Question about graphic card

[Dzombaa]

Hello everyone,

I really need help with my new graphic card, so if somebody can help, thanks a lot...

I recently bought a new AMD RX 580 8GB graphic card to replace my old GT 740 2GB graphic card. But unfortunately I have only one TKG cable (6 pins, picture attached) and I need two... Is there any way for me to solve this problem without buying new power supply unit ? Can I just take two 4 pins cable(picture attached, white ones) and with some "mini adapter" or something ?

 

Thank you

[Moonzy]

4 minutes ago, Dzombaa said:

 

 

people are gonna tell you to replace this

 

and if your PSU doesnt come with the right cable, it's not the right PSU

[dfsgsfa]

which rx580, some only need 1x 8pin to run leaving 1 empty

[Dzombaa]

4 minutes ago, dfsgsfa said:

which rx580, some only need 1x 8pin to run leaving 1 empty

 

[mahyar]

you can use molex or sata to pci power not that i recommend it if you can change psu if not  use adaptor

[dfsgsfa]

Quote

Requirements

External Power - 8-pins 1

Minimum Power Supply Requirement 500 watt

XFX Recommended Power Supply XFX 550W 

https://www.xfxforce.com/gpus/amd-radeon-tm-rx-580-gts-xxx-edition-8gb-4

 

looks like 1 x 8pin  is enough, if thats correct model

[mariushm]

Your power supply is not good enough to work with a RX 580, see the picture below :

 

You have 16A of current on 12v ... that's  12v x 16A = 192 watts

 

The video card alone needs up to around 210-220 watts from 12v ( RX 570 cards consume up to 175w)

The processor in your computer also takes power from 12v, and it probably consumes around 40-80 watts.

The fans in your computer use power from 12v ... around 2-3 watts each

Mechanical drives consume power from 12v, another 6-10 watts per drive.

 

So if you actually manage to connect the video card to that power supply, most likely the power supply will blow up when you start a game, or a few seconds inside a game, when the video card actually starts to consume a lot of power.

In Windows or when watching a movie or stuff on Youtube the video card will only consume around 10-30 watts which is less than what your GT 740 consumes, so you'll be able to start the pc with this video card and even install drivers and watch a movie and read the forums, but as soon as you're gonna start a game the psu will probably die.

 

You need a power supply that can provide at least 350-400 watts on the 12v output... 400 watts / 12v = 33A ... so you want a power supply that has at least around 32A on the 12v on the label (but if the power supply has multiple rails, pay attention to the total ... for example a power supply could have 12v1 rail with 18A and 12v2 rail with 20A, but those are peak limits and you can't add them up ... the label should say the total and could be for example 30...36A in total, and not 18+20=38A)

 

The power supply you have actually lies, it's not actually a 550w power supply.

It says it can do 28A on 3.3v (28a x 3.3v = 92 watts) and 34A on 5v (34A x 5v = 170 watts) but both are lies. I'd bet the limits are more like 20-25A on either voltage. Also, pay attention to the note that says 5v and 3.3v added together are not allowed to exceed 260 watts ... which is most likely a lie as well, in reality the limit is most likely somewhere around 140 watts for the total. 

It doesn't matter anyway, because 3.3v and 5v are used very little in modern computers so it's pointless.

You should only care about the 12v capabilities, which are very low, less than 200 watts.... and you have to ask yourself if they lie about 5v and 3.3v and the total power, are they lying about the 12v as well? Could be less than 192 watts on 12v.

 

If they were honest, they'd sell this power supply as a 300 watts power supply at best, with 200w on 12v and 100w for 3.3v and 5v.