I really like that device froudeg. Please pm me with some more info about it (or link me if there is a thread about it). I don't believe I've ever seen anything quite like it before.
Printable View
I really like that device froudeg. Please pm me with some more info about it (or link me if there is a thread about it). I don't believe I've ever seen anything quite like it before.
Its actually a piece hacksawed out of an old KG7-lite (very lite now :hehe: )
http://www.coolmods.com/generalpics/kg7-very-lite.jpg
I uprated the transient load caps, put in var pot for adjusting voltage, nd altered part of the feedback circuitry.
Works a charm! - much more stable voltage then what the onboard IC7 linear regulators could supply.
froudeg
Now THAT'S what I Call "XTEREME",Man!:rocker:
This is what XS is All About!:toast:
So you took a board that (I'm assuming) used 5v for the vdimm line, vdimm modded it, attached a 5v line to it and a return line to it, and hooked it up to your systems vdimm line?
"altered part of the feedback circuitry."
More details on this especially, please.
By default that section of board supplied 3.42v to various chips on the KG7-lite.
The feedback mod i did was to reduce the resistance on the positive side of the potential divder that was used in the feedback sense path of the hip6012....this reduced the output voltage to 2.15v......then i put a variable trimmer (1k) across the negative resistor of the PD. - allowing me to adjust it from 2.15v all the way upto 12v (i limited it to max of 5V).
The power input to the switching regulator is 12V, but it could easily use 5V.
I replaced the caps on the output with ZL types (high current, low internal resistance) - the same sort you find on motherboards for smoothing the CPU vcore supply. This was necessary to allow the board to be used with much higher output currents - it's easily handling the load of my DDR, even when running prime95 @ 3.6v, the mosfets on it dont even get warm, the output inductor gets slightly warm.
R2 and R3 are the Feedback Sense resistors, on this application note (btw this is for a HIP6066 but the same application circuit is used for hip6012)
http://www.intersil.com/data/an/an9722.pdf
I'm totaly stunned man... Real nice :toast:
I'll second that statement. :eek:Quote:
Originally posted by Fewture
I'm totaly stunned man... Real nice :toast:
:toast: :toast:
wow thats awesome, ill give $25 if u build me one ;)
or could u tell us how to make one of these with parts u can get from digikey and ratshack, like write up a little guide with the parts we need and the schematics :)
Yeah... I really don't have the knowledge of computers voltage lines to attempt something like that. You really should make a detailed thread to this. As I'm kind of at a loss for how you feed it to your mobo (I see two fet legs soldered... both positive?)
Now feedback sense I assume is supposed to show the chip how much voltage the ram is getting, so reducing the resistance to it makes it feed the ram less volts, and increasing the resistance makes it feed the ram more?
Really I am intensely interested as it looks very close to what I had ideally wanted to build for myself as a kind of adaptation of the OCZ device. ... With the help of people who know more about electronics than myself.
yah what he did is the same as the OCZ device, i was thinking of building one myself, but i dont have quite enough EE knowledge, but ive been reading upQuote:
Originally posted by Lithan
Yeah... I really don't have the knowledge of computers voltage lines to attempt something like that. You really should make a detailed thread to this. As I'm kind of at a loss for how you feed it to your mobo (I see two fet legs soldered... both positive?)
Now feedback sense I assume is supposed to show the chip how much voltage the ram is getting, so reducing the resistance to it makes it feed the ram less volts, and increasing the resistance makes it feed the ram more?
Really I am intensely interested as it looks very close to what I had ideally wanted to build for myself as a kind of adaptation of the OCZ device. ... With the help of people who know more about electronics than myself.
what that thing does is take 5v or 12v from the PSU, and use mosfets, and vreg chips to get the voltage to what he wants, lets say 2.8-3.6v for vdimm, and he prolly wired in a pot like we would on a regular vmod, to control the feedback resistance on that vreg. and the capacitors smooth out the voltage to prevent spikes
just he used a whole setup that was already premade just on another board and adapted it.
someone with EE knowledge should write a guide with parts lists and schematics, that would be sweet
Very nice piece of hardware :toast:
any chance you can post the sematics here, so we all can build our DIY membooster.
This board does differ from the OCZ booster tho....
The OCZ booster and the regulator circuitry already on my motherboard were of a linear regulator design. This type of regulation is very inefficient - it basically dumps the extra voltage as heat to get the voltage it wants, ie with 5v input and 3.3v output - it dumps 1.7v as heat (the amount of heat/power it dumps depends on the current but can be 10 watts or more etc)....this heat is generated by the mosfets...thats why there are heatsinks on the OCZ booster, even with those heatsinks tho the mosfets would probably overheat with high ram voltages (above 3.5v etc) powering 2 sticks or more - overheating will result in unstable voltages. Unless a fan is directed at them.
My motherboard mosfets got scorching when i did a 5v mod (changed the 3.3v supply to them to 5v), as it used a linear regulator design. Without a good fan on it, along with the heatsinks i stuck on, they would overheat.
This is why i cut out that section of KG7 - it is a 'switching' regulator, which is very efficient (80-90%) efficiency, which means it hardly gets warm at all, and can provide very stable voltages at much higher loads.
I'll provide more details shortly on just what i did to modify it. I could have built it up on my own PCB, but it woulda meant i have to design the pcb etc - which would need to be at least a dual layer design, not a problem (i design nd make pcbs's here often) - but i thought whats the point when i could just cut one already perfectly designed and built from that old kg7 lol :D
NICE LITTLE DEVICE YOU GOT THERE! :O
Now that is what you call xtreme!
Yes, froudeg. Please make a thread dedicated to your device. Also, a list of motherboards that use a switching regulator (or instructions on identifying them) would be very nice.
lots of Abit boards are switching based I believe... guess i'll have to chop up my dead BE6-II maybe :D
Man that sucks Jeff. Mine will be here tomorrow. Im goingt to test it on my MSI sig board. Mine's not on the list, but i hope that's just due to OCZ not having one.Quote:
Originally posted by Jeff
Hey Charlie... you want mine? :lol:
The first time I went to use it... it fried my Epox 8KDAJ motherboard(hopefully my 3200+ is ok). I set it up just like the manual says(even though an idiot could set this thing up without any manual) and when I went to adjust the Vdimm... POP... SMOKE... Vreg D.E.A.D.. Funny thing is... I'm the one that started this thread and as fate would have it... I'm the first to use it for what it was created for. :lol:
I'm serious about you having my Booster. It will be a while before I get another A64 mobo and I don't feel like getting my XP-m setup back out to play with right now.
If you want it... it's yours.
RYAN
if your reading this is that the case. Or was the MSI neo 250 GB testing and not working with the OCZ DDR booster???
I dont need a lot of volts. My OCZ 4200's do 285fsb 1:1 @ the MB's max of 2.82 actual volts. @ 3volts i can get 305 fsb 1:1 which i'll be happy. I'd love to use my good BH5's and put 3.3-3.4 to them. But i do like this setup and dont want to kill it.
I will be testing this with 5 other boards though. I see the IC7 is on the list but a IS7 or IS7G isnt on the list. and like i said i hope that because OCZ just doesnt have the board for testing.
This is a hell of a device like i said for testing before you do that volt mod to see if it's worth it.
Hopefully this wont be a very big "dead hardware thread", But your the first Jeff.
so is this booster available anywhere? Its sold out all over :(
Well it is a good sign that no one has reported any death yet using the booster, but given time, I'm sure someone will kill something eventually. Also isn't there a chance of killing the mem controller on the cpu with enough vdim? This is a good spirited thread by the way!
I thought Jeff whacked his hardware with it.
Froudeg, U ROCK! First the water cooled ram and now this!! GooD GOD MAN, start you own company and sell away bro!!! (or at least offer some to us :P)
forget high volts on that PC4200.Quote:
Originally posted by Tedinde
I dont need a lot of volts. My OCZ 4200's do 285fsb 1:1 @ the MB's max of 2.82 actual volts. @ 3volts i can get 305 fsb 1:1 which i'll be happy.
it doesn't even boot here at 3.1 volts.
if you will note, he said 3.0v..
Froudeg, that's some xtreme piece of hardware :D if you do a thread about it could you have some information in it how you find out if the motherboard uses a switching or linear regulator?
To bad you need a motherboard for Froudeg's solution...
Not that big of deal in my opinion. If I'm confident I can manage making it, I can probably pick up a board that will work out of refurbs for 15-35$