You should to replace the PSU with one that is suitable. Choose molex connector kits in 2, 3, 4, 6, 9, 12,15 pins. SATA power connectors has a total of 15 pins of which 9 are power pins (3 x 3.3V, 3 x 5V, 3 x 12V). Molex Connectors, 2-15 circuits are in-stock at Parts Express. Molex has 2 power pins (one 5V and on 12V pin), each can deliver 11Amps for a total of 22Amps. We recommend using these 20-24 AGW Micro-Fit 3.0 female crimp pins to insert your wire into the plug properly. The 1.57 mm pin can carry 5 A of current, while the 2.36 mm. One of our most popular top-pin Molex connector pin-and-socket connectors is this Micro-Fit 3.0, 2 position 3mm plug-type connector. The 1050ti only uses 75W and depending on the card might not have a PCIe connector and will draw its power through the PCIe slot from the motherboard. Technically Molex can carry much more power than the SATA power connector. There are three typical pin sizes: 1.57 mm (0.062 in), 2.13 mm (0.084 in), and 2.36 mm (0.093 in). The R7 260X will use around 120W by itself. The CPU and GPU will both use the 12V rail, which according to the label on that power supply it can only output a maximum of 16A on the 12V rail, which is only 192W. 'P4-450W' is the model number of the power supply, not the wattage it is rated to output. 3.

The additional grounds lower the total CONNECTOR resistance and allow more power transfer, but in reality a 8-pin does not have twice the capacity of a 6-pin (which the 150 watt vs. It doesn't have a 6 pin PCIe power connector because it's really not supposed to run graphics cards. The 8-pin PCIe connector has 2 additional ground (neutral) pins vs the 6-pin.

That power supply must be around 20 years old. 5V was removed from the ATX specification in the early 2000s. You'll burn out the 4 pin molex cable by drawing too much current through it. The 6 pin PCIe connector uses 3x 12V wires to deliver the power, while the 4pin peripheral connector only has a single 12V wire. 4pin Molex peripheral connectors to 6pin PCIe connectors are a bad idea.

Molex 6 pin connector