Can anybody else report if this is the same little Delta 7000RPM fan that we all had blowing on our overclocked athlons 14 years ago? Looks like it to me. I've had one, and I remember the high pitched whine at full blast.

for those who havent RMA'd and wondering whether replacing the fan is an option I've posted my fix at /FindPost/2201208

Hi everyone,
 
I recently replaced the 40x28mm fan in the Hadron Air PSU.  I used:
- 1 scythe mini kaze 40x10mm (~4.8CFM)
- 1 scythe mini kaze 40x20mm (~5.1CFM)
I put the  20mm closer to the back of the computer
 
My system:
Gigabyte GA-z97n-wifi
4790k (No overclock)
2x 8gb 1600mhz ram
1x 2tb hdd, 2x 240gb ssds
msi gtx 970
 
At first it was an amazing mod.  The PSU was basically silent.  I was so happy. Then I plugged in my MSI GTX 970 (148 watts tdp) and began playing a game (Far Cry 4).  My temperatures were amazing... And then my fps dropped to 25-30 (from a solid 50 /w vertical sync).  This wasn't a case of a random demanding scene, my fps were not coming back...lol. I was confused, and I immediately suspected the PSU.  I put my hand behind the PSU, and my fears became true, the air was pretty damn hot... My gpu temps were excellent (like 65c).
 
I closed out of Far Cry 4, and I let my computer chill for 5 minutes on my desktop...still hot air.  I decided "Ah WTH, I'll try another game". I opened The Crew, and I got a blue screen... Remember this is just my experience, I'm interested if anyone else has successful had long gaming sessions with smaller fans in their psu.
 
Now I can't say I know 100% that the fan mod was the culprit, but I'm ~90% confident.  I think that my voltages dropped severely due to the heat issues.  I still haven't found an exact match for the original fan online.  I've found 2 extremely close model numbers, so my educated guess is the stock fan puts out between 15.8-24cfm, I'm leaning towards 15.8. Those fans operate at 45dBa and 51dBa, respectively.  This u1 sized PSU (the stock hadron) has a super inefficient fan... I mean a normal psu has a what, 70-120mm fan?
 
The best alternative I can find is a Sunon GM1204PQV1-8A.  It "supposedly" moves 17cfm and operates at 36.5dBA. It's coming in the mail. I'm going to clean and oil it before I install it.  I now think EVGA wouldn't put in a loud ass fan that moves 15.8CFM, if it wasn't required to keep the psu cool. Maybe you can get away with 12cfm, but buying 2 noctua fans that move 4cfm and taping them together most likely won't support a strong graphics card.  I am currently using my computer with the 2 small fans and just my integrated gpu. Both my PSU, and the air behind it, are ice cold.  This makes sense to me because my last EVGA 80 plus gold PSU (Supernova) turned the fan off until it was needed.
 
My recommendations if you want to do something about the noise, is open the fan and drop some singers sewing oil in (google how to do this).  Or buy a different fan (what I did).  I personally don't believe stacking fans yields much benefit when you are exhausting hot air out of the case.  I think they are more effective at cooling intake air as it travels through the tunnel.  I'm going to be honest I didn't read the whole forum before I typed this, so sorry if this is repetitive, but I think my experiences could be useful for someone.
 
EDIT- I also want to add that I bought an infrared thermometer gun, so I can get some idea of the temperature of the air coming out of the psu (there's no program or sensor to see this).  I should hopefully have some good info in a few days.

Sounds like a solid recommendation. Have you replaced the fan yet? If so, how are the results? 

series6
Just buy a few replacements. EVGA used the cheapest crappiest fan they could find. They are loud as the quality is poor. Plenty on ebay, alibaba or through various electronics retailers. 
 
Its a pity as it ruined an otherwise good case. At the price they retail the Hadron for its unforgivable and profit mongering. I am onto my 3rd fan. There are many many better fans - see the rang at rs-online for better bearing style fans. Silent and push more air.
 
As I live in Australia I am not about to send the PSU to Taiwan directly (which is their return policy) - thats some poor service there.
 
I asked if I could buy spare fans from them and was advised no.
 
Try     Digikey dot com     they have the FFB0412VHN fans 
Otherwise lots of alternatives at     rs-online dot com
 
Search for a fan around:

Specs:

 

Dimensions: 40mm x 40mm x 28mm

 

Bearing: Ball

 

RPM: 9,500 RPM

 

Airflow: 15.79 CFM

 

Noise Level: 45 dBA

 

Power Connector: 3 Pin

 

Rated Voltage: 12 VDC

Operating Voltage: 4.5 - 13.8 V

Input Current:  0.16 Amp (0.24 Amp max)

 

Input Power:  1.92 W

Max Air Pressure:   12.94 mmH20

Features: RPM Sensor

Edit - I had links to heaps more but the forums deleted them
 
I went same brand replacements but this looks good
 
s-online /web/p/axial-fans/4924354/
DC Axial Fan, 40 x 40 x 28mm, 28.3m/h, 3.72W, 12 V dc (CeraDyna Series)
Air Flow 28.3m³/h
Bearing Type CeraDyna C
Depth 28mm
Dimensions 40 x 40 x 28mm
Fan Speed 9000rpm
Height 40mm
Maximum Current 310mA
Noise Level 41dB
Power Consumption 3.72W
Series CeraDyna
Supply Voltage 12 V dc
Width 40mm

Have you considered adding a 40mm fan to the front grill of the PSU? I would imagine that if you configure it as intake, it will help bring in cool air into the PSU and lighten the load for the exhaust fan. 

Mine was intolerable, which frankly is a problem with all 40mm fans that spin at high speed. I wanted to replace the stock fan but wasn't comfortable with the reduced airflow so I replaced the stock fans with 2 fans in a push-pull arrangement. One pulling into the PSU and zip-tied to the front of the PSU and the other replacing the stock fan. I used the Evercool 40mm fan EC4007M12CA. They're $6 a pop. The Noctua is 20.

I honestly don't know. I haven't taken the time to measure temps or airflow. I kind of just decided that it will have to be good enough, and if the PSU dies before I'm ready to give up this case I can always replace it if it doesn't take out a motherboard along with it.

buddahfunk
Or should I just resign to the fact that im gonna eat the cost of the case and the slimline dvd drive and find new mini case?

That's been the consensus so far. The amount of noise the PSU outputs bothers people differently. Some hate it, some don't mind it, some just drown it out with well placed speakers or headphones. The latter IMO being an unacceptable alternative. I've read and seen video reports of people using machine oil to lube the fan (voiding warranty), or just simply sending it to EVGA to get a replacement with claims that it fixed their issue and that the PSU is quieter now. Then again, quiet to one person, may be too loud for the next.
 
Only surefire way to fix the issue is to either mod the Hadron to make room for a SFX PSU like some others have done or do like you said, eat the cost of case + slimdrive and checkout different cases that perhaps use ATX of SFX PSUs that are quieter.  had a great list of mitx and matx cases for 2015, I especially like the the Ncase M1, and the Inwin H-Frame Mini if only it could fit a full size gpu. lol
 
Personally, I've gotten used to the PSU noise. I stopped playing a particular game that was causing my Hadron to sound like a jet taking off in my office (World of Warcraft on ultra settings at 1440p) and really only play GTA5 at mid-high settings at 1440p and my system is surprisingly quieter than it was before.
 
 

Yup, felt the exact same way. 
I think I'm still in the denial phase because I love the look of the case.
 

 
 

im certain that the the problem is having a non-blower graphic card.  having the power supply that close to the graphics card is bad design imo.  having a graphic card with a rear exhaust blower should be an absolute necessity for this case.  now i am faced with the situation of either buying a new card or a new case and power supply.