, take all facotrinto account, ie climate, room temperture humidity, location of grids .

I know runnign them wihtout the top sink can cause them to overheat, i was testing them had top heat sink off, and fans (120mm) running next to them, which got knocked and i didnt notice and im pretty sure i fried a few grid chips, tried reflow to no use. the chips are recongised by cpuminer all of them but only 2 are hashing. anyone know where i can get a few grid chips from to replace the cooked ones?

bitcoin and litecoin and tag and any other wallet ive used never been flagged.

they are working on it and having been for past 2 months? still there, plus the max coin website is down AGAIN.
And i checked the source which seems fine - just have issues complieing it on a windows based system! - but that doesnt mean a compiled version cant get infected before its uploaded!

and thankyou for some explantion of why still dont get it though. Still not sure though.  it shouldve been fixed, if the devs where serious about it it wouldve been fixed and shouldve. Espcailly after the not so long ago "so called thefts" from wallets. its disappointing especailly wiht the site being down - doesnt look good.

and where can we get one that does flag a virus!?

dont give me false postive its the wallet aint no chance or risk taken there. Plus i dont see nor understand WHY a wallet should get a false postive? the mining programs i understand why - due to them being used in trojan packages for mining, etc, the anti virus companys buyndles the whole deal as a virus inc the mining programs. but a wallet no evil use there.
Useless you can explain to me WHY the wallet is getting flagged by my antivirus software - oh its only 9.0 and 9.1.0 that get flagged the newer versions.

if its hashing away and using 20w itll be producing 20w heat. hashing produces heat it doesnt turn it into another form of energy. ok there a small loss in the fan and the leds. but its all gone out as heat if not from the gridseed chips themselves then the voltage reg crystals and other pieces.

You could measure it putting it in a metre by metre box giving a 1m cubed volume area, of airt at room temp make sure only the grids are inside disconnect the fan and power it up and time how long its takes to rise the temperature in the box by 1 degree. take an ampage reading of just the grid seed, not the power convertor or from the wall or psu but at the grid. find the energy co efficient of air compare contrast and youll find your answer.
something like that anyway

46.2K draw 1.43A  17.16W /MHZ 1160 /hash rate 490
 5W extra for 11k with the 47K!
watt is effectored by the resistor AND MHZ, so it good to put lower resistor and higher hash rate, as opposed to higher reisitor and lower hash rate.

Just leave the top off. Add small indivdual heatsinks to the top of the chips. It allows a better airflow leabing it open. The air flow fro  the fan os pretty totally redticted due to the pcb. Leaving the top off also allows you to add a heat sink to the voltage regs. There is only. The top of the chips toucjing the heatsink. Really for mini g scrypt is it needed a smaller one or ones would be better. Remember these where desgined wattage and heat wise for the sha or dual mining mode.

Hardware errors are gonna vary from device to device chip to chip, even wiht same mod applied. for starters theres an error in resistor values even at 1%, for the resistor (r52 mod) then there is plenty of other resistors on the board as well - the main one thats gonna effect voltage is r50, connected to DGND from the buck convertor, plus the resistors for the DPLL voltage. All these will give a variance although small, but when measuring voltage in.00 volts it can make a difference.
Secondly these chips are Intel or AMD chips, manufactured to the same constiant and quality control as thoose so each chip itself will have a different optium performance. Not to mention the whole assembly of the grids isnt to the high standards and quality control we would like.

CPUminer i believe uses the hardware errors to adjust the hash rate, no hardware errors over x period hash rate goes up. x hardware errors over x period hasrate goes down. until it finds a balancing point.
When running a batch of grids from the same command file - with setting each one indivdually - a varying amount of hardware errors will be produced, as each device will start of the same and autclocked until it gets the hardware errors. After running CPUminer for say 24hr, if you take a note of the hash rate for each grid, set a batch file wiht autotune off and set each one indivdually youll probably find over the next 24 hours that the hardware errors are a lot lower if none at all.

UDATE ON POWERING THE GRIDS WITH 5v
I found it ran nicely at stock settings - 650 mhz .
Pulled 0.77A and had a DVD volatge of 1.46. hash rate of about 250. For some reson reason the though i was only able to get one type of grid running with 5v. The newer type wiht the SMD leds.
Once modded though the hasrate dropped through the floor BIG TIME! went down to about 20-70! ouch! so back to 12 v it was.
So basically anyone runnign these at stock no overcloking or modding - why woud you though! - can run these on 5v wihtout effecting the hasrate and save on enery costs.

summary stock (no modsS!!! ) 650 - never tested 850 sorry - runs fine (SMD LED version only).
DO NOT run a modded grid on 5V your hashrate suffers.Even at 650!

this has been discussed and mentioned about the risks of shortening out componets etc.
there been many discussion about pads or paste or stock! we all know where you stand wolfey
thermal paste is better - but more messy!
the bits that are touching seem to be the crystal - ive dented mine! - and the chip next to it. theres the option to get the rimmel out and take a bit out of the center column on the heatsink.
I say use the thermal paste underside, thats where most heat goes! trim the heatsink, on top, pads - i use a bit of thermal paste as well to help with adhesion to the chips. be warned though

https://bitcointalk.org/index.php?topic=519112.msg6361304#msg6361304 - concerning the underside of the PCB!

to save some pad yher is no reson to cover the whole of the center column in thermal pad. just cover the tops of the chips - 4 small squares! you can make the one near the power supply a bit bigger to cover the crystal and chip.
and i found Zig post as well

EDIT : yeah adding the link to Zig post WOULD help : https://bitcointalk.org/index.php?topic=519112.msg6365619#msg6365619

hope this helps. theres no clean answer on this topic - just lots of advie and recommendaitons - good and bad , its really a person preference, until we get test data on temp and paste vs pads vs stock, but i dont see that happening anytime soon One last thing dont tighen the screw too much risk of short and risk of damage to PCB - i over tighten and dented my crystal!

modding voids warranty!

got my 33mhz too! first got to get them hash stable before i can even consider trying it on any

try wolfey version of the mod! same thing but uses a 1/8 axle resistor - so bit easy to handle, alos solder it different points, but whihc are electrical the same. He done several post on his mod, sure if you ask he hee point the page - maybe hell give you a link to it too. its sound as is zig mod electircal they are both sound mods. wolfey mod is in here some where many pages ago!

SAndor111 - how does your autoclocking feature work? is it keep increasing the frequnecy every x steps until hardware error? or is it an ratio % hardware error to accepted shares type thing. just wondering what the tech/ logic behind the auto tune is.
And a) recall how to compile for windows?? i was playing over the weekend but hit a wall!
b) any chance or mauall /via config file adjusting the autotune setup - to say x steps and x% hardware errors type thing???

i got one red nounce after several hours and it knocked the frequency back down. grr! one hardware error over several hours ainnt nothing, and its gonna be impossible for everyone to get zero hardware error - heck ive even had them on new grids at stock freq. each grid and each chip varys so much.

i glad you mentioned that as i was wondering myself which physical chip on the board corresponds to sandors111 0,1,2,3,4 chips. Im assuming that 0 in the cpuminer corresponds to the M1 in the schmatic through to m5 (being chip4 in cpuminer).
And looking at the PCB

	M1
M3	M2	M4	Power Supply
	M5

Looking at the PCB -from above - with the power supply on your Right

so M1 = CPUminer chip0
M2 =     ""            ""   1
etc etc
M5 = ""               ""    4
If sandor could confirm that itd be great

Say you who feed a 12v fan 5v from the usb port!
itll draw the current it needs to run, regardless of its supplied voltage. in theory it should go slower.
wiht voltage current CONVERSION as you up/down one the other changes in repect (energy can not be destroy only converted from one form to another - physics 101). so up the voltage ampage goes down. drop the voltage ampage goes up. wiht a conversion, say 12v conversion to 5v conversion - as appears to happen wihtin the grids.
Im not converting 12v to 5v im marly supplying 5v to start with.
and hashing away at 650 - easy break in - its drawing a steedy 0.79A.
At 5v * 0.79A = 3.95 Watts
Compared to 12v at 0.6A (i think but that was just startup never measured the current draw for 650 hash rate!) = 12v*0.6A = 7.2 Watt.
So already its less wattage. oh at startup it pulled 0.47A
5v *0.47A = 2.35 Watts

Your totally right, i didnt run with it not for being afraid or anythgin i was simple waiting for my parts to arrive - they took nearly 2 weeks darn it! -. Yep total credit for the 5v fan mod.
Now i have an improvement on the 5v fan mod - 5v gridseed! yes its running with 5v! Spare power supply i had for a usb hub i blew by mixxing up the power supply and pluggin 12v into it -my other hub all use 12v.

You know if this works out then the 5v fan mod is gonna be no longer needed. burn in first then i start trying to overclock it while running it under 5v.
THIS IS ALL TOTALLY NEW AND IS NOT CONFIRME IN EITHER WAY - GOOD OR BAD!

R52/R139 MOD : intresting enough i came across an article in chineese and after a bit of translation turns out there is the r50 resistor as well. Checking the schmatic its 33k grounded. appears this has some influence on your voltage and hashrate. the trick is to get it to 33k. its a 1% resistor 0402 series, but it could vary and this variance afffects the overclokc voltage and hence your succesfull hashrate and hardware errors. I suggest checking it, if it more than 33k pencil mod to bring it down to 33k if its less, then either swap it or increase the resistor for the R52 mod. Im still trying to gather date to calcualte how it affects everythig, but the are related. says the optimal voltage is 1.71-1.72v.

This variance could explain why people are getting so much variance in results hash rate wise. so while 47K mihgt be good for one due to variance in resistor even at 1% its not forced to be the best for another grid!

If folks could take readings of resistance across R50, R52 (AKAR139) and the voltage across R52 maybe we can calaute the formulea to produce the required values. if you have these values PM me more data the better fit i can get.

Check your crystal!!! just inspected mine and found a small dent in the top - caught possible from when fitting the top and maybe overtighted a bit too much. the dent fits exactly where the edge of the central heatsink block is. darn it. time to get the drimmel out again. hopefully it aint damaged it too much. oh well looks like crystal swap is in the pipline - upgrade the crystal anyone? thinking maybe a 33mhz in there .

the frequency wont have fried it i had mine at over 2200MHZ back in the ealry days of this thread - got too many hadware errors though!

Oh something of importance :i just plugged my new gridseed into a 5v yes thats right 5v power supply.i had one laying around and was just about to chop the barrell connector off it when i had the idea. guess what its running fan going and its hashing away. i set it low so its hashing at 650mhz wiht the autotunne cpuminer so lets see how it goes. looks promising certainly for cutting the wattage down at any rate! 24hr from now ill be overclocking it.