• Welcome to Andy's Workshop Forums. Please login or sign up.
 
December 05, 2019, 10:14:32 pm

News:

SMF - Just Installed!


Z820 mobo hack. anyone?

Started by davidK, February 18, 2016, 12:52:14 pm

Previous topic - Next topic

Andy Brown

Quote from: glauder on February 13, 2017, 07:18:18 pm
I still have to troubleshoot the warnings, but press F1 and ok.

I never bothered eliminating them and to this day I'm still pressing F1 on startup!
It's worse than that, it's physics Jim!


glauder

February 16, 2017, 06:30:41 am #17 Last Edit: February 16, 2017, 07:14:31 am by glauder
Quote from: davidK on February 14, 2017, 01:32:52 pm
dear glauder - bravo and grazie!
have u considered taking that original PS apart to clone it with regular PS? i can imagine more then just 5-11v difference, so, someone tech savvy should give a try.
cheers.


No i dont considred it. The original power supply have 1125w and 90% eficiency. Power supply for Z820 has got a lot of power at 12v rails , (Z820 use only 12v rail). ATX power supply with this feature are very expensive and the original cost me cheap, only 150U$ in my country.
I plan to redo the cables, I'm extracting the pinout from the original cables.
And good news the 18 pin connector pinout has been posted on the HP foum:

https://h30434.www3.hp.com/t5/Business-PCs-Workstations-and-Point-of-Sale-Systems/HP-z420-motherboard-18-pin-layout/td-p/5835021


davidK

yeah, 12v rail, makes sence. care to share the purchase link for 1125@150ish? i couldn find 1125 on US ebay less then 350ish.
i ve foud a deal at amazon for 275USD /case+850/:
https://www.amazon.com/Z820-Chassis-Power-Supply-642163-003/dp/B018WRL6I2/ref=sr_1_2?ie=UTF8&qid=1487253780&sr=8-2&keywords=z820+power

hoping 850 will cover 2x2670/ram and single 1080.
cheers.

glauder

February 16, 2017, 07:30:12 am #19 Last Edit: February 16, 2017, 07:42:18 am by glauder
Quote from: davidK on February 16, 2017, 07:05:30 am
yeah, 12v rail, makes sence. care to share the purchase link for 1125@150ish? i couldn find 1125 on US ebay less then 350ish.
i ve foud a deal at amazon for 275USD /case+850/:
https://www.amazon.com/Z820-Chassis-Power-Supply-642163-003/dp/B018WRL6I2/ref=sr_1_2?ie=UTF8&qid=1487253780&sr=8-2&keywords=z820+power

hoping 850 will cover 2x2670/ram and single 1080.
cheers.



I bought at mercadolivre.com a brazilian auction site. I was lucky because I bought when I posted that first message and there were no chinese cables, so the power supply dont sell well. The seller was a year advertising and lowered the price for me buy.
Who does not buy the cabinet, i recommend getting a Z420 motherboard is ATX size dont need case mod. The Z820 need case mod and has serious heat problems, the memories fry! I had to buy nine 12cm fans to put on the sides of the cabinet, plus two 14cm inside and one 8cm fan to blow air into the power supply. Not counting the two hyper 212s for the cpus.




glauder

Quote from: Andy Brown on February 14, 2017, 02:25:24 pm
Quote from: glauder on February 13, 2017, 07:18:18 pm
I still have to troubleshoot the warnings, but press F1 and ok.

I never bothered eliminating them and to this day I'm still pressing F1 on startup!


The usb and 1394 dont is critical, but the fan error i need solve. I'm doing reengineering in the fan conector, i already buy the male connector in digykey, end of the month should be coming.

davidK

February 25, 2017, 09:25:52 am #21 Last Edit: February 26, 2017, 01:02:38 am by davidK
i have ended up getting case with 850 psu. now stuck at heathinks.
is the re any alternatives to expensive original (G0J48AA) ones?
thx.
P.S. have found this rather questionable alternative. dont feel enthusiastic tho:
http://www.ebay.com/itm/HEATSINK-FOR-HP-Z820-WORKSTATION-636164-001-with-Fan-647113-001-/232232385612?hash=item361220fc4c:g:Dg8AAOSwopRYmeVJ

P.S.S. ram is another point. got myself Atech 32GB KIT (2 x 16GB) DIMM DDR3 ECC Registered PC3-12800 1600MHz Dual Rank RAM Memory. with single cpu (ES 2670) post reports a ram error in ANY upper slot (5-8). modules swap ain help. similar issue could be found on hp forums using other ram manufactures. perhaps glauder could comment on this. pls share ram options who have tested already. cheers.

glauder

Quote from: davidK on February 25, 2017, 09:25:52 am
i have ended up getting case with 850 psu. now stuck at heathinks.
is the re any alternatives to expensive original (G0J48AA) ones?
thx.
P.S. have found this rather questionable alternative. dont feel enthusiastic tho:
http://www.ebay.com/itm/HEATSINK-FOR-HP-Z820-WORKSTATION-636164-001-with-Fan-647113-001-/232232385612?hash=item361220fc4c:g:Dg8AAOSwopRYmeVJ

P.S.S. ram is another point. got myself Atech 32GB KIT (2 x 16GB) DIMM DDR3 ECC Registered PC3-12800 1600MHz Dual Rank RAM Memory. with single cpu (ES 2670) post reports a ram error in ANY upper slot (5-8). modules swap ain help. similar issue could be found on hp forums using other ram manufactures. perhaps glauder could comment on this. pls share ram options who have tested already. cheers.


Your cabinet has the fan assemby? If you do not have the rams overheat and make mistakes. I had this problem and solved with cooling.
The Z820 has the VRM heatsink very near to the cpu0 rams.
My ram is this:

http://www.ebay.com/itm/48GB-12x-4GB-HP-500658-B21-500203-061-501534-001-PC3-10600R-DL360-G6-G7-RAM-/182461591849?hash=item2a7b8ef129:g:e2wAAOSwtfhYq2N5

I buy it for Z800, but I gave up on him and then I got another 16GB for Z820. Low voltage memories (1,35v) are useless, the Z800 and Z820 use them at 1.5v so they spend the same energy as ordinary memory.

davidK


davidK

here is how it looks so far. waiting for 2 original heatsinks to install teh fan box back. couldnt find any OEM  solution so far.
single 16gb ram installed. second ram in any upped slot gives error, bioas cant c it anyways. thinking of getting exact matched hp part ram set.
cant put the gpu without removing the metal thingie.
enjoy pics )









norbertano

Hi there. If you interesting, one aliexpress seller sells adapter for usual ATX power supply but the price is very high
https://www.aliexpress.com/store/product/PSU-ATX-Power-Conver-Cable-24-Pin-to-18-Pin-8-Pin-to-8-8-6/215107_32778125250.html?spm=2114.12010612.0.0.5294Zq
If someone have power cable for CPU0,CPU1 and memory (hp p/n 647111-001), I ask him to help with pinout, I've tried to probe signals with multimeter but I'm not sure about three contacts

3DPrinter.ua

Hi
Anyone find how connect this motherbpard to standart ATX power supply?