Power Supply Review / Teardown | 700W Modular FLEX Power Supply from TaoBao 7760B (MF-700F)
- Thread starter REVOCCASES
- Start date
The side view reveals an SRC/LLC+SR Controller which is another indicator that it really has 90+ efficiency.
these photos are accurate.
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Great review, and one that made me feel alright enough to purchase it.
Been using it a couple of days to power at 4650G and 3060, so totally overkill in terms of wattage.
So far not much issues, but the fan at full tilt is seriously noisy. Initially, there was very bad coil whine, butr seems to go away after a while, thankfully.
Been using it a couple of days to power at 4650G and 3060, so totally overkill in terms of wattage.
So far not much issues, but the fan at full tilt is seriously noisy. Initially, there was very bad coil whine, butr seems to go away after a while, thankfully.
I'd say that is a good match. When it comes to FLEX PSUs I definitely prefer to use one with "overkill wattage" and then replace the noisy stock fan with a Noctua to get a more quiet setup while not having to worry about the PSU dying from overheating
Looking into a Noctua fan swap, for sure.I'd say that is a good match. When it comes to FLEX PSUs I definitely prefer to use one with "overkill wattage" and then replace the noisy stock fan with a Noctua to get a more quiet setup while not having to worry about the PSU dying from overheating
Definitely 'overkill wattage' is the way to I went for, for some peace of mind. So far, I can report that the fan doesn't go full tilt often or at all actually, after that initial start in the first few days. Or maybe my noise tolerance is really high, as my standing fan next to me can drown out a lot of things.
if you're looking for a 6.0 litre case, with NFC SkySlots, to go with it, this video has what you need :
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if you're looking for a 6.0 litre case, with NFC SkySlots, to go with it, this video has what you need :
and here's a photo of the finished version (buyer chooses screw type) :
Interesting! It's like a Flex PSU Dr Zaber Sentry?
Although I would prefer a vertical sandwich case for my use case, and very happy with my K39 right now too.
I have the Z-case P50 case along with a Enhance 7660B PSU from SFFTEC powering a underpowered 5800x at 65W and a RTX 3090 (at 90% power) on a custom liquid cooled loop with 8 fans.
Obviously not ideal, but is stable to run triple AAA titles at 4K at decent FPS. I am looking for a PSU upgrade and Flex options are quite limited. Based on the build quality I am somewhat concerned. Of course anyone can put labels on, and until there is a full PSU test and review, I am hesitant to try this PSU out on my build. It is an intriguing option.
Obviously not ideal, but is stable to run triple AAA titles at 4K at decent FPS. I am looking for a PSU upgrade and Flex options are quite limited. Based on the build quality I am somewhat concerned. Of course anyone can put labels on, and until there is a full PSU test and review, I am hesitant to try this PSU out on my build. It is an intriguing option.
it is fully tested, but if you need video evidence of a different power unit, Josh | NFC tested a modular FSP unit, in the above video.
let me know if you want an AliExpress weblink, for this modular FSP unit.
if you already got an Enhance 7660B there is no reason to change that because IMHO this is the best quality high power FLEX PSU available right now. I only got the MF-700F because the Enhance is difficult to get and bloody expensive here where I live.
The FSP Flexguru is only rated 500W and 80+ Gold so that also wouldn't be an upgrade over the Enhance 7660B
Josh | NFC believes that the 7660B is noisy at 500W, while the FSP FlexGuru w/ noctua fan, is semi-silent at 500W.
but his test might be faulty.
Well, that's a strange statement, if he's comparing a Noctua-modded FSP with a stock Enhance. With a Noctua fan swap you can make any FLEX PSU more silent. But like I said before, I wouldn't feel comfortable doing that if you are going to run it at/near rated output loads - there is a reason why manufacturers are using high RPM fans in those PSUs.
As a rule of thumb I generally don't run my FLEX PSUs over 65% rated load with a Noctua fan swap in order to keep noise and temps acceptable.
Excellent work!. Very informative for a Powerfull 700W Flex PSU, as an alternative to the famous ENHANCE 7660B although it's chinese.I did a few more tests with a 4020 / 5000RPM fan today. It's not a Noctua but has similar airflow characteristics.
I also have to correct my original post: the fan is temperature controlled. Here is my "guestimate" how the fan curve looks like:
I'm not sure where / how they measure the temperature but IMO the most important area is near the caps as they are the most heat-senitive part inside your PSU. As hotter the caps get, the sooner they will fail (see example below). So I placed a temperature probe in this area.
1st test: 30 minutes 300W load / 4020, 5000RPM fan / Exhaust (standard orientation)
2nd test: 30 minutes 300W load / 4020, 5000RPM fan / Intake
Interesting results. With the fan in standard orientation (exhaust) the internals of the PSU seem to get much hotter. So why is the fan on most FLEX PSUs exhaust? Honestly, I have no idea. I work a lot with industrial power supplies and most of them have the fan set as intake, pushing fresh air inside the PSU. For FLEX maybe they do it because of dust, fan turbulence (noise) or to prevent additional hot air is pushed in your PC... Anyways, guess they have a reason to do so.
Given that they make these, I wonder if it's posstible to have the PCB extend out from the side, thus giving more space to the connector (should be enough for MOBO+EPS+2 PCIe)
I'm also wondering has anyone try to attach 2 80mm fan on the top to imporve noise and thermal
something like This
I'm also wondering has anyone try to attach 2 80mm fan on the top to imporve noise and thermal
something like This
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Big thanks for the update! I'm looking for a flex psu to reduce the height of my build.
Is the 7760B the 700W? Can't find it on Overtek's website, they only offer the 600W
Sorry, that was a typo. Overtek offers the Enhance 7660B which is a 600W PSU - meaning it can deliver 600W cont. on the 12V rail.
To be fair, I haven't load tested if the "Extreme Cat 7760B" from TaoBao can really deliver 700W cont. I'm using it only up to 450W in order to keep it reasonably cool with the Noctua fan mod and that is working fine so far.
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Thanks, @REVOCCASES. Thought a 700W flex PSU with an official noctua mod will be quieter than the 600W. Now my portable PC draws max 270W at the plug during TimeSpy so 7660B should be plenty even if I upgrade my GPU at some point.
Big thanks for the detailed analysis! Just waiting for a Gelid Slim Silence AM4 - if it's as good as reviews say, that cooler and the 7660B + noctua mod will be a great combo for 65W CPU SFF builds
Big thanks for the detailed analysis! Just waiting for a Gelid Slim Silence AM4 - if it's as good as reviews say, that cooler and the 7660B + noctua mod will be a great combo for 65W CPU SFF builds
Just an idea - but if noise is important to you and you're fine with modding, you could use a dedicated fan speed controller to make a "0-RPM FLEX PSU" for your build.
For example something like this:
Could set it so that the fan would kick in and ramp up when the PSU is reaching 55 - 60C under load.
