Using pci-e to 8 pin cpu adapter

[Gabriel Arellano]

Hi everyone, I'm from Venezuela and i buyed a few weeks ago a new motherboard, a AM3 asrock 770 extreme. My psu is a 550w thermaltake TR-2X and worked great with all the upgrades i've installed, but the mobo i found doesn't have the standard 4 pin ATX connector, instead it have a 8 pin atx socket, and as you may know, here is really hard to buy good pc components due to the incredibly high price, so i buyed this cheap PCIe to 4+4 atx adapter.

 

The first problem started with this really crappy and cheap adapter buyed in the same store (2 molex to 8 pin atx), and testing the mobo with a Phenom ii x2 560 black edition with the unlocked cores, suddenly the pc freezed and the cable started melting and the cooper turned completly black. I repaired the mess with some cables of an old dell psu, and is working fine again even better than before.

 

The second problem is that the new adapter is connected to the same rail of the graphics card, and is pulling 106 watts, at the same time the same rail have to power the cpu, at full tdp.

 

My question is: is possible that this melting problem repeats on the new cable? to bare eye is noticeable the diference of the cable but i'm not sure about how the watt consumption of the cpu affects in the overheating of the cable; the cpu takes 145 watts at full TDP. The 12v volt rail of the psu of the GPU and CPU at the same time?

 

Heres the specs of my system:

Mobo: Asrock 770 extreme 3

CPU: Amd Phenom ii x2 560 Black Edition (unlocked in bios)

GPU: Evga geforce 550ti 

RAM: Corsair XMS3 2gb 1333mhz

Psu: Thermaltake TR-2X 550w

 

I leave the photo of the adapter down here

[minibois]

According to the manual you should have 1 8 pin/4+4 pin EPS connector (which goes typically to the top left of your motherboard) and 2 6+2 pin/8 pin PCIE connectors (for a videocard).

What cables are you missing and why are you not using the cables that come with the PSU?

[Gabriel Arellano]

5 minutes ago, minibois said:

According to the manual you should have 1 8 pin/4+4 pin EPS connector (which goes typically to the top left of your motherboard) and 2 6+2 pin/8 pin PCIE connectors (for a videocard).

What cables are you missing and why are you not using the cables that come with the PSU?

The PSU dont have this connectors, and as i mentioned before, the professional power supplies are so ridiculously expensive 

 

[Jurrunio]

You can check the thickness of the wires for how much current they can hold. On the wires there should be an AWG rating, relating to wire thickness.

 

I'm sure this is no professional PSU, not after ripping out the marketing terms.