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Dual or Single molex > 6 pin

Cayde-7
By Cayde-7
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Go to solution Solved by LukeSavenije,
Just now, EPieter said:

Netherlands, as cheap as possible

system power 9 or cx 2017, should be around 40 euros

Posted

I've bought a GPU but it need a 8 pin, which I have and a 6 pin that I don't have. So, I was searching for molex > 6 pin converter. I found 2 different ones ( see attachments). which one should I use? Is there a difference between them.

 

Afbeeldingsresultaat voor molex > 6pin

Afbeeldingsresultaat voor molex > 6pin

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Posted

What GPU and what psu?

 

MSI B450 Pro Gaming Pro Carbon AC | AMD Ryzen 2700x  | NZXT  Kraken X52  | MSI GeForce RTX2070 Armour | Corsair Vengeance LPX 32GB (4*8) 3200MhZ | Samsung 970 evo M.2nvme 500GB Boot  / Samsung 860 evo 500GB SSD | Corsair RM550X (2018) | Fractal Design Meshify C white | Logitech G pro Wireless | Gigabyte Aurus AD27QD 

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Posted

The one with that converts two molexes to a single PCI-E is better for load balancing on older PSU-s that have multiple weak 12V rails.

 

But if your PSU still uses MOLEX and it doesn't have enough PCi-E power connections for the new card, you should replace it.

If it doesn't have two PCI-E power connectors, it probably doesn't have a 12V rail strong enough for a card that requires that much power.

 

Which PSU is it?

M.S.C.E. (M.Sc. Computer Engineering), IT specialist in a hospital, 30+ years of gaming, 20+ years of computer enthusiasm, Geek, Trekkie, anime fan

  • Main PC: AMD Ryzen 7 5800X3D - EK AIO 360 D-RGB - Arctic Cooling MX-4 - Asus Prime X570-P - 4x8GB DDR4 3200 HyperX Fury CL16 - Sapphire AMD Radeon 6950XT Nitro+ - 1TB Kingston Fury Renegade - 2TB Kingston Fury Renegade - 512GB ADATA SU800 - 960GB Kingston A400 - Seasonic PX-850 850W  - custom black ATX and EPS cables - Fractal Design Define R5 Blackout - Windows 11 x64 23H2 - 3 Arctic Cooling P14 PWM PST - 5 Arctic Cooling P12 PWM PST
  • Peripherals: LG 32GK650F - Dell P2319h - Logitech G Pro X Superlight with Tiger Ice - HyperX Alloy Origins Core (TKL) - EndGame Gear MPC890 - Genius HF 1250B - Akliam PD4 - Sennheiser HD 560s - Simgot EM6L - Truthear Zero - QKZ x HBB - 7Hz Salnotes Zero - Logitech C270 - Behringer PS400 - BM700  - Colormunki Smile - Speedlink Torid - Jysk Stenderup - LG 24x External DVD writer - Konig smart card reader
  • Laptop: Acer E5–575G-386R 15.6" 1080p (i3 6100U + 12GB DDR4 (4GB+8GB) + GeForce 940MX + 256GB nVME) Win 10 Pro x64 22H2 - Logitech G305 + AAA Lithium battery
  • Networking: Asus TUF Gaming AX6000 - Arcadyan ISP router - 35/5 Mbps vDSL
  • TV and gadgets: TCL 50EP680 50" 4K LED + Sharp HT-SB100 75W RMS soundbar - Samsung Galaxy Tab A8 10.1" - OnePlus 9 256GB - Olymous Cameda C-160 - GameBoy Color 
  • Streaming/Server/Storage PC: AMD Ryzen 5 3600 - LC-Power LC-CC-120 - MSI B450 Tomahawk Max - 2x4GB ADATA 2666 DDR4 - 120GB Kingston V300 - Toshiba DT01ACA100 1TB - Toshiba DT01ACA200 2TB - 2x WD Green 2TB - Sapphire Pulse AMD Radeon R9 380X - 550W EVGA G3 SuperNova - Chieftec Giga DF-01B - White Shark Spartan X keyboard - Roccat Kone Pure Military Desert strike - Logitech S-220 - Philips 226L
  • Livingroom PC (dad uses): AMD FX 8300 - Arctic Freezer 64 - Asus M5A97 R2.0 Evo - 2x4GB DDR3 1833 Kingston - MSI Radeon HD 7770 1GB OC - 120GB Adata SSD - 500W Fractal Design Essence - DVD-RW - Samsung SM 2253BW - Logitech G710+ - wireless vertical mouse - MS 2.0 speakers
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23 minutes ago, 191x7 said:

The one with that converts two molexes to a single PCI-E is better for load balancing on older PSU-s that have multiple weak 12V rails.

 

But if your PSU still uses MOLEX and it doesn't have enough PCi-E power connections for the new card, you should replace it.

If it doesn't have two PCI-E power connectors, it probably doesn't have a 12V rail strong enough for a card that requires that much power.

 

Which PSU is it?

That’s what I was aiming at too. Moles psu’s are outdated as hell ?

 

MSI B450 Pro Gaming Pro Carbon AC | AMD Ryzen 2700x  | NZXT  Kraken X52  | MSI GeForce RTX2070 Armour | Corsair Vengeance LPX 32GB (4*8) 3200MhZ | Samsung 970 evo M.2nvme 500GB Boot  / Samsung 860 evo 500GB SSD | Corsair RM550X (2018) | Fractal Design Meshify C white | Logitech G pro Wireless | Gigabyte Aurus AD27QD 

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Just now, Stormseeker9 said:

That’s what I was aiming at too. Moles psu’s are outdated as hell ?

i mean... most of the times, yeah

 

you have rare cases with servers, where many need special cables or don't even support pcie power

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The pci-e 6 pin connector is supposed to give up to 75 watts to a video card ( 12v x 6.25A = 75w)

 

According to the standards, a single molex connector is rated for up to 5a on each pin in the connector. So technically, the connector should not "transfer" more than 12v x 5A = 60 watts through it.

 

The reason for this limitation is safety... there is some resistance at the contact point between the molex pins when you plug them in something... so when there's a lot of current flowing between the male and female connectors, the pins in the connectors will start to warm up... if there's too high current and too much heat, the heat can be enough to melt the plastic of the molex connector and loosen the pins and cause short circuits or random disconnections.

 

So, the adapter with two molex connectors is better because that maximum amount of 75w is split between the two molex connectors, so each molex connector only has to transfer 75w / 2 = 37.5 watts.

Basically, it makes connectors heat less and you also have a bit of a redundancy : if you have a loose molex connector, there's the other one to take the burden.

 

Now, if you have a video card that barely needs a 6 pin molex connector, like let's say a card which consumes 70-90 watts ... such a card would consume around 50-60 watts from the pci-e slot, and only around 20-30 watts from the pci-e 6 pin connector. With such cards, you'd be relatively safe to use the more basic single molex to pci-e 6pin adapter, or use the 2 molex ->pci-e 6pin adapter with just one molex in use (most video cards would still work in that configuration)

But overall, it's safer and better to just use both molex connectors.

 

Also note in general it's better to use molex - pci-e 6pin instead of sata - pci-e 6pin ... sata is rated for lower current, 4.5A on 12v ... but the cheap sata connectors are usually so bad that I wouldn't trust them for more than around 2.5-3A per connector, or around 25-30 watts.

 

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2 minutes ago, mariushm said:

The pci-e 6 pin connector is supposed to give up to 75 watts to a video card ( 12v x 6.25A = 75w)

wait... 8 pin is 150w according to atx spec, isn't that a little low?

 

but yeah, totally right on molex, because that's mostly 5v, not 12v

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44 minutes ago, LukeSavenije said:

I'm here for that as well

it is a Sapphire Radeon RX 570 NITRO 

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Just now, LukeSavenije said:

we asked about the psu...

Be quiet! Pure Power L7 350W

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2 minutes ago, EPieter said:

Be quiet! Pure Power L7 350W

oh damn... i wouldn't put a 570 on that... spend money on a new one, not a converter

 

@191x7 i think you have the same thoughts?

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1 minute ago, LukeSavenije said:

oh damn... i wouldn't put a 570 on that... spend money on a new one, not a converter

 

@191x7 i think you have the same thoughts?

I do you think this is a good new PSU LOGILINK PA0089 700W

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1 minute ago, EPieter said:

I do you think this is a good new PSU LOGILINK PA0089 700W

nope, that's horrible

 

what is your country, budget and whole system?

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1 minute ago, LukeSavenije said:

nope, that's horrible

 

what is your country, budget and whole system?

Netherlands, as cheap as possible

Intel core 2 quad 9400

 

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Ok, I'm taking the system power 9,

 

Thanks

 

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Just now, EPieter said:

Ok, I'm taking the system power 9,

 

Thanks

 

no problem

 

good luck! you can mark it solved with that checkmark on the left, and we'd always appreciate some likes

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34 minutes ago, LukeSavenije said:

wait... 8 pin is 150w according to atx spec, isn't that a little low?

 

but yeah, totally right on molex, because that's mostly 5v, not 12v

Both pci-e 6 pin and pci-e 8 pin have 3 pairs of wires that carry energy (12v + ground, times 3).

The extra 2 wires in the pci-e 8 pin connector are there to basically signal the video card that the power supply is properly designed and the wires are thick enough that it can handle up to 150 watts through those 3 pairs of wires, instead of 75w.

 

So pci-e 6pin is 75w, pci-e 8pin is 150w ... but the number of wires that carry electricity is the same, 6 (3 x 12v and 3 x ground).

 

RX 570 will average around 150w when gaming, and will go up to 175w for brief moments.

From the pci-e slot, it will take around 60 watts, so around 100-125w will be taken from the pci-e 8pin connector.

For this reason it would be an absolute MUST to use both molex connectors, so that you have 12v x 2 pins x 5A per pin = ~ 120w maximum current.

Even so, I would consider powering a RX 570 using such an adapter RISKY... i would be constantly concerned about connectors overheating.

 

@EPieter your PSU is not powerful enough to handle this video card and the rest of the components.

The video card and the CPU are powered from the 12v output... the video card will take up to 175w and your 9400 cpu will consume up to let's say 60-80 watts, so you're at around 250 watts already. Then you have fans, mechanical drives and other things in your PC.

Your L7 350w can only output 300 watts on the 12v output, the rest is only on 3.3v and 5v, so the psu can't handle it.

 

It's not about wattage, don't look at shit power supplies like that Logisys 700w which lie about their capabilites, just look for something that can output 400-450w on 12v or more, which is pretty much any decent psu from a known brand with good reputation, that says it can do 550w or more. Even a 500w psu will do, provided it's from a reputable manufacturer.

 

 

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1 minute ago, mariushm said:

Even a 500w psu will do, provided it's from a reputable manufacturer

well... he got a system power 9 now... which is dc-dc and so much better

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52 minutes ago, LukeSavenije said:

oh damn... i wouldn't put a 570 on that... spend money on a new one, not a converter

 

@191x7 i think you have the same thoughts?

I agree with you completely, the 350W old unit - I wouldn't even put an RX 560 on that.

 

50 minutes ago, EPieter said:

I do you think this is a good new PSU LOGILINK PA0089 700W

It probably would work, but it's a low-quality unit so I wouldn't recommend.

 

The cheapest I would get is a mid-tier 500W (and up) unit. At least 80+ Bronze.

Made by Seasonic, SuperFlower, SAMA etc. 

 

 

48 minutes ago, EPieter said:

Netherlands, as cheap as possible

Intel core 2 quad 9400

 

Oh, that CPU is such a huge bottleneck to a modern low end card like the RX 570. I guess it won't outperform an RX 550 to RX 560 card.

 

44 minutes ago, EPieter said:

Ok, I'm taking the system power 9,

 

Thanks

 

Good choice. Just choose the wattage carefully. :)

M.S.C.E. (M.Sc. Computer Engineering), IT specialist in a hospital, 30+ years of gaming, 20+ years of computer enthusiasm, Geek, Trekkie, anime fan

  • Main PC: AMD Ryzen 7 5800X3D - EK AIO 360 D-RGB - Arctic Cooling MX-4 - Asus Prime X570-P - 4x8GB DDR4 3200 HyperX Fury CL16 - Sapphire AMD Radeon 6950XT Nitro+ - 1TB Kingston Fury Renegade - 2TB Kingston Fury Renegade - 512GB ADATA SU800 - 960GB Kingston A400 - Seasonic PX-850 850W  - custom black ATX and EPS cables - Fractal Design Define R5 Blackout - Windows 11 x64 23H2 - 3 Arctic Cooling P14 PWM PST - 5 Arctic Cooling P12 PWM PST
  • Peripherals: LG 32GK650F - Dell P2319h - Logitech G Pro X Superlight with Tiger Ice - HyperX Alloy Origins Core (TKL) - EndGame Gear MPC890 - Genius HF 1250B - Akliam PD4 - Sennheiser HD 560s - Simgot EM6L - Truthear Zero - QKZ x HBB - 7Hz Salnotes Zero - Logitech C270 - Behringer PS400 - BM700  - Colormunki Smile - Speedlink Torid - Jysk Stenderup - LG 24x External DVD writer - Konig smart card reader
  • Laptop: Acer E5–575G-386R 15.6" 1080p (i3 6100U + 12GB DDR4 (4GB+8GB) + GeForce 940MX + 256GB nVME) Win 10 Pro x64 22H2 - Logitech G305 + AAA Lithium battery
  • Networking: Asus TUF Gaming AX6000 - Arcadyan ISP router - 35/5 Mbps vDSL
  • TV and gadgets: TCL 50EP680 50" 4K LED + Sharp HT-SB100 75W RMS soundbar - Samsung Galaxy Tab A8 10.1" - OnePlus 9 256GB - Olymous Cameda C-160 - GameBoy Color 
  • Streaming/Server/Storage PC: AMD Ryzen 5 3600 - LC-Power LC-CC-120 - MSI B450 Tomahawk Max - 2x4GB ADATA 2666 DDR4 - 120GB Kingston V300 - Toshiba DT01ACA100 1TB - Toshiba DT01ACA200 2TB - 2x WD Green 2TB - Sapphire Pulse AMD Radeon R9 380X - 550W EVGA G3 SuperNova - Chieftec Giga DF-01B - White Shark Spartan X keyboard - Roccat Kone Pure Military Desert strike - Logitech S-220 - Philips 226L
  • Livingroom PC (dad uses): AMD FX 8300 - Arctic Freezer 64 - Asus M5A97 R2.0 Evo - 2x4GB DDR3 1833 Kingston - MSI Radeon HD 7770 1GB OC - 120GB Adata SSD - 500W Fractal Design Essence - DVD-RW - Samsung SM 2253BW - Logitech G710+ - wireless vertical mouse - MS 2.0 speakers
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Posted
1 hour ago, 191x7 said:

Made by Seasonic

i wouldn't buy a s12ii, s12iii or m12ii myself...

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35 minutes ago, LukeSavenije said:

i wouldn't buy a s12ii, s12iii or m12ii myself...

Because of the loud fans and the older platform, or?

M.S.C.E. (M.Sc. Computer Engineering), IT specialist in a hospital, 30+ years of gaming, 20+ years of computer enthusiasm, Geek, Trekkie, anime fan

  • Main PC: AMD Ryzen 7 5800X3D - EK AIO 360 D-RGB - Arctic Cooling MX-4 - Asus Prime X570-P - 4x8GB DDR4 3200 HyperX Fury CL16 - Sapphire AMD Radeon 6950XT Nitro+ - 1TB Kingston Fury Renegade - 2TB Kingston Fury Renegade - 512GB ADATA SU800 - 960GB Kingston A400 - Seasonic PX-850 850W  - custom black ATX and EPS cables - Fractal Design Define R5 Blackout - Windows 11 x64 23H2 - 3 Arctic Cooling P14 PWM PST - 5 Arctic Cooling P12 PWM PST
  • Peripherals: LG 32GK650F - Dell P2319h - Logitech G Pro X Superlight with Tiger Ice - HyperX Alloy Origins Core (TKL) - EndGame Gear MPC890 - Genius HF 1250B - Akliam PD4 - Sennheiser HD 560s - Simgot EM6L - Truthear Zero - QKZ x HBB - 7Hz Salnotes Zero - Logitech C270 - Behringer PS400 - BM700  - Colormunki Smile - Speedlink Torid - Jysk Stenderup - LG 24x External DVD writer - Konig smart card reader
  • Laptop: Acer E5–575G-386R 15.6" 1080p (i3 6100U + 12GB DDR4 (4GB+8GB) + GeForce 940MX + 256GB nVME) Win 10 Pro x64 22H2 - Logitech G305 + AAA Lithium battery
  • Networking: Asus TUF Gaming AX6000 - Arcadyan ISP router - 35/5 Mbps vDSL
  • TV and gadgets: TCL 50EP680 50" 4K LED + Sharp HT-SB100 75W RMS soundbar - Samsung Galaxy Tab A8 10.1" - OnePlus 9 256GB - Olymous Cameda C-160 - GameBoy Color 
  • Streaming/Server/Storage PC: AMD Ryzen 5 3600 - LC-Power LC-CC-120 - MSI B450 Tomahawk Max - 2x4GB ADATA 2666 DDR4 - 120GB Kingston V300 - Toshiba DT01ACA100 1TB - Toshiba DT01ACA200 2TB - 2x WD Green 2TB - Sapphire Pulse AMD Radeon R9 380X - 550W EVGA G3 SuperNova - Chieftec Giga DF-01B - White Shark Spartan X keyboard - Roccat Kone Pure Military Desert strike - Logitech S-220 - Philips 226L
  • Livingroom PC (dad uses): AMD FX 8300 - Arctic Freezer 64 - Asus M5A97 R2.0 Evo - 2x4GB DDR3 1833 Kingston - MSI Radeon HD 7770 1GB OC - 120GB Adata SSD - 500W Fractal Design Essence - DVD-RW - Samsung SM 2253BW - Logitech G710+ - wireless vertical mouse - MS 2.0 speakers
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23 minutes ago, 191x7 said:

Because of the loud fans and the older platform, or?

mainly because it's group regulated and has no uvp

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