Corsair SF Series 750 W

crmaris · May 24, 2019

With 750 Watts, the Corsair SF750 is the strongest SFX power supply money can buy today. We saw great performance in almost all tests, and it operates quietly. Thanks to the included SFX-to-ATX adapter, you'll be able to pair it with a standard sized system, too.

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GreiverBlade · May 24, 2019

wow... 179.99$ msrp ... ok i can plan on 230chf/$ retail then ... damn that's quite expensive ...

but again that's a 750W SFX ... (although i suspect other brand would do it cheaper than Corsair ... maybe not 80+ Platinum but even Bronze would be good ... :laugh:

)

nice review

londiste · May 24, 2019

With SFX PSU at this wattage Platinum is well worth it. There really is no room left in there and however little the improvement in waste heat, it is awesome. It does not help that these PSUs usually end up in extremely small and cramped cases.

92% vs 94% efficiency at 50% load does not sound much but looking at an example real-life scenario of 600W PSU putting out 300W the remaining 8% and 6% (that almost completely get converted to heat) are 24W and 18W in practice. I am not talking about cost of electricity, but the effort of cooling down additional 6W in that small a space with small fan does make a difference in noise and heat buildup. This is theoretical so numbers will vary a bit in practice but this is the gist of the best case scenario here.

There are very few competitors for high-power SFX PSUs. Silverstone is the main one and has been making SFX PSUs (cooler ones mostly in SFX-L form factor) for a while but their quality and QA seems to be spotty to put it lightly. I might be unlucky but I have only had bad experience with Silverstone SFX PSUs, one was DOA, one had a known issue with fan control, one was loud as hell.

Corsair is not the best either, they just happen to have the best products and lineup in the segment right now. For example, they have SF600 in both 80+ Gold an 80+ Platinum. You need to delve into the product code to see which one you are getting. The most practical difference is gold one having somewhat crappier fan control. I have an older SF600 feeding my PC right now.

This much power in SFX form factor, especially with this high quality is an amazing technical achievement. Pictures in reviews do not usually show how bloody small an SFX PSU really is. The best photo Google gave me right now was this - with beer for scale:

atomicus · May 24, 2019

I have the SF600 Platinum and it's brilliant. I'm running a fairly beefy ITX system with a 2700X and 2080Ti, never had a single problem (nor would I have any reason to). An ITX build would struggle to overload even the 600W, so it's hard to actually imagine someone needing 750W for ITX purposes. When it comes to M-ATX/ATX though, I can see the advantages if you want to save some space in a smaller case.

phanbuey · May 24, 2019

This is my PSU - I love it...

If you do get it and plan to use it with the adapter in a standard ATX, you will need to get the corsair custom cables or extenders, as the 24 pin and the 8 pin CPU will not reach out of the box:

jabbadap · May 24, 2019

Yeah, that's a great one. Only way to best it is 80plus Titanium badge, come on CWT make it real.

crmaris · May 24, 2019

ETA-A+ I would say. 80 Plus only takes 3-4 measurements...

londiste · May 24, 2019

crmaris said:
ETA-A+ I would say. 80 Plus only takes 3-4 measurements...

SF750 is apparently ETA-A: https://www.cybenetics.com/code/pdf.php?id=OLY

crmaris · May 25, 2019

Yes I say that they should make an ETA-A+ next, which is tougher than Ti

jabbadap · May 25, 2019

crmaris said:
Yes I say that they should make an ETA-A+ next, which is tougher than Ti

Not that they are necessary ruling each other out. I don't think there's even single one 230V psu that can do ETA-A+ without being titanium efficiency. Heck if Titanum psu fails ETA-A+ tests it's usually because of "poor" power factor rather than any efficiency deficit. On 115V side of things I would personally take 80plus titanium ETA-A over the 80plus platinum ETA-A+, but then again I'm not living in the country where is such a voltage. So if I want ETA-A+ psu, only ones that I can buy are few 80plus titanium certified ones from Corsair or Seasonic.

junglist724 · May 26, 2019

I had an sf600 platinum in my Cerberus X with a 2700x + 1080 ti and unfortunately it was louder than my radiator fans at full load. The sf750 isn't any better in the noise department so when I switched to a 9900k+2080ti I had to go with a full ATX psu and had to move my watercooling loop outside the case.

Vlada011 · May 26, 2019

Right Power Supply for Lian Li PC-O10 WX.
This PSU mean difference between mid range and high end PC.

I believe 750W with in worse scenario could work with 250W power consumption and Intel Skylake-X or AMD Threadripper 1/2 platform.
But I would feel far from comfortable.

System Name	main/SFFHTPCARGH!(tm)/Xiaomi Mi TV Stick/Samsung Galaxy S23/Ally
Processor	Ryzen 7 5800X3D/i7-3770/S905X/Snapdragon 8 Gen 2/Ryzen Z1 Extreme
Motherboard	MSI MAG B550 Tomahawk/HP SFF Q77 Express/uh?/uh?/Asus
Cooling	Enermax ETS-T50 Axe aRGB /basic HP HSF /errr.../oh! liqui..wait, no:sizable vapor chamber/a nice one
Memory	64gb DDR4 3600/8gb DDR3 1600/2gbLPDDR3/8gbLPDDR5x/16gb(10 sys)LPDDR5 6400
Video Card(s)	Hellhound Spectral White RX 7900 XTX 24gb/GT 730/Mali 450MP5/Adreno 740/Radeon 780M 6gb LPDDR5
Storage	250gb870EVO/500gb860EVO/2tbSandisk/NVMe2tb+1tb/4tbextreme V2/1TB Arion/500gb/8gb/256gb/4tb SN850X
Display(s)	X58222 32" 2880x1620/32"FHDTV/273E3LHSB 27" 1920x1080/6.67"/AMOLED 2X panel FHD+120hz/7" FHD 120hz
Case	Cougar Panzer Max/Elite 8300 SFF/None/Gorilla Glass Victus 2/front-stock back-JSAUX RGB transparent
Audio Device(s)	Logi Z333/SB Audigy RX/HDMI/HDMI/Dolby Atmos/KZ x HBB PR2/Moondrop Chu II + TRN BT20S
Power Supply	Chieftec Proton BDF-1000C /HP 240w/12v 1.5A/USAMS GAN PD 33w/USAMS GAN 100w
Mouse	Speedlink Sovos Vertical-Asus ROG Spatha-Logi Ergo M575/Xiaomi XMRM-006/touch/touch
Keyboard	Endorfy Thock 75%/Lofree Edge/none/touch/virtual
VR HMD	Medion Erazer
Software	Win10 64/Win8.1 64/Android TV 8.1/Android 14/Win11 64
Benchmark Scores	bench...mark? i do leave mark on bench sometime, to remember which one is the most comfortable. :o

Processor	Ryzen 7800X3D
Motherboard	ROG STRIX B650E-F GAMING WIFI
Memory	2x16GB G.Skill Flare X5 DDR5-6000 CL36 (F5-6000J3636F16GX2-FX5)
Video Card(s)	INNO3D GeForce RTX™ 4070 Ti SUPER TWIN X2
Storage	2TB Samsung 980 PRO, 4TB WD Black SN850X
Display(s)	42" LG C2 OLED, 27" ASUS PG279Q
Case	Thermaltake Core P5
Power Supply	Fractal Design Ion+ Platinum 760W
Mouse	Corsair Dark Core RGB Pro SE
Keyboard	Corsair K100 RGB
VR HMD	HTC Vive Cosmos

System Name	stress-less
Processor	9800X3D @ 5.42GHZ
Motherboard	MSI PRO B650M-A Wifi
Cooling	Thermalright Phantom Spirit EVO
Memory	64GB DDR5 6400 1:1 CL30-36-36-76 FCLK 2200
Video Card(s)	RTX 4090 FE
Storage	2TB WD SN850, 4TB WD SN850X
Display(s)	Alienware 32" 4k 240hz OLED
Case	Jonsbo Z20
Audio Device(s)	Yes
Power Supply	Corsair SF750
Mouse	DeathadderV2 X Hyperspeed
Keyboard	65% HE Keyboard
Software	Windows 11
Benchmark Scores	They're pretty good, nothing crazy.

Processor	Ryzen 7800X3D
Motherboard	ROG STRIX B650E-F GAMING WIFI
Memory	2x16GB G.Skill Flare X5 DDR5-6000 CL36 (F5-6000J3636F16GX2-FX5)
Video Card(s)	INNO3D GeForce RTX™ 4070 Ti SUPER TWIN X2
Storage	2TB Samsung 980 PRO, 4TB WD Black SN850X
Display(s)	42" LG C2 OLED, 27" ASUS PG279Q
Case	Thermaltake Core P5
Power Supply	Fractal Design Ion+ Platinum 760W
Mouse	Corsair Dark Core RGB Pro SE
Keyboard	Corsair K100 RGB
VR HMD	HTC Vive Cosmos

System Name	Multiple desktop/server builds
Processor	Desktops: 13900K, 5800X3D, 12900K \| Servers: 2 x 3900X, 2 x 5950X, 3950X, 2950X, 8700K
Motherboard	Z690 Apex, X570 Aorus Xtreme, Z690-I Strix
Cooling	All watercooled
Memory	DDR5-6400C32, DDR4-3600C14, DDR5-6000C36
Video Card(s)	4090 Gaming OC, 4090 TUF OC, 2 x 3090, 2 x 2080Ti, 1080Ti Gaming X EK, 2 x 1070, 2 x 1060
Storage	dozens of TBs of SSDs, 112TB NAS, 140TB NAS
Display(s)	Odyssey Neo G9, PG35VQ, P75QX-H1
Case	Caselabs S8, Enthoo Elite, Meshlicious, Cerberus X, Cerberus, 2 x Velka 7, MM U2-UFO, Define C
Audio Device(s)	Schiit Modius + SMSL SP200, Grace DAC + Drop THX AAA, Sony HT-A9, Nakamichi 9.2.4
Power Supply	AX1200, Dark Power Pro 12 1500W
Mouse	G Pro X Superlight Black + White
Keyboard	Wooting 60HE, Moonlander
VR HMD	Index, Oculus CV1

System Name	Intel® X99 Wellsburg
Processor	Intel® Core™ i7-5820K - 4.5GHz
Motherboard	ASUS Rampage V E10 (1801)
Cooling	EK RGB Monoblock + EK XRES D5 Revo Glass PWM
Memory	CMD16GX4M4A2666C15
Video Card(s)	ASUS GTX1080Ti Poseidon
Storage	Samsung 970 EVO PLUS 1TB /850 EVO 1TB / WD Black 2TB
Display(s)	Samsung P2450H
Case	Lian Li PC-O11 WXC
Audio Device(s)	CREATIVE Sound Blaster ZxR
Power Supply	EVGA 1200 P2 Platinum
Mouse	Logitech G900 / SS QCK
Keyboard	Deck 87 Francium Pro
Software	Windows 10 Pro x64