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Two CPU 8 pin connectors

Englishman
By Englishman
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I've got a board coming that requires two CPU 8 pin power connectors, and i only have the one 8pin eps cable from my power suply. As far as i can find the pci-e ext power cables are keyed differently so won't work for me there, and any power supplies that have the two 8 pin CPU ones are amazingly expensive.

 

Is it possible to find molex to 8pin for the CPU?

 

Or would making use of the splitting nature on the eps 8 pin connector and using two 4pin to 8pin adapters work? Would doing that not draw too much current through the cables?

 

Cheers!

Desktop: i5 2500k @ 4.8GHz stable, 16GB Corsair XMS3, Asus P8P67, Corsair H50 AIO Liquid cooler (worst decision in the build), Corsair GS600, Intel 520 180GB, and to top it all off... An nvidia gt630!

Laptop: Dell Vostro 3360, i7 3517U, 8GB, 120GB Samsung 840 Evo, Intel 7260 Dual band AC, Dell 4G wireless modem

Workstation(in the making): Two Xeon X5650 processors (24 threads!), Supermicro X8DTE-F,56 GB ECC ram (more to come, a lot more), very old 'industrial computer' case, supermicro heatsinks (amazingly silent) and as for the rest, i've not bought it yet!

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You don't need to have both plugged in, it's only for very serious overclockers.

CPU: i7 5820K 4.0GHz @1.15V | MOBO: Asus X99 Sabertooth | GPU: Gigabyte Windforce GTX 980Ti, LTT Orange | CASE: NZXT H440 Black 2015 | COOLER: Noctua NH-D15S w/ LTT Fans | RAM: 32GB Patriot 3000MHz | STORAGE: 512GB Samsung 950 Pro, 960GB Sandisk Ultra II 3 x 8TB Seagate HDD's | PSU: 750W Seasonic X series, black / orange cablemod cables| Monitors: 3x Asus VX24AH's | AUDIO OUT: Microlab SOLO 8C, Sennheiser HD 650's, Audio engine D1 Amp / DAC | AUDIO IN: Blue Snowball | Keyboard: CM Storm QuickFire TK MX Green | Mouse: Logitech G900 Proteus Spectrum + RSI Extended Mouse Pad | PCPP Link: http://nz.pcpartpicker.com/list/hPjFd6

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What motherboard requires two 8-pin CPU cables? No PSU has more than 1 of those cables.

Motherboard: Gigabyte Z97X-UD3H CPU: i5 4690k GPU: Gigabyte GTX 970 4GB PSU: EVGA Supernova G2 750w RAM: Corsair vengeance 8GB @ 1600mhz Case: Fractal Design define R5 CPU-Block: EK-Supremacy Acetal GPU-Block:EK-FC970 GTX WF3 Pump: Alphacool VPP655  Reservoir: EK-XRES 140 D5 HDD: WD Blue 1TB Keyboard: Ducky shine 3 /w mx black

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Posted

I've got a board coming that requires two CPU 8 pin power connectors, and i only have the one 8pin eps cable from my power suply. As far as i can find the pci-e ext power cables are keyed differently so won't work for me there, and any power supplies that have the two 8 pin CPU ones are amazingly expensive.

 

Is it possible to find molex to 8pin for the CPU?

 

Or would making use of the splitting nature on the eps 8 pin connector and using two 4pin to 8pin adapters work? Would doing that not draw too much current through the cables?

 

Cheers!

You should only need the second 8 pin if you're doing some serious overclocking. /I think. 

 

P.s. The EVGA G2 750 w comes with 2 cpu 8 pins, and its only like $100. So, not all of them are amazingly expensive. 

PSU Tier List | CoC

Gaming Build | FreeNAS Server

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i5-4690k || Seidon 240m || GTX780 ACX || MSI Z97s SLI Plus || 8GB 2400mhz || 250GB 840 Evo || 1TB WD Blue || H440 (Black/Blue) || Windows 10 Pro || Dell P2414H & BenQ XL2411Z || Ducky Shine Mini || Logitech G502 Proteus Core

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FreeNAS 9.3 - Stable || Xeon E3 1230v2 || Supermicro X9SCM-F || 32GB Crucial ECC DDR3 || 3x4TB WD Red (JBOD) || SYBA SI-PEX40064 sata controller || Corsair CX500m || NZXT Source 210.

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Posted

What motherboard requires two 8-pin CPU cables? No PSU has more than 1 of those cables.

Xpower and One of the ROG boards I believe (don't quote me on that though). 

 

The EVGA G2 750w does. 

PSU Tier List | CoC

Gaming Build | FreeNAS Server

Spoiler

i5-4690k || Seidon 240m || GTX780 ACX || MSI Z97s SLI Plus || 8GB 2400mhz || 250GB 840 Evo || 1TB WD Blue || H440 (Black/Blue) || Windows 10 Pro || Dell P2414H & BenQ XL2411Z || Ducky Shine Mini || Logitech G502 Proteus Core

Spoiler

FreeNAS 9.3 - Stable || Xeon E3 1230v2 || Supermicro X9SCM-F || 32GB Crucial ECC DDR3 || 3x4TB WD Red (JBOD) || SYBA SI-PEX40064 sata controller || Corsair CX500m || NZXT Source 210.

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Xpower and One of the ROG boards I believe (don't quote me on that though). 

 

The EVGA G2 750w does. 

I'm getting too old for this shit.

Motherboard: Gigabyte Z97X-UD3H CPU: i5 4690k GPU: Gigabyte GTX 970 4GB PSU: EVGA Supernova G2 750w RAM: Corsair vengeance 8GB @ 1600mhz Case: Fractal Design define R5 CPU-Block: EK-Supremacy Acetal GPU-Block:EK-FC970 GTX WF3 Pump: Alphacool VPP655  Reservoir: EK-XRES 140 D5 HDD: WD Blue 1TB Keyboard: Ducky shine 3 /w mx black

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This isn't for a gaming/enthusiast type board, it's a dual processor supermicro board, pretty sure i need both or bad things will start to happen to my nice xeons

Desktop: i5 2500k @ 4.8GHz stable, 16GB Corsair XMS3, Asus P8P67, Corsair H50 AIO Liquid cooler (worst decision in the build), Corsair GS600, Intel 520 180GB, and to top it all off... An nvidia gt630!

Laptop: Dell Vostro 3360, i7 3517U, 8GB, 120GB Samsung 840 Evo, Intel 7260 Dual band AC, Dell 4G wireless modem

Workstation(in the making): Two Xeon X5650 processors (24 threads!), Supermicro X8DTE-F,56 GB ECC ram (more to come, a lot more), very old 'industrial computer' case, supermicro heatsinks (amazingly silent) and as for the rest, i've not bought it yet!

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What motherboard requires two 8-pin CPU cables? No PSU has more than 1 of those cables.

Almost every high end PSU will come with two of these.

NEW PC build: Blank Heaven   minimalist white and black PC     Old S340 build log "White Heaven"        The "LIGHTCANON" flashlight build log        Project AntiRoll (prototype)        Custom speaker project

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Ryzen 3950X | AMD Vega Frontier Edition | ASUS X570 Pro WS | Corsair Vengeance LPX 64GB | NZXT H500 | Seasonic Prime Fanless TX-700 | Custom loop | Coolermaster SK630 White | Logitech MX Master 2S | Samsung 980 Pro 1TB + 970 Pro 512GB | Samsung 58" 4k TV | Scarlett 2i4 | 2x AT2020

 

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Is there any way to get around buying a new power supply? Using adapters, custom botch-jobbing a cable in, going all out and soldering a new set of cables in entirely?

Desktop: i5 2500k @ 4.8GHz stable, 16GB Corsair XMS3, Asus P8P67, Corsair H50 AIO Liquid cooler (worst decision in the build), Corsair GS600, Intel 520 180GB, and to top it all off... An nvidia gt630!

Laptop: Dell Vostro 3360, i7 3517U, 8GB, 120GB Samsung 840 Evo, Intel 7260 Dual band AC, Dell 4G wireless modem

Workstation(in the making): Two Xeon X5650 processors (24 threads!), Supermicro X8DTE-F,56 GB ECC ram (more to come, a lot more), very old 'industrial computer' case, supermicro heatsinks (amazingly silent) and as for the rest, i've not bought it yet!

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Is there any way to get around buying a new power supply? Using adapters, custom botch-jobbing a cable in, going all out and soldering a new set of cables in entirely?

As str_mape said, you don't need to have both plugged in, it's only for very serious overclockers.

Motherboard: Gigabyte Z97X-UD3H CPU: i5 4690k GPU: Gigabyte GTX 970 4GB PSU: EVGA Supernova G2 750w RAM: Corsair vengeance 8GB @ 1600mhz Case: Fractal Design define R5 CPU-Block: EK-Supremacy Acetal GPU-Block:EK-FC970 GTX WF3 Pump: Alphacool VPP655  Reservoir: EK-XRES 140 D5 HDD: WD Blue 1TB Keyboard: Ducky shine 3 /w mx black

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As str_mape said, you don't need to have both plugged in, it's only for very serious overclockers.

Overclocking isn't even in the frame with this board, it's a server one...

Desktop: i5 2500k @ 4.8GHz stable, 16GB Corsair XMS3, Asus P8P67, Corsair H50 AIO Liquid cooler (worst decision in the build), Corsair GS600, Intel 520 180GB, and to top it all off... An nvidia gt630!

Laptop: Dell Vostro 3360, i7 3517U, 8GB, 120GB Samsung 840 Evo, Intel 7260 Dual band AC, Dell 4G wireless modem

Workstation(in the making): Two Xeon X5650 processors (24 threads!), Supermicro X8DTE-F,56 GB ECC ram (more to come, a lot more), very old 'industrial computer' case, supermicro heatsinks (amazingly silent) and as for the rest, i've not bought it yet!

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Adapters exist, like this one here http://www.memoryexpress.com/Products/MX17077

 

Personally I'd recommend a new PSU though, something that was designed to be used in a scenario such as this.

INTEL CORE i5-7600K | ASUS ROG STRIX B250i GAMING | CRUCIAL BALLISTIX SPORT LT 16GB | EVGA GTX 970 SC | EVGA B3 550W
SAMSUNG 850 EVO 250GB | CRYORIG M9i | BE QUIET! PURE WINGS 2| FRACTAL DESIGN DEFINE NANO S

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Adapters exist, like this one here http://www.memoryexpress.com/Products/MX17077

 

Personally I'd recommend a new PSU though, something that was designed to be used in a scenario such as this.

That looks ideal, thanks! I couldn't find any anywhere

 

And as for a new power supply... eh, money.

In the long run i'll probably get a nice redundant setup going, but for now this will have to do

Desktop: i5 2500k @ 4.8GHz stable, 16GB Corsair XMS3, Asus P8P67, Corsair H50 AIO Liquid cooler (worst decision in the build), Corsair GS600, Intel 520 180GB, and to top it all off... An nvidia gt630!

Laptop: Dell Vostro 3360, i7 3517U, 8GB, 120GB Samsung 840 Evo, Intel 7260 Dual band AC, Dell 4G wireless modem

Workstation(in the making): Two Xeon X5650 processors (24 threads!), Supermicro X8DTE-F,56 GB ECC ram (more to come, a lot more), very old 'industrial computer' case, supermicro heatsinks (amazingly silent) and as for the rest, i've not bought it yet!

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So you're buying/got a dual socket server grade board but can't afford a power supply?

CPU: AMD Ryzen 7 3700X - CPU Cooler: Deepcool Castle 240EX - Motherboard: MSI B450 GAMING PRO CARBON AC

RAM: 2 x 8GB Corsair Vengeance Pro RBG 3200MHz - GPU: MSI RTX 3080 GAMING X TRIO

 

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So you're buying/got a dual socket server grade board but can't afford a power supply?

Yep, that's me! It's a budget system, so if i can not buy something and bodge what i already have i will.

 

There exist PCI-E Power to EPS12V which I'd very much recommend over 4-pin Molex to EPS12V. 4-pin Molex aren't really designed for providing all too much power.

I was thinking that the single 12v cable on molex would be a bit stretched to provide for a whole 8pin eps connector, yeah. I'll get looking for one of those adapters, sounds like a much better plan.

Desktop: i5 2500k @ 4.8GHz stable, 16GB Corsair XMS3, Asus P8P67, Corsair H50 AIO Liquid cooler (worst decision in the build), Corsair GS600, Intel 520 180GB, and to top it all off... An nvidia gt630!

Laptop: Dell Vostro 3360, i7 3517U, 8GB, 120GB Samsung 840 Evo, Intel 7260 Dual band AC, Dell 4G wireless modem

Workstation(in the making): Two Xeon X5650 processors (24 threads!), Supermicro X8DTE-F,56 GB ECC ram (more to come, a lot more), very old 'industrial computer' case, supermicro heatsinks (amazingly silent) and as for the rest, i've not bought it yet!

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Is there any way to get around buying a new power supply? Using adapters, custom botch-jobbing a cable in, going all out and soldering a new set of cables in entirely?

 

You don't need to plug in the second 8 pin unless you are running something like a dual processor configuration for which I would highly recommend you buy a good power supply like the EVGA one. If your board has two 8 pins and only has a single processor it is probably just to regulate the voltage going into the processor at very high levels of overclocking, which if you are doing you should only do with expensive power supplies. 

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Xpower and One of the ROG boards I believe (don't quote me on that though). 

 

The EVGA G2 750w does. 

MSI Big Bang XPOWER 2. http://www.newegg.com/Product/Product.aspx?Item=N82E16813130626 It's not uncommon for high end motherboards.

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  • 7 months later...
Posted

I plan on using the supermicro board with two x5450s. My power supply is only 450 watts which is enough for both the processors and a gtx 750ti, but i only have one pin EPS power. If you used molex adapters, did they work? Or should i get a splitter like this?$_57.JPG

MAIN RIG: Dell Precision T5500 -CPU: Intel Xeon W5580 (4c,8t@ 3.2ghz,turbo 3.46) -MOTHERBOARD: Dell Precision T5500 OEM -RAM: 16gb ECC DDR3 FBDIMM (Hynix) -GPU: Gigabyte GTX 770  OC WINDFORCE X3 -Case: Dell Precision T5500 OEM -STORAGE: 240gb ADATA Premier SP550 (OS, Programs), 2x 500GB WD Caviar WD5000AAKS (Games, Files) (RAID 0) -PSU: Dell Precision T5500 OEM (875w) -DISPLAY(S): Primary: Acer AL2016w (1680x1050), Left and Right: Gateway FPD1976W (1440x900), Extra displays around the room: 42" Vizio TV (1920x1080) -COOLING: Dell Precision T5500 OEM -KEYBOARD: Logitech G710+ -MOUSE: Logitech G502 Proteus Core -SOUND: Logitech x320 and Razer Electras -OPERATING SYSTEM: Windows 10 Pro x64

 

LAPTOP: Dell Precision M6500 -CPU: Intel Core i7 920xm (4c,8t@2.0ghz,turbo 3.2ghz) -RAM: 12gb DDR3 -GPU: ATi Firepro M7820 -STORAGE: 240gb ADATA Premier SP550 (OS, Programs), 500GB Seagate STL500LM000 SSHD (Games, Files) -DISPLAY: 1920x1200 17.3” -OPERATING SYSTEM: Windows 10 Pro x64

 

SECONDARY RIG: -CPU: 2x Intel Xeon x5450 (4c, 4t ea., 8c, 8t @3ghz total) -MOTHERBOARD: Corvalent BDPEX -RAM: 14GB ECC DDR2 (Mix Match of Brands) -GPU: Nvidia Quadro NVS 285 -CASE: No Case (Everything is mounted on the wall in my closet) -STORAGE: 160GB WD Caviar SE WD1600AAJS (OS, Programs, Files) -PSU: 450w BFG -DISPLAY: Samsung UN22D5000 (1920X1080) -COOLING: Dell Precision T5400 Heatsinks and some random fans -KEYBOARD: Logitech G105 -MOUSE: Logitech M215 Wireless Mouse -OPERATING SYSTEM: Windows 7 Professional x64

 

NAS: -CPU: Intel Pentium e2180 (2c, 2t@2ghz) -MOTHERBOARD: HP Compaq DC5800 OEM -RAM: 2GB DDR2 (Unsure of Brand) -CASE: No Case (Everything is mounted on the wall in my closet) -STORAGE: 500GB HGST (Backup) -PSU: HP Compaq DC5800 OEM (300w) -DISPLAY: Samsung UN22D5000 (1920X1080) -COOLING: Cooler Master Hyper 101a (Zip Tied) and some random fans -OPERATING SYSTEM: FreeNAS 9.10 (Running From USB Flash Drive)

 

FOLDING RIG: Dell Precision T5400 -CPU: 2x Intel Xeon X5450 (4c, 4t ea., 8c, 8t @3ghz total) -MOTHERBOARD: Dell Precision T5400 OEM -RAM: 32gb ECC DDR2 (Hynix) -GPU: Nvidia Quadro NVS 290 -CASE: Dell Precision T5400 OEM -STORAGE: 250gb WD 250ABYS (OS, Programs, Files) -PSU: Dell Precision T5400 OEM -DISPLAY: Dell 1707FP (1280x1024) -COOLING: Dell Precision T5400 OEM -OPERATING SYSTEM: Windows 10 Pro x64


PHONE: iPhone 7 32GB Matte Black (Sprint)

 

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Posted

This isn't for a gaming/enthusiast type board, it's a dual processor supermicro board, pretty sure i need both or bad things will start to happen to my nice xeons

Oh it's a server board. Yes you'll need that 2nd 8-pin plugged in. There's plenty of molex-to-EPS power adapters out there, and chances are you won't be overclocking those Xeons so you'll be fine using one of those. Preferably if you can find one that takes two molex and turns it into an 8-pin EPS.

"Rawr XD"

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