nachtfalke
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Posts posted by nachtfalke
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make a probe with FB mod and see the ovp value were it is , if the value is 1.45 -1.5v ( ovp trigger is different from card to card)is enought for cold water
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hd 5850 CU2 have same pcb design like HD5870 V2 ...
my friend Ramiro has configured the VID mod for HD5870 v2 to 1.4 -1.45v by default ..if you want more , can go with FB mod( 1.5 -1.6 will be enought resonable) or software ..smart doctor for exemple:D that is the easy way
vid mod is neccesary because you can go over ovp/ocp protection , if you want 1.45+ that is a must
here the mod: http://forum.lab501.ro/showpost.php?p=227301&postcount=173
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FB is pin8 , but you will have OVP trigger on that pwm , need VID mod anyway
datasheet http://www.hwgurus.com/Slike_forum/Quake/razno/uP6208.pdf
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so , you bench without know the voltages? , even voltmode nothing? but you hint 1110 mhz?..need to try this trick ..prehaps i will hint WR easily=)),... hd4850 don´t have software voltages control:D( just matrix ( itracker software)..and that is limited to 1.35v if i remember corectly form my card ) so you need voltmode evan on matrix , just saying you will need 1.55 -1,6v in gpu for 1ghz
what ram ic´s have you on the card? gpu load temps?
IF your card can do very very hard 1110mhz heavy load vantage gpu test ..i undestand that , BUT if can do 1110mhz , FOR SURE can do EASILY 1060 -1080mhz for exemple every time from day or night to make a film with all detail asked before als a proof!
thanks!
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sure:)
we want proof , i am satisfied with a film run vantage gpu test at 1060 ...i´m not ask for 1100+ because is obvious.
if you are a overclocker and you play with lot of hw ..y know allready that freq is not possible on water .. one day before he posted with same setup/coolin/bench- 980mhz on gpu ...and one day after he have a revelation at 1110mhz ?
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yes , i have 2 x hd 4850 msi OC with samsung ic´s and can over 1400 , but i want info from this guy not you:) even Qimonda ram with a strong mem controler can do 1350mhz, i have one
gainward cards it have NCP gpu pwm controller and lot of problems with OVP protection over 1.55v 
need to make it zombie:) -
sorry , but from mine experience with lot of cards and "accidentaly" about 10 x Hd 4850 ..this score it is imposibile on water..even chiller .
RV770 don´t scale up to 1100mhz with +temp on gpu , the best of cards can 1000-1020 mhz and 1.55v -1,6v , low ambient temperature.
1100mhz is almost the maximum of this chip on LN2 ( and remember lot of these chip´s work full POT ), and you say that score is on water??
for me does´t matter what do you say but is not fair play here ..
i´m currios have you hard modded? samsung or hynix ic ram´s? what gpu voltage and mem?
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same for mine recent submision ..
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does´t matter what kind of chiller do use ...that is a extreme cooling solution , even you cooling with + degresse.
extreme cooling - cooling that is NOT dependent of ambient temperature.
so in this case you have a refrigerant compressor inside with a refrigerant gass ( mostly specifical for that usual chiller - R134A gass) ...so the compressor cooling your water loop constantly at that temperature that you will set from electronic thermostat...., if you moded that chiller and splint directly off the thermostat( put directly compressor on AC without thermostat temp controler) ...you will be able to cooling under sub0 ... (R134A can do ~ -26.2*C( boiled point) )
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asus 8800GT top don´t need another vrm , because it have one enought powerfull for G92 chip .
it have L6713A pwm ..just moded fb pin and ocp mod .
the "secret" is to put a jummper or dip switch on the FB wire ...boot in windows with jummper removed ( without FB mod- on), and then in OS put the jummper back ..then you will be able to inceerese voltages ...without OVP trigger...
for the mem , you need REVERSE vmod , because qimonda ic´s are very difficult to bench with lot of voltages , need degreese the voltage ..just moded the FB pin to + vram vrm output , and you will be able to reverse voltages .. measure before the ressistance between the fb pin and out+, and then put a trimmer x 20 over that value
good look!
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Q741A322 - was in a OEM acer pc
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thanks!
very hard to find something like this : vid 1.2v
;525fsb seems like a wall at -54* on my stage , over 1.55v not scalling anymore
with a better cooling(ln2) can be a great chip:) anyway not time for all:)
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nice! what VID it have the cpu?
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4930k@ 3338B804
boot also 5 ghz 6/12ht 1.450v.
i will try under LN2 soon.
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really nice work:) and nice epower too:D
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need full mod vgpu( vid mod) , vram , ocp ram , pll mod , cbb mod ..and ofcourse CS bios.
my card can over 1300 ram ..i tested to 1350 with small artifacts ...but i dont´t pushed vram over 1.9 .. with 2 -2,05v ran without issue for sure:)
just need found a better cpu
and rerun again -
, the card is very good and very low volt , i don´t push for more because anyway in 2k1 is enought 1400 , is more important the ram frecq need a good cpu
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Thanks Vivi Hope that some parts work on Asus DC2 too^^
for you : http://kingpincooling.com/forum/showthread.php?p=26701#post26701
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yes , you are:)
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thanks guys
ivy bridge cpu´s loose the PCI-e x16 lan from 2:0 to 1:1 on cold ( when you running full pot is not a rule but i had lot of issue with pci lan on ivy) ..that is the FIRST reason because the Nature is so low( and nature is very very important at the overall score) , on hasfail this issue is not anymore ...but problem with hight clock´s
cb /cbb rulesand my cpu is a 4670k ,not 4770k ...this last have 8mb L3 cache and low GT is more efficient, score become bigger at same clock compared with 4670k:D
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i know , if you have already a good and cheap source of LN2 ...in not anymore rentable SS or cascade ( prehaps only a SS just testing cpu´s if scaling good on cold), but for me LN2 is very expensive almost 4 euros Liter in my own dewars.
if in the future i found a cheap source of nitrogen ... i will selling mine unit´s ...like you good prices for buyers
ASUS HD 5850 DirectCU II - volt mod assistance required! :)
in Graphics cards
Posted · Edited by nachtfalke
that can be OCP ( over current protection) before OVP( over voltage protection) , but the pwm it have both, i think the OVP will trigger 1.38 -1.4v
OCP can be modded from pin 2 ( imax2) to GND with a resistor( see datasheet) , but like as said before will push then in OVP , so last chance is VID mod anyway:)