The ENP-8345L is Enhance Electronics first native modular Flex-ATX power supply. The model featured below is customised for Overtek. It features a 450W rating, short silicone cables for better management in ultra small form factor systems, platinum efficiency and 3 year warranty.
SPECIFICATIONS
| MODEL | ENP-8345L-OVT |
| MANUFACTURER (OEM) | Enhance Electronics |
| FORM FACTOR | Flex-ATX |
| CERTIFICATION | 80+ Platinum |
| DIMENSIONS | 165×81.5×40.5mm (L×W×D) |
| WATTAGE | 450W |
| OPERATING TEMPERATURE | 0°C~40°C |
| SAFETY | – Overload Protection – Over Voltage Protection – Short Circuit Protection |
| FAN SPECIFICATIONS | 40x20mm (Yate Loon D40BM-12C) |
| CONNECTORS | – 1x 20+4PIN ATX (180mm) – 1x 12VHPWR to 4+4pin EPS + 6+2pin PCIe (250mm) – 2x SATA (100 + 60mm) – 2x Molex (250 + 100mm) |
REVIEW
In terms of noise, the ENP-8345L remains quiet below 270W, but will get progressively louder thereafter. This Flex-ATX power supply is best suited for low power systems, such as R5 7600 or R7 7800X3D paired with RTX 4060/Ti or similar GPU. We’ve included idle noise sample below to illustrate fan motor noise:
We are currently exploring suitable alternative fans for ENP-8345L in order to improve fan motor noise and overall sound profile. Such as those from SUNON MF40201VX-1000U-A99 and Delta AUB0412VD-00.
Before people get the idea of swapping in a quiet Noctua 40mm fan, there are some caveats to be aware of. The 40x20mm 5V Noctua fan will technically work upto a certain wattage, if PSU temperature is kept in check. Like if your Flex-ATX PSU isn’t being cooked by some other heat source, such as GPU flow through cooler exhaust heat. In theory, it could work upto 315W, based on 5V NF-A4x20 max speed. The lower wattage you’re running at, the better in this instance. Unfortunately, 5V fans have reduced lifespan running at 12V. Something around 1 month of 24/7 usage or 730h give or take. Please do not exceed 70% of max wattage or 315W as the Noctua fan isn’t capable of cooling the PSU adequately beyond this point and may cause overheating or damage.
Internal view of the Enhance ENP-8345L PCB design. The top section of the shell can be removed by unscrewing a single screw on both left and right side of the power supply.
We measured roughly 240W total system power consumption using the 7800X3D (optimised), and RTX 4060 under a combined synthetic load. 75W on CPU + 115W on GPU + system power usage. Gaming load was lower, at roughly 215W, but not drastically different. This doesn’t leave much headroom for using a more powerful graphics card, while also remaining within our target 270~300W. The 4070 would put powerdraw firmly in 300~315W range where the ENP-8345L fan will start to get on the louder. In our experience, the ENP-8345L is not well equipped to handle 4070/S system configuration, if you wish to keep PSU fan noise in check. This shouldn’t be an issue for likes of the 160W RTX 4060 Ti, however.
We also tested the ENP-8345L on our Intel system running ASUS B760-I motherboard and 13900K and experienced system shut downs when placing CPU under load. This isn’t related to the powerdraw as the shutdown would occur under both high and low wattage workloads. This appears to be compatibility issue with either 13900K or ASUS B760-I motherboard, as we had no issues with any of our AMD systems. Unfortunately, we had no other Intel CPUs or motherboards to test with. We are awaiting feedback from other testers to better determine the cause.
SUMMARY / CONCLUSIONS
The included Yate Loon fan generates an unpleasant motor feedback. It also appears your milage may vary with Yate Loon D40BM-12C. The one we received in our SilverStone FX600 was best 40mm fan we’ve used and the one in ENP-8345L is poor by comparison. The motor feedback noise can be improved with fan swap to suitable alternate fan, such as SUNON MF40201VX-1000U-A99:
While there is still motor feedback noise present, it’s certainly an improvement over the included Yate Loon D40BM-12C in our sample. We also tested the SUNON 40mm MagLev fan at 315W.
Unfortunately, high frequency motor noise is very typical of these high speed 40mm fans. Those from ADDA also exhibit similar behaviour. In order to keep fan noise in check, the PSU will need to be remain below 300W output. The ENP-8345L-OVT includes short silicone cables which should make cable management easier in small Mini-ITX cases. 270W target, 300W peak power draw doesn’t leave much of room to maneuver in terms of hardware selection if you care about system noise. Some performance concessions through power limiting may need to be made for certain hardware configurations, but this isn’t uncommon within the SFFPC community, when working within strict power budget. If you don’t care about noise at all, the ENP-8345L can easily deliver 400W.