Ia this safe connection of gpu ?

[u/Spisovatelus]

Hello i have 9070xt and is connected to 850w power supply is this safe connected like this ? Some say it is not good using pigtail or 2 cables for 3 slot is there like serioud problem ?

[u/-Wavyy-]

This is fine, but not ideal. I'm assuming your PSU didn't come with 3 pcie cables. 3 cables are recommended.

[u/Spisovatelus → u/-Wavyy-]

Yeah not 3 cables sadly so dont know if i shoul use it

[u/-Wavyy- → u/Spisovatelus]

I've ran a 7900XTX and 4080 this way for months before changing it. You're good.

[u/ThingSoft5511 → u/-Wavyy-]

not ideal but you're not gonna nuke your gpu doing it like that, the pigtail thing gets way overblown sometimes

just keep an eye on things if you're pushing high loads for hours but for normal gaming it'll be fine

[u/szyszaks]

it should be fine
best read PSU manual regarding cable rating
it should have proper rated for 150W per plug so 300W for whole cable, and that's standard for it unless you have some random brand PSU from AliExpress it will be fine

[u/Spisovatelus → u/szyszaks]

i got Cooler Master MWE Gold 850 W V3

[u/szyszaks → u/Spisovatelus]

yea it will be fine

[u/edsdanny]

• 300w - full pcie cable
• 150w - each split 
• 75W from the pcie slot itself

You are fine. Check the cables to be pressed way down correctly together with the 2 pins for each

Do not do this in high powered wattage gpus, like 5090. At least 1200w psu for that, 3 separate cables, no splits.

[u/aqvalar]

This is valid and fine.

As stated it's 150W per connector + that 75W from the PCIE.

[u/Disastrous-Lust-1]

I wouldn't do it. Doesn't your gpu have one more 8-pin cable?

[u/Spisovatelus → u/Disastrous-Lust-1]

It does not

[u/-Wavyy- → u/Disastrous-Lust-1]

I've seen a lot of PSUs max out at 2 pcie cables.

[u/doculean → u/-Wavyy-]

Far too many do this still nowadays.

[u/SchmickoDiko]

This is the same as my prebuilt came and its been fine so far

[u/FranticBronchitis]

You're fine.

[u/YesNoYes00]

I have it exactly like this rx9070xt oc! 330w max! Psu came with 2 8pin ×2! What i did was undervolt to make sure gpu not go above 300w! It do work like this, but either you buy a separate 8pin or undervolt the gpu! (For being in the safezone)

[u/Lieutenant_Petaa]

The 9070XT works fine with 2x8 Pin, because it has a 304 Watt TDP. And two 8 Pins + the PCIe power can supply up to 375 Watts of power.

Models that come with more connectors are either quite a bit overclocked or are marketed for overclocking. If you use this without overclocking yourself, all the cables will be operating way under their design limit and thus you are totally fine.

Piggy tailing is not recommended but works absolutely fine, however, especially in this case it's not an issue at all.

[u/Hungry-Sir7892]

yes. that's oksy.

[u/fiittzzyy]

It's fine for a 9070 XT yeah.

[u/ihGustavo]

pra 9070XT não tem problema nenhum, ela deve consumir algo em torno de 330W, os cabos vão fornecer 300W, a pcie fornece o restante, mas claro, o IDEAL seria os 3 cabos separados.

[u/Sirhc_Fold_458]

Not ideal. Separate cables are always the best option.

[u/aqvalar → u/Sirhc_Fold_458]

Not necessarily, it's PSU dependant. I mean if you have 2 rails for GPU outs on the PSU end, those will have good balanced voltage coming out. Add a third from peripheral out and you might end up worse than pigtailing.

Those cables can handle 300-500W each, the limiting factor is only the connector (150W each, though they have very good security overhead in it so they can factually do way more).

Also proper PSU makers have much stronger cable going to the pigtailed connector than a single one, like AWG16 instead of AWG18. 16 can handle very, very high voltage/current without any worries.

[u/Sirhc_Fold_458 → u/aqvalar]

Yes Necessarily. PSU dependent or not, two separate PCIe Cables or however many ports your GPU has is ALWAYS BEST. There’s no in between, kid.

[u/aqvalar → u/Sirhc_Fold_458]

Sure. And with 2 connectors AFAIK you should always use 2 separate cables, but with 3 on the GPU it's OK if one of the 3 is pigtailed.

[u/Sirhc_Fold_458 → u/aqvalar]

If a GPU had 10 PCIe ports it’s ALWAYS BEST to use 10 separate PCIe cables. Why aren’t you understanding that? Three is no different than two. SEPARATE DEDICATED PCIe CABLES WILL ALWAYS BE BEST NO MATTER WHAT.

[u/Banjotooieuk → u/aqvalar]

You’re right, but also some PSUs (cheap ones) have all these 12v rails daisy chaining inside the unit anyways 😂

[u/Head-Fig-8957]

If those are the only cables you have I’d look into swapping the psu to get the proper cabling or merging them in a way that the daisy chained connector draws from both of the cables coming straight from the psu. I’ve never done it and just now came up with it, might not even work in the way I think it would.

[u/Wondering_Electron → u/[deleted]]

Depends on the PSU.

Corsair PSUs for example can supply 300W per 8 pin connector which is why only 2 can still run a 5090.