6 to 8 pin Conversion Safe?

[Teemo4Life]

I have a SeaSonic M12 SS-700HM 700W

and unfortunately it only includes 1x8pin for the GPU which requires 2 8 pins.

Is it safe to buy a 6 to 8 pin converter?

[emosun]

that power supply is 13 years old , buy a new one

[dfsdfgfkjsefoiqzemnd]

It's perfectly safe ... as long as you're not inside the house when it burns down. 

 

Using a 6-pin to 8-pin converter is never really a good idea, and especially not on an old PSU. 

[Teemo4Life]

Just now, emosun said:

that power supply is 13 years old , buy a new one

ooo Black Lagoon. And no...it works, why would I unnecessarily upgrade.

[Jurrunio]

If the wiring's any good... tho most arent built well.

[Jurrunio]

2 minutes ago, Teemo4Life said:

And no...it works, why would I unnecessarily upgrade.

Because PSUs degrade over time. Just like running on bald tyres because they haven't burst yet.

[emosun]

See this is the biggest problem when people find these super old high wattage power supplies and just think that they are the same thing as a new power supply.

 

that thing has 3 12v rails all low amperage made to run directx9 / windows xp era machines and wasn't even rated at the time , becuase the rating system didn't exist.

 

[Teemo4Life]

9 minutes ago, Jurrunio said:

Because PSUs degrade over time. Just like running on bald tyres because they haven't burst yet.

MTBF

100,000 hours at 25°C under full load

 

Not even under full load so around 15 years. I've only used it for around 3-4 years. 

 

I have a new 1660 ti which I was going to sell and use the used 980 but requires 2x8 pin. and a 6 to 8pin adapter cost like $17

[Teemo4Life]

11 minutes ago, emosun said:

See this is the biggest problem when people find these super old high wattage power supplies and just think that they are the same thing as a new power supply.

 

that thing has 3 12v rails all low low amperage made to run directx9 era machines and wasn't even rated at the time , becuase the rating system didn't exist.

 

I got 4 12v rails. 56A max

[emosun]

well nobody here is going to recommend you run a 13 year old unrated power supply. 

if you want to just stuff a bunch of adapters on it then you can do it all by yourself

 

1 minute ago, Teemo4Life said:

I got 4 12v rails

oh im sorry , the image i was looking for the label was very low res due to the internet not being quite as good in 2006.

[emosun]

6 minutes ago, Teemo4Life said:

56A max

you... don't combine rail amperage because you don't combine rails.....

you will have 18a only because the gpu will have it's own rail.... I'm not sure why I'm even entertaining this idea someone else can take over if they want.

[Teemo4Life]

2 minutes ago, emosun said:

you... don't combine rail amperage because you don't combine rails.....

you will have 18a only because the gpu will have it's own rail.... I'm not sure why I'm even entertaining this idea someone else can take over if they want.

Combining them would be 72A max. I'm just reading off the sticker provided. 

[Jurrunio]

5 minutes ago, Teemo4Life said:

I got 4 12v rails

There's only 2 on a hardware level, no idea why Seasonic state 4 rails. There's no overcurrent protection either so nothing to stop it from blowing up when things go south on any one of the 12V rails. Overtemperature protection can sometimes trip before that but really unreliable as that takes time, and I dont see evidence that this unit has that either.

https://www.jonnyguru.com/blog/2006/10/07/seasonic-m12-700w-power-supply/4/

 

3 minutes ago, Teemo4Life said:

Combining them would be 72A max. I'm just reading off the sticker provided. 

you can only ever power a GPU with 1 rail at a time. Slight voltage variations in different rails can cause current to just pour into the rail with less voltage.

[emosun]

Just now, Teemo4Life said:

Combining them would be 72A max. I'm just reading off the sticker provided. 

Yeah.... you don't combine rails....

 

You literally cannot combine rails of different voltages anyway , as for combining 12v rails you also don't do that as each connector type will have it's own dedicated rail (back in those days to make higher wattage power supplies they would just add a bunch of rail to a pcb instead of make one single high amperage rail)

so the 6 pin plug that powers the gpu had only 18 amps on that powersupply , and with the power supply being 13 years old and only 80% efficient it most likely makes under 500w so you'd quite literally be better off with a new budget tier power supply than this one.

[pizapower]

8 minutes ago, Jurrunio said:

you can only ever power a GPU with 1 rail at a time. Slight voltage variations in different rails can cause current to just pour into the rail with less voltage.

Not true at all. Some GPUs need 3x 8pin

[emosun]

13 minutes ago, pizapower said:

Not true at all. Some GPUs need 3x 8pin

Yeah on a modern power supply with a single rail all three 8 pins use just one rail. 

[Jurrunio]

24 minutes ago, pizapower said:

Not true at all. Some GPUs need 3x 8pin

Still, each card should only be powered by one rail. You can have multiple connectors on a rail, but only 1 rail for a card.

[pizapower]

What PSUs have 3x 8pin on a single rail? I've only seen 2x 8pin max.

[dfsdfgfkjsefoiqzemnd]

1 hour ago, pizapower said:

What PSUs have 3x 8pin on a single rail? I've only seen 2x 8pin max.

IIRC some of the BeQuiet Dark Power Pro models have a switch which allows you to combine all 12V rails into a single one.  That way you can have more than two 8-pin cables from the "same" rail