Bitcoin Forum

So Im actually mining with a 6850 cyclone in my own PC, with a P8P67 Deluxe wichI think it has like 4 PCI-e. Im getting a new 5830 in 2 weeks, and then a 5850.

I've just made the dummy plug, the resistors are 68 ohms, but I noticed that the wires are thinner than the pictures I saw of other dummys. Is this ok? The blue thing is also much smaller than the ones i saw around on some forums
I've also been told than I NEED to put some thermal insulation (aislante termico in spanish) in the wires cause if they touch themselves I can kill my card. Has anyone done this already?

Here some pics of the dummy i made:
https://i.imgur.com/KMYkF.jpg
https://i.imgur.com/D79Zz.jpg
https://i.imgur.com/YOt0e.jpg

I dont want to buy them and then kill them for not knowing such a stupid thing, sorry for asking this but I have to be sure about it hehe

Cut the wires so the actual resistor is closer to the connector. This will also limit the chance of two legs touching. The other trick is to alternate the side the resistor is on. I didn't bother with tape and my plugs are working fine this way.

what are you doing, why are you putting resistors in a plug or whatever that is.

The thinner size of the wires and the middle thing is ok? Could I have problems with this or its the same thing?

I'll do that and post another pics so you can tell me if its ok or not :)

exact. OP, why are you doing this?

As I said, i have a 6850 in my PC. When i install the new card in the same PC without doing any bridge thing (because I cant, and anyway if I could i wouldnt do either) I have to trick the card to think it has another screen plugged in to it, so this is for doing that. Since I dont have another monitor for each plug. I may have 1 spare, but not two.

Only the windows video drivers require a monitor to be plugged in. On other systems you're fine.

Oh i didnt knew that!
Sadly, this is my own PC, so I need windows for several stuff. Maybe in the future I can made a mining rig with linux of course :)

Any other tips for the dummy on other solutions?

Resistors seem fine, smaller wire size is a non-issue so long as one single part of the resistor is touching any part of the inside of the socket (pretty much impossible to not have happen).  As mentioned, trip them down a bit, and maybe use the alternate trick just to be sure they don't touch.  Worst case if they do is you blow the adapter, you can't really screw up the video card this way.

Ok, that very good to know. I hope youre right.

So i guess I'll go buy more resitors and do it again, cause i just cutted the ones i had a little too much :P

Another question:
I have a monitor I could plug with this DVI to VGA adapter. Will this work the same as the dummy if I plug in the monitor to the card, but not the monitor to the electricity? or I have to conect it to electricity?

I also did not know that with no monitor windows would do that.

Do you need to have it on all the time or just when windows starts?

Just plugging it is in fine, doesnt need to be turned on, what happens on the monitor is the exact same thing you're doing with the resistors, when plugged in it creates the loopback that lets things be detected, so if you have the spare monitor just hook it up and have 0 risk of anything going wrong.

I have found I only need 1 resistor per plug.  Going from pin 1 to pin 6.  No need for all three.

That is slick news... i'll be sure to try one resistor when i make mine, 1 resistor reduces the chances of a short by a whole lot.

Yes, I use dummies with a single resistor and they work fine.

Am I correct saying Windows XP doesn't require the dummy plugs for mining to work? I am planning to install WinXPPro soon.

Well thats very good to know! haha. It makes it all much simpler.

Si pin 1 and 6 are corrct in this diagram?

http://soerennielsen.dk/mod/VGAdummy/1_lille.jpg

Why is everybody using 3 resistors without knowing its the same thing?

Cause using 3 resistors rises the odds 3:1 when there's a chance a single resistor to fail. It is good to ask too why the flick they choose for the diagram 75ohm version, there are rumours about signals from the pins but not so much high voltage...

the three has nothing to do with failure
3 is the number of "signals" that are normally loaded by a monitor
the 75 ohm is the normal load for video stuff
that does not mean 75 ohm resistors are real resistor value in the way they are designated
68 .. 82  are 10 % values
you need 5% for 75

and in the real world anything with in 10% should do the job

can't you just start the miner and then mover the cable to the next card and then start the miner there. doesn't that work?

That can get to be a PAIN

Failover maybe? In the real world electronics for purposes like ours must have backup wiring/chains.

WTF
wiring chains back ups

when ..IF you graduate some kind of college
THEN SPEAK

In the mean time STUFF your drival and don't speak of what you know nothing

 

So? If you're speaking from the position of "guy with college certificate" just tell us what is inside of a mass produced 75 ohm resistors ...

the cheep ones are carbon
1% ones are some kind of metal film

Well I guess im trying with the dummy with just one resitors going from pin 1 to 6. Im receiveing the first card in like 10 days or less I guess. Hope everything goes ok.

Thanks for all the replies!

i swear to god ill keep bumping this post till someone tells me what kind of RESISTORS to Buy

its not that hard to put together  clip the end, plug them in, ect ect

What kind of Resistors should one use? 1 watt 100 resistors?

i heard people say 75 ohm or something, what about 100 ohm? or 50 ohm? what the Hell is ohm?

how do you know what to use?

 1/2-watt resistors ?
 1/4-watt resistors ??
 1/8-watt resistors ???
 1-watt resistors ????

Apparently you can't read or use google

75 ohm 1/8w or 1/4w are fine
anything with in 10% of 75ohm will work

only think i could find was 100 OHM resisters 1/2 watt, its currently being used as a dummy plug

i have 68's or 67's OHM half watts i think

is Lower Better or is Higher Better on the OHM's? also, what does it help to have a 1/2 watt compared to a 1/4 1/8th ?

Ok, Im getting my new card today. Ill use just 1 68 ohm resistor in my dummy. I hope everything works fine  :)

For my cards I used 100 Ohm resistors, at 2 Watt and they work, so these work too. I read somewhere that anything up to 120-125 Ohm should work.

After connecting the dummy, what should I change in win or catalyst properties?

My god learn to use google already!...

Anyway to the confused people: Any resistor between 60 ohm and 1000 ohm WILL work, it doesn't NEED to specifically be within 10% of 75 ohm and what bull people without any electronics knowledge is spewing out, sure that's the spec for VGA but in reality it doesn't make one bit of difference because you're just making sure the conection is shorted

Ok, I can now confirm the dummy with one 68 ohm resitor works fine!  ;D

What I still dont know how to do is how to overclock the 5850, cause it doesnt appear on Afterburner or Trixx. It only appears the 6850  :-\

In "settings" you should be able to switch around the master gpu. If it's not visible there then the problem lies elsewhere, your card probably didn't boot up properly.

Youre right haha, what an idiot :p

update:

5850 Xtreme 800/1000 -------- 301 Mhash

I tryed to low down the memorys to 500 but the syustem crashed all up and had to reboot. So i guess im leaving them at 1000  :-\