i understand the cpu power consumption, but are both the 8 pin and the 4 pin supplied with power, or is the 8 pin the only one with power ??

All pins are supplied with power. It can be used as a 4 pin, 8 pin, or 8+4 pin CPU power connector on a motherboard.

I don’t get how this would work, the original cable still only sends out the same amount of power. Wouldn’t it be better to run 2 separate cpu cables?

There is enough juice to feed the extra connector from the power supply. You really only need this cable if you overclock. Some power supplies have the extra connector already on the harness. In any event, this connector works well.

Is this compatible with the gamemax 1050w psu?

It looks like your power supply has two CPU eight pin connectors (modular). Yes it will work. It works on all eight pin CPU connectors. It is used to power the extra four pin socket on the MB so the CPU don't starve for power if you are overclocking.

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EPS12V CPU 8 Pin Female to CPU ATX 8 Pin and ATX 4 Pin Male Power Supply Extension Cable

Product ID: 320533558

Details

Brand
JZYMOD
Color
Black
Connector Gender
Male
Plug Format
Type A
Voltage
12 volts

⚡Supports 12V, 13A, 120W power delivery

🔌18AWG heavy-duty wire gauge

🖥️Compatible with all ATX/SFX/fanless PSUs

3169 kr

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your next-gen build with confidence and style!

ROBUST 18 AWG WIRING - Thick, durable wiring ensures stable power delivery and longevity under heavy loads—built to last your next build and beyond.
PLUG PLAY CONFIDENCE - 10.6-inch length with clear manual, backed by a 12-month warranty and responsive customer service—no more guesswork or downtime.
SEAMLESS PSU COMPATIBILITY - Works flawlessly with all major power supply units including ATX, SFX, and fanless models for ultimate flexibility.
UNIVERSAL MOTHERBOARD SUPPORT - Perfectly fits motherboards with 8-pin +12V, 4-pin +12V, or combined 8+4 pin CPU power sockets—future-proof your rig.
NEAT AIRFLOW OPTIMIZED DESIGN - Fully black, flat, and flexible cable design keeps your build clean and maximizes airflow for cooler, quieter performance.

The JZYMOD EPS12V CPU 8 Pin Female to CPU ATX 8 Pin and ATX 4 Pin Male Power Supply Extension Cable is a premium 10.6-inch extension cable featuring thick 18AWG wiring for reliable 12V, 13A, 120W power delivery. Designed for compatibility with all ATX, SFX, and fanless PSUs and motherboards with 8-pin and 4-pin CPU power connectors, it ensures neat cable management and improved airflow with its flexible flat black design. Backed by a 12-month warranty and excellent customer support, it’s the essential upgrade for professional-grade PC builds and seamless power supply integration.

Specifications

ASIN	B093Q3HZCM
Best Sellers Rank	#286 in Computer Power Supplies
Brand	JZYMOD
Color	Black
Connector Gender	Male
Customer Reviews	4.6 4.6 out of 5 stars (492)
Ethernet Cable Category	Cat 1
Gauge	18
Input Current	13 A
Item Length	10.6 inches
Manufacturer	JZYMOD Tech
Model Number	600310701309
Number of Items	1
Number of Packs	1
Plug Type	Type A
Power Cord Prong Count	12
UPC	600310701309
Unit Count	1 Count
Voltage	12 volts
Wattage	120 watts

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