nachtfalke

up!

for sale: 1. Asus Rampage Extreme 775 LGA in perfectly working condition like new , package-most of accesories are here see pic ( mising only :I/O shield and lcd panel , few sata2 cable, IDE cable) never used on extreme cooling price: 150 ***8364; - SOLD!!! 2. Asus Matrix GTX580 , perfectly working condition and full package used only with original stock cooling , never removed. price: 110 ***8364; items location DE shipped only in Europe via DHL with insurance till 500***8364; for DE : 6,90***8364; for another EU land : 17***8364; for another country from europe but not EU land , ask before! accept only WU or bank payment , fees and shipping are on you , thanks!

R507 is compatible with R404a and viceversa , so if you had a compressor design for R404a , you can charge it with R507 as a designed refrigerant for it! the most powerfull single stage are made with rotaryes , because they can endure better liquid refrigerant presence( also they had from manufacture included suction accumulator) , they endure better gas temp in discharge line and more resistence and stable temps on evap at hight ambiental temps! right rotaryes for a single stage are r407c rotaryes and charge with R507 . R507 are the best/performant LBP( low back pressure) refrigerant to use intro SS , also R407c rotaryes accept very well R507 , because R507 works and mix very well with POE oil with visosity 56 , 68 , 72 ,100 specify for R407c and R410a that are used into AC system. R404a works well( R507 aswell) with POE with low visosity iso 22 , 32 etc , but into rotary with hight POE viscosity R507 is better and irreplaceable. rotaryes design for R410a refrigerant( HBP - hight back pressure) , worsks also very well with R507 , but compared vs R407c rotaryes at same btu/h they are small at cm³/rev ( ccm) . ex: 10.000 BTU/h R407c rotary = 16,4ccm 10.000 BTU/h R410a rotary = 12 ccm R410a rotaryes are best way when you wanted to use HBP refrigerant( R410a , R23, R1150 , R50 etc..) in 2 ,3 stage cascade in the second stage specify for hight back pressure refrigerant:) like i did in my build´s here: http://www.xtremesystems.org/forums/showthread.php?290110-2-stage-Rotary-Cascade-first-cascade-build http://www.xtremesystems.org/forums/showthread.php?290159-Big-Rotary-SS-) http://forum.lab501.ro/showthread.php?t=14259 http://forum.lab501.ro/showthread.php?t=14511

NL11F is designed for R134a , but others builders use R404/R507 to charge it , because at lower boiled points. also as phase change builder i´m not agree with this solution because R134a use another pressure chart compared with R404/R507 , even they use same oil ( POE- polyolester - sintetic oil). NL11F it has only 11ccm , so it is very small compressor and very silent but to small for heavy load that used on hardware today , on my experience you can tunning this sistem up to 300W dummy load with -20 to -25* C evap temps , and remember you must change (or add another ) condensor because original is to small for 300W load . if your unit it has a leack and you have more than few weeks , you should change also OIL , because is contaminated in contact with air , POE oil is hygroscopy , if you expose more than 30min without capped or inert gass into will have moisture and ruin hole OIL. if recharge the unit , should change filter dryer to new one , a deep vacumm is a must till 250 -200 microns on your gauge , charge liquid refrigerant intro liquid line acces valve and then complet with vapours/gas into suction/ service port - but add refrigerant with evaporator loaded , so you will need a load tester also i don´t know if the builder that build your SS use a suction accumulator in suction line , if not you should pay attention to NOT overcharging the sistem , reciprocating compressor are weak to liquid refrigernat flood back , and compressor will die in short time!

you need VID mod anyway , because with any software you hint ovp limit on these cards. HD 4890 TOP was done in 2 variants: a) reference design with 2x volterra VT1165mf pwm and black pcb , 1x6pin + 1x8 pin power , MLCC cap back gpu side b) analog custom design , 100% asus design ...here need anyway hw voltmode HD 5850 TOP use uP6208 pwm , witch it had OVP trigger , only way to bench these card over 1.5vgpu need VID mod , if you can´t configure the mod ..contact me. regards

thanks:)

nice

nice work!! i recomanded to change teflon with threadlocker LOCTITE 243( medium strenght)

edit your score 06:328s not 032s!!

bugged nature!!!!

is not about only ic´s ddr here, that mem controller inside gpu are golden to hint that ddr freq ...and very very hard to get that..

first of all they are all "phase change " : chillers , SS , autocascade , cascade... second: if you know bench , you will bench very good on chiller ( ofcourse good chiller..with a large compressor aswell and R507 refrigerant gas) , many vga´s will response very good at lower temp like 0 -5 degrees load , will be able to bench vga´s in 2way , 3 way and 4 way and ofcourse the cpu in same loop as wished! , also the loop configuration can include 1 or more pump´s , for better flow and ofcourse better load temp´s. also a SS will be a better choice if you wanted push more the cpu. PS: i speak about a custom waterchiller ..no hailea , and bla bla bla stuff like this!

for me that bios won´t work anyway , better was stock bios ...

good look with your 3d test:)

yes, 20k VR from pin6 to GND is OK , if you have 10K VR also is good!! it is uP6101 pwm , if you have ~900ohm from pin 6 to GND is APW7065 ddr voltage check points you get from capacitors left from black choke!

yes, he is the ddr pwm i don´t have the card here , but should be uP6101 or APW7065 both with FB to pin6 -please measure if the pin 3 on that pwm is GND -then measure the pin6 (FB ) to GND ..that resistence x20 = VR value , 20k VR should be

wrong "pwm" for DDR:D uP6181 are 12v mosfet drivers with output disable for a single phase synchronous-rectified buck converter! ddr pwm are located on the front pcb , right from speaker(buzz1)

Yes, i use both Z87OCF and Z97ocf Z97 ocf was dead when i use LN2 on it and G3258 cpu , 2 mosfets on back side was kaput ..i recived a new board from RMA 3 days ago .. Vccin 2,2v but works very well aloso with 2,15v

yes,..but the NCP5388 is a pwm evil=)) so only chance was to zombified card:)

thanks! , that was only vga pretest , almost my cascade are ready:)i´m waiting for R1150 gas!

you can play with CB if powered the card with external power board , but then will have strange Cold Slow ... anyway will be better result!

thanks guys ! was a battle to make that 8800gtx vrm fullyworked and i did it:D because NCP onboard pwm controller it has all kind of protection ( ocp , ovp , uvp) ..that is the reason i make it zombie! actually card ran 1130mhz:Don my stage! also both stages are made by me!

same here , don´t need strong cpu frecv for G84 , 5,5ghz still enought , the limitation came from mem frecv , need binned card..

syst info "disable" in not allow anymore

nice input! still lot of work with this board tunning the bios for best mem performance , gigabyte from manny years haven´t a complete product...