Epilogue
Like the 1000W model, the FSP VITA GM 850W has high build quality, except for the terrible Yate Loon fan, which I would change ASAP with a Hong Hua one. The registered overall performance is high enough to meet many competing offerings eye-to-eye, with only Super Flower Leadex VII XG being far away from the rest of the pack. This platform can achieve a notably higher overall performance score with more tuning. If someone at FSP reads this review (I will send them the link), he/she should pay attention to the following:
- Load regulation should be tighter on the minor rails.
- The average power factor readings are dead low. The APFC converter needs tuning!
- Vampire power is high at 230V. It shouldn’t exceed 0.1W
- [Not so Important because it is close to 3.2V] The 3.3V rail drops below 3.2V (3.19V) in the high-load transient tests. It has to remain at or above 3.2V in all cases, as in the “normal” transient load tests.
Compared to the 1000W model, the 850W performed notably better, which is expected since the lower the max power, the less stress the platform has. FSP’s engineers also did a fine job in the protection features, including overcurrent protection on all rails and conservatively set overpower protection triggering points. If fan failure protection were implemented, it would be ideal! However, only a few manufacturers have started providing this crucial protection feature, and in high-end, thus expensive, platforms.
Overall, depending on the street price, the VITA GM 850 will be a good choice for a capable gaming system. But FSP should replace its fan with a higher-quality one, especially since it supports this product with an extended warranty.
Before investing in a new power supply, read my Best ATX v3.x PSUs article to check all alternative PSU offerings. You help me a lot by using my affiliate links, which don’t increase the product’s price. I get a commission from Amazon every time you do it, which can make a difference for me, especially now that I am on my own, working exclusively for my media and not for someone else.
- Delivered full power at 46°C
- Quiet operation
- ATX v3.1 and PCIe 5.1 ready
- Efficient platform
- Correctly set protection features
- Good transient response (normal loads)
- 12V rail keeps its voltage high in the ATX v3.1 transient load tests
- Within 1% load regulation at 12V
- Good ripple suppression
- Long enough hold-up time
- Low inrush currents
- Efficient 5VSB rail
- Alternative Low Power Mode (ALPM) compatible
- Good build quality (except for the fan)
- Fully modular
- Enough cables and connectors, including a high-power one (12+4 pin, 600W)
- Long enough distance (150-155mm) between the SATA and half of the 4-pin Molex connectors
- MSRP is a bit on the high side
- APFC converter needs tuning for higher PF readings
- Loose load regulation on the minor rails
- Below 70% (69.55%) efficiency with a 2% load
- Lower than 16ms power ok signal’s hold-up time
Hi, between FSP Vita 850w and XPG Core Reactor II 850W which one would you recommend?
The XPG is about $15 – $17 cheaper here
They have similar overall performance so I would get the one that is more affordable.
What about compared to Superflower Leadex vii Gold? It’s also about $17 – $20 more than XPG
Leadex is very good.
It’s now sold out everywhere in my region, alternative would be NZXT C850 for 230v? NZXT is $10 more than the XPG or the XPG might still be better choice?
I just got this PSU and am experiencing quite a bit of coil whine. Is this something you’ve had while performing your testing?
Thinking of either replacing my set or just living with it.
Nope if there are any coil whine issues, I mention them in the review. You should probably replace it.