Question can a 750watt psu power my two rtx 3070ti?

I'm only going to power my 2gpu and 2riser. with this. All other components is connected to different psu.
Hello ueharajohji. In that case, then it depends. Personally I wouldn't connect that cheap power supply to my GPUs. If you're using them to render or export projects, and plan on keeping your GPUs long term, then I would suggest a higher quality unit. However, if you're using the GPUs to mine crypto currency, then you'll probably want to compare the cost to a higher quality PSU, and see if the numbers are still profitable enough for you, with the added cost of a high quality unit. If not then take your chances with the power supply that you've already selected.

Corsair RM850x -2018-850W PC Power Supply Unit [80PLUS GOLD] PS795 CP-9020180-JP
¥11,936 + shipping
https://www.amazon.co.jp/-/en/Corsair-RM850x-2018-850W-Supply-CP-9020180-JP/dp/B07D2KNCXD
 
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Oct 21, 2021
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Hello ueharajohji. In that case, then it depends. Personally I wouldn't connect that cheap power supply to my GPUs. If you're using them to render or export projects, and plan on keep your GPUs long term, then I would suggest a higher quality unit. However, if you're using the GPUs to mine crypto currency, then you'll probably want to compare the cost to a higher quality PSU, and see if the numbers are still profitable enough for you, with the added cost of a high quality unit. If not then take your chances with the power supply that you've already selected.

Corsair RM850x -2018-850W PC Power Supply Unit [80PLUS GOLD] PS795 CP-9020180-JP
¥11,936 + shipping
https://www.amazon.co.jp/-/en/Corsair-RM850x-2018-850W-Supply-CP-9020180-JP/dp/B07D2KNCXD
thanks for the concern. You guys are right I need a better psu. I will buy the psu in the link you provided.
 
Oct 21, 2021
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Not recommanded. Molex has one 12v wire while a riser needs 3. With molex you pull 3 times the current through one wire.
if I am going to buy the corsair 850x do I power my two riser with one pcie (using splitters) ? I can only see two 4 + 4 cables which is enough for only two 3070tis.
 
Oct 21, 2021
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yes it is for mining and I am going to dedicate the 850watt psu for two rtx 3070, I am going to undervolt my gpus slightly but I assume even at 290watts each the 850 watt can handle it..if I am wrong please enlighten me.
 

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Commendable
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but I assume even at 290watts each the 850 watt can handle it
It's about the cables. With 290w I prefer 2 seperate cables to each GPU.
RM850x has 5 sockets for CPU and GPU and they're all the same. Since you don't use a CPU with this PSU you're able to connect 2 more PCI-e cables. Just order 2 extra Corsair type 4 PCI-e cables so you have 5 of them. One to the risers and two seperate cables to each GPU.
 
Oct 21, 2021
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It's about the cables. With 290w I prefer 2 seperate cables to each GPU.
RM850x has 5 sockets for CPU and GPU and they're all the same. Since you don't use a CPU with this PSU you're able to connect 2 more PCI-e cables. Just order 2 extra Corsair type 4 PCI-e cables so you have 5 of them. One to the risers and two seperate cables to each GPU.
sorry for the late reply.
Is it okay to buy a cable that says "for corsair rm858x" but from a different maker?
 

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