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Recommend SFX Power Supply Unit [UK]

post #1 of 6
Thread Starter 
As title says, I've been looking for reliable SFX or small factor PSU's and need some suggestions. I've come across the Be Quiet BN133 SFX 300W PSU but couldn't find any reviews on it. Anyone has any idea of the OEM of that particular PSU and it's quality?

Thanks

Edit:

Also the Be Quiet SFX BN134 350W.
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post #2 of 6
I´ve never used them so I cant comment on their quality, but it looks like FSP is the OEM,

The 2 sfx are about 3/4 down.

http://www.realhardtechx.com/index_archivos/Page1354.htm
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post #3 of 6
I know the SilverStone SFX gold is good only flaw that one has is a loud fan
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post #4 of 6
Thread Starter 
Unfortunately with being on a budget, the SFX gold is out of the question.
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post #5 of 6
Quote:
Originally Posted by munaim1 View Post

Unfortunately with being on a budget, the SFX gold is out of the question.

Fair enough but the SilverStone SFX Bronze is not worth buying if you looked at that one

The Be Quiet SFX looks alright
Warning: Spoiler! (Click to show)
Conclusion

Being the first SFX PSU reviewed on Overclock3D thus far, it does make it slightly difficult to draw a conclusion on its performance in relation to any alternatives on the market. However, as much as I told myself not to compare the be quiet! SFX Power to the likes of an ATX PSU, it has become increasingly obvious throughout the testing that the unit is easily capable of competing with some of its full-sized counterparts.

Take for example the efficiency. At anything between 200-300w load the unit managed a highly respectable 85%. This only dropped down to 83% at other load levels, and even when run well above specification at an impressive 420w in Test 7, still managed to keep its chin up at 82.84%. This will play an important part in keeping energy bills to a minimum, especially when HTPC's and SFF Home/NAS servers tend to be left on 24/7.

Moving on to the voltage stability there's very little to be concerned about here either. The +3.3v and +5v rails may not have been quite as stable as some of the 350W full-sized ATX PSU's I've tested in the past, but with voltages ending up at 3.31v and 4.92v at full load, you really cant complain. The +12v rail was a bit of an odd ball, starting at 11.92v and actually increasing to 11.96v as a larger load was applied. This would tend to indicate that the voltage regulation on the PSU is overcompensating for the load and potentially reducing the maximum power output of the PSU at the top-end. However, with the unit managing to hold a 420w load in the testing this certainly wont pose any problem to those looking to get a full 350w out of the unit.

The only area that the be quiet! SFX Power failed to deliver (which is a bit ironic given its name) was in the noise output. At anything up to around 75% load the unit was perfectly silent. However on pushing closer to the PSU's maximum output, the 80mm fan speed increased significantly bringing with it the annoying pitched squeal that only 80mm fans are capable of. By 100% load the fan could easily be heard above the din of the PSU testing equipment which leads me to believe you wouldn't want your HTPC / SFF PC to be in the same room as you when this PSU is running flat out.


The Good
- Efficient operation for such a small unit
- Reasonable voltage stability in the 'normal' tests T1-T4.
- Sleeved Cables and Black finish make it good looking for an SFX unit.
- Ripple was surprisingly good.
- 420w max output!

The Mediocre
- Didn't like the cross-load tests.

The Bad
- Noisy approaching full load.

Although the be quiet! SFX Power is far from perfect, being able to fit such a stable and efficient PSU into a Small Form Factor casing is worthy of award. For this reason the be quiet receives our recommended award.
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CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
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Seravee
(24 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming Gigabyte GTX 970 G1 Gaming Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
Hard DriveOptical DriveCoolingCooling
WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
AudioAudioOtherOther
Onkyo TX NR646  Harman Kardon HKTS 60 CableMod E series PSU cable set CableMod LED Strips 
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Reply
post #6 of 6
Thread Starter 
Quote:
Originally Posted by shilka View Post

Quote:
Originally Posted by munaim1 View Post

Unfortunately with being on a budget, the SFX gold is out of the question.

Fair enough but the SilverStone SFX Bronze is not worth buying if you looked at that one

The Be Quiet SFX looks alright
Warning: Spoiler! (Click to show)
Conclusion

Being the first SFX PSU reviewed on Overclock3D thus far, it does make it slightly difficult to draw a conclusion on its performance in relation to any alternatives on the market. However, as much as I told myself not to compare the be quiet! SFX Power to the likes of an ATX PSU, it has become increasingly obvious throughout the testing that the unit is easily capable of competing with some of its full-sized counterparts.

Take for example the efficiency. At anything between 200-300w load the unit managed a highly respectable 85%. This only dropped down to 83% at other load levels, and even when run well above specification at an impressive 420w in Test 7, still managed to keep its chin up at 82.84%. This will play an important part in keeping energy bills to a minimum, especially when HTPC's and SFF Home/NAS servers tend to be left on 24/7.

Moving on to the voltage stability there's very little to be concerned about here either. The +3.3v and +5v rails may not have been quite as stable as some of the 350W full-sized ATX PSU's I've tested in the past, but with voltages ending up at 3.31v and 4.92v at full load, you really cant complain. The +12v rail was a bit of an odd ball, starting at 11.92v and actually increasing to 11.96v as a larger load was applied. This would tend to indicate that the voltage regulation on the PSU is overcompensating for the load and potentially reducing the maximum power output of the PSU at the top-end. However, with the unit managing to hold a 420w load in the testing this certainly wont pose any problem to those looking to get a full 350w out of the unit.

The only area that the be quiet! SFX Power failed to deliver (which is a bit ironic given its name) was in the noise output. At anything up to around 75% load the unit was perfectly silent. However on pushing closer to the PSU's maximum output, the 80mm fan speed increased significantly bringing with it the annoying pitched squeal that only 80mm fans are capable of. By 100% load the fan could easily be heard above the din of the PSU testing equipment which leads me to believe you wouldn't want your HTPC / SFF PC to be in the same room as you when this PSU is running flat out.


The Good
- Efficient operation for such a small unit
- Reasonable voltage stability in the 'normal' tests T1-T4.
- Sleeved Cables and Black finish make it good looking for an SFX unit.
- Ripple was surprisingly good.
- 420w max output!

The Mediocre
- Didn't like the cross-load tests.

The Bad
- Noisy approaching full load.

Although the be quiet! SFX Power is far from perfect, being able to fit such a stable and efficient PSU into a Small Form Factor casing is worthy of award. For this reason the be quiet receives our recommended award.

Was only looking at the Be Quiet range and thanks for the review info. Hopefully the internals of the 350w is the same on the 300w.

Thanks everyone!!
it looks alive
(17 items)
 
Sandy Transformed
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CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
  hide details  
Reply
it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
  hide details  
Reply
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