Help! Plz!

[Bryan99]

So I currently have this 450watt psu 

 

Corsair CP-9020120-UK CX Series... https://www.amazon.co.uk/dp/B06WW51XBX?ref=ppx_pop_mob_ap_share

 

i recently bought a new gpu the RX 5700 XT Red Devil and when I plug in my current psu the

 

6+2 connection is all I have to fill one of the two 8pin connections and when I turn on the pc nothing comes up on screen, I’m told I need a new psu that has two 8 pin connectors and that my 450watt was barely enough anyway to begin with.

 

Anyone know what psu I should get?

how do I know if the new one will have 2 8 pin connections?

And what wattage to go for?

 

my pc:

Ryzen 5 3600

Msi B450M Pro-VHD Max motherboard

Corsair vengeance rgb pro 16GB

[Old graphics card]-Msi Radeon RX 5500 XT Mech 8GB

[New GPU] Radeon RX 5700 XT Red Devil 8GB

NOT USING BOTH CARDS AT SAME TIME

Samsung 970 EVO Plus 500GB

 

[Dujith]

450W should work, your system looks like it would use 300-350 at max.

Anyway, that doesnt matter as the GPU does require both 8 pins to be connected. Wasnt there a cable included so you could use SATA power or something?

[Haro]

Wattage wise it's enough, it's just the cx only has one 8 pin pcie cable and the red devil 5700xt needs 2 8 pin pcie cables..

10 hours ago, Bryan99 said:

Anyone know what psu I should get?

wattage?

[ObsidianAura]

Assuming nothing else is plugged in, you should be OK. While not optimal or efficient to use the 450 psu, it should at least boot. Something else is up is my guess. Got a friend who you can take the card to and test with?

 

Also i have to ask, you've not done something silly like plug the video out into the motherboard have you?

[Kilrah]

13 minutes ago, ObsidianAura said:

Assuming nothing else is plugged in, you should be OK. While not optimal or efficient to use the 450 psu, it should at least boot.

It will not boot without the 2 8-pin cables.

[ObsidianAura]

7 minutes ago, Kilrah said:

It will not boot without the 2 8-pin cables.

Ah I'd incorrectly assumed that the OP had used 1 8 pin and 1 6+2 pin. 

 

If you've got a whole 8 pin connector unfilled you're going nowhere.

[ObsidianAura]

I fitted a Corsair RM550x PSU yesterday and that has the right number of PCI-E connectors for you and its modular so is nice to fit. 

 

I'd recommend that.

[dfsgsfa]

just boot shall not be a issue, somthing else is wrong.

booting dont need that full power

[Kilrah]

Most GPUs will not power up / display anything if they don't have all their connectors fitted. 

Some will just display a message that you need to connect all of them and halt boot.

 

It's not that power is insufficient, it's that the GPU checks what's connected and refuses to work if it's incorrect.

[tkitch]

need something like this for the second one:

https://smile.amazon.com/CGTime-15-Pin-PCI-Express-Female-Adapter/dp/B075383P7T/ref=sr_1_1_sspa?dchild=1&keywords=sata+to+8+pin&qid=1599829171&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFYSk9YM0pBNEkyODkmZW5jcnlwdGVkSWQ9QTA1NDk0ODE5V1U5WkFFTVg1R0YmZW5jcnlwdGVkQWRJZD1BMDc1MTI2NTJERUpGTE9TWjZDUzQmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl