PSU with SMBus

[schulsi]

Hello,

I want to build a PC/Workstation with an old server mainboard with dual CPU. So I bought all hardware 2 Xeon CPUs, ECC DDR3 RAM and a Intel s5520hc Mainboard and installed it. But with both CPUs installed the system doesnt boot up.

After a bit of googling I found out that the mainboard has an SMBus Connector that has to be connected. Otherwise the mainboard will only boot with one CPU installed.

 

So now my question: Can you suggest any PSU with dual CPU connector and a SMBus Connector.

I didnt find anything and have no clue what to do. Or do you have any idea how to "hack" the SMBus?

 

Thanks for the help.

schulsi

[litaprog]

The Corsair AX series seems have that connector. The new AX1600 went to miniUSB connector as I see on pictures, the old ones have very similar to the motherboard's.

 

https://www.corsair.com/us/en/Categories/Products/Power-Supply-Units/axi-series-config/p/CP-9020057-NA

 

[Juular]

AX doesn't, AX-i does. As do RM-i and HX-i. But i'm not knowledgeable enough to say if Corsair's iCUE is actually SMBus or not.

Maybe @jonnyGURUknows or can ask someone from software engineering team.

[Guest]

Quote

 

System Management Bus (SMBus) Specification Version 2.0 (August 3, 2000) compliant, PMBus Power System Management Protocol Specification Part 1 General Requirements, Transport and Electrical Interface Revision 1.2X (6 September 2010) compliant, PMBus Power System Management Protocol Specification Part II – Command Language Revision 1.2 (6 September 2010) compliant and PMBus

 

 

Quote

Hope that's enough to get you going.

 

[Martin3]

Seems Corsair is moving from the Digital iLink (I2C SMBUS/PMBUS for IPMI monitoring cards) to USB-based connection (for iCue software):

 

Matrix:

HX750i, HX850i, HX1200i have both 4-pin PMBUS (PSU SMbus) cable called Link cable (Corsair Link Digital Interface Cable) and also miniUSB to USB 9-pin header cable
HX1000i, HX1500i have only USB type-C to USB 9-pin header cable
RM1000i, RM850i, RM750i, RM650i have both 4-pin PMBUS (PSU SMbus) cable called Link cable (Corsair Link Digital Interface Cable) and also miniUSB to USB 9-pin header cable
AX860i has only 4-pin PMBUS cable called Link cable
AX1200i has only 4-pin PMBUS cable called Link cable
AX1600i has only miniUSB to USB 9-pin header cable

AX1200i has I2C PMBUS digital comm connector, which can be hooked to an IPMI card through 80cm PMBUS Cable (4PIN) aka Corsair Link™ Digital interface cable, possibly sold separately as https://www.corsair.com/us/en/p/pc-...-8920117/axi-i2c-800mm-pmbus-cable-cp-8920117. Via PMBUS one can not only read voltage ad current but also turn on/off the powersupply.
AX1200i also contains bundled I2C to USB convertor called Corsair Link™ USB Dongle, possibly sold separately as https://www.corsair.com/us/en/p/pc-components-accessories/cp-8920019/ax-1200i-860i-760i-usb-to-i2c-adapter-cp-8920019

https://www.corsair.com/us/en/p/psu/cp-9020008-na/ax1200i-digital-atx-power-supply-1200-watt-80-plus-platinum-certified-fully-modular-psu-cp-9020008-na
https://res.cloudinary.com/corsair-pwa/image/upload/corsairmedia/sys_master/productcontent/49-000142_revAB_AX1200i.pdf

For unclear reason the AX860i and AX1600i models have the USB connector which requires you to connect it to an internal USB 9-pin header (80cm USB cable (9PIN)), no I2C PMBUS. Than iCUE software can read it if Win are running at all.
https://www.corsair.com/us/en/p/psu/cp-9020087-na/ax1600i-digital-atx-power-supply-1600-watt-fully-modular-psu-cp-9020087-na
https://res.cloudinary.com/corsair-pwa/image/upload/corsairmedia/sys_master/productcontent/AX1600i_C14_Manual_Web.pdf

Likewise HX1000i and HX1500i have the USB connect and again, you must connect them to the internal USB 9-pinheader:
https://www.corsair.com/us/en/p/psu/cp-9020261-na/hx1500i-fully-modular-ultra-low-noise-platinum-atx-1500-watt-pc-power-supply-cp-9020261-na
https://www.corsair.com/us/en/p/psu/cp-9020259-na/hx1000i-fully-modular-ultra-low-noise-platinum-atx-1000-watt-pc-power-supply-cp-9020259-na

The RMi series has both PMBUS and USB monitoring outputs.
https://res.cloudinary.com/corsair-pwa/image/upload/corsairmedia/sys_master/productcontent/RMi_Manual.pdf

How do I know this? Because I am looking for a powersuppluy which can be hooked to the ASUS IMPI card with 5-pin connector:
https://dlcdnets.asus.com/pub/ASUS/mb/Add-on_card/IPMI_Expansion_Card_EM_WEB_EN.pdf
The Installation Guide of IPMI Expansion Card for all Compatible motherboards. | Official Support | ASUS USA
https://dlcdnets.asus.com/pub/ASUS/mb/Add-on_card/IPMI_EXPANSION_CARD/Compatible_Model_List.pdf

 

[F1rby]

@Martin3, I'm inquisitive about where you landed on your analysis. I believe I'm in the same situation (building an ASUS MB, specifically the Pro WS W680-ACE, using the same IPMI Card, and looking for an appropriate ATX PSU with PMBUS compatibility.) Did you select between those Corsair PSUs and successfully build using the Asus IPMI Card?