SilverStone's compact power supply comes with a revised, safer 16-pin power connector for Nvidia GPUs — SFX-L unit with Platinum certification delivering 1,200W of power

SilverStone SFX-L Extreme 1200R Platinum 1200w PSU
(Image credit: SilverStone)

SilverStone introduces a new SFX-L power supply capable of continuously supplying 1,200W - the Extreme 1200R Platinum. The power supply has enough juice to power the most power-hungry, such as the GeForce RTX 4090, one of the best graphics cards on the market.

The Extreme 1200R Platinum is SilverStone's highest-rated SFX-L power supply, rated for Cybenetics Platinum. To summarize, Cybenetics' Platinum indicates the power supply is between 89% and 91% efficient. This compact PSU promises to supply 1,200W continuous output rated for 24/7 use with 50 degrees Celcius operating temperature and provides 100A through 12V rail. The SFX-L Extreme 1200R Platinum uses Japanese capacitors and all the protection expected from a high-grade power supply.

It complies with the SFX12V 4.1 standard and PCIe CEM 5 specification. SilverStone also includes the 12V-2x6 power connector by default, giving a more reliable connection than the 12VHPWR standard, hence avoiding burnout. This SFX-L power supply has a 120mm silent fan with fluid dynamic bearing.

As expected, such power supplies have all the connectors a user would ever need. The following is the complete specification:

Swipe to scroll horizontally
Product NoSST-EX1200R-PL
Model (safety certification) SST-SL1200MCPT-A
Color Black (lead-free paint)
Max. DC Output 1200W
Power density 969W/L
Combined +3.3V & +5V 100W
Combined +12V 1200W
Input Voltage 90 ~ 264 Vrms
Input Frequency Range 47Hz ~ 63Hz
PFC Active PFC (PF>0.9 at full load)
Efficiency89% ~ 91% overall efficiency
MTBF 100,000 hours
ProtectionOver Current Protection/ Over Power Protection/ Over Voltage Protection/ Short Circuit Protection/ Over Temperature Protection
Connectors1 x 24 / 20-Pin motherboard connector
Row 13 - Cell 0 2 x 8 / 4-Pin EPS / ATX 12V connectors
Row 14 - Cell 0 4 x 8 / 6-Pin PCIe connectors
Row 15 - Cell 0 1 x 12+4-Pin 12V-2x6 connector
Row 16 - Cell 0 8 x SATA connectors
Row 17 - Cell 0 3 x 4-Pin Peripheral connector
Row 18 - Cell 0 1 x 4-Pin Floppy connector
Cooling System Silent 120mm FDB fan
Form factor SFX-L
Noise Level 0 ~ 36 dBA
Dimension 125mm (W) x 63.5mm (H) x 130mm (D)
Weight 1.39 kg
Certification Cybenetics Platinum

The Extreme 1200R Platinum has a five-year warranty. No pricing or launch date is mentioned, though it will likely be available just in time for the RTX 40 Super series graphics cards. It's not a moment too soon, as some have already started shifting to newer ATX standards while providing 12V-2x6 cable. FSP has been including this connector standard for a few months, and Seasonic has its way of assuring its users that the 12V-2x6 is perfectly fine.

With small form factors becoming more popular, even with flagship graphics cards, the Extreme 1200R Platinum will likely cater to compact but powerful SFF builds.

Freelance News Writer
  • Papusan
    What a failure. f you have one of the Asus motherboards and jump on a newer used Nvidia or the newest AMD Radeon graphics card, then you'll lack 8-pin connectors from the PSU. Many Asus MB need 8-pin connectors (2x8-pin for the Cpu and 1x8 pin for the MB). All you have left is a single wimpy 8-pin power connector. Not much to power newer modern graphics cards. This PSU isn't meant for other graphics cards than low entry or and brand new nvidia cards with the 12+4 melting mess. Sometimes form factor beat functionality. I wonder how much the saved removing some of the 8-pin power connectors from the PSU panel. They also saved a few $ going with less cables.
    Reply
  • coromonadalix
    same story of forced upgrades :(
    Reply
  • thestryker
    Papusan said:
    What a failure. f you have one of the Asus motherboards and jump on a newer used Nvidia or the newest AMD Radeon graphics card, then you'll lack 8-pin connectors from the PSU. Many Asus MB need 8-pin connectors (2x8-pin for the Cpu and 1x8 pin for the MB). All you have left is a single wimpy 8-pin power connector. Not much to power newer modern graphics cards. This PSU isn't meant for other graphics cards than low entry or and brand new nvidia cards with the 12+4 melting mess. Sometimes form factor beat functionality. I wonder how much the saved removing some of the 8-pin power connectors from the PSU panel. They also saved a few $ going with less cables.
    What are you talking about? This PSU has a standard ATX power cable for motherboard, 2x EPS12V 8 pin (4+4) CPU cables and 4x PCIe 8 pin (6+2) cables.
    Reply
  • qwertymac93
    thestryker said:
    What are you talking about? This PSU has a standard ATX power cable for motherboard, 2x EPS12V 8 pin (4+4) CPU cables and 4x PCIe 8 pin (6+2) cables.
    It doesn't look like you can use some of the PCI-E cables if you use any of the 8-pin EPS connectors as they share space on the modular plate. If you want to use multiple high-end GPUs, being limited to just two or three 8-pin connectors would be a problem. Perhaps Silverstone offers some adapters/cables that'd allow the use of the peripheral ports or the 12v-2x6 port to add more PCI-E connectors.
    Reply
  • thestryker
    qwertymac93 said:
    It doesn't look like you can use some of the PCI-E cables if you use any of the 8-pin EPS connectors as they share space on the modular plate. If you want to use multiple high-end GPUs, being limited to just two or three 8-pin connectors would be a problem. Perhaps Silverstone offers some adapters/cables that'd allow the use of the peripheral ports or the 12v-2x6 port to add more PCI-E connectors.
    No that's not a problem the cables each have 2x 6+2 connectors so you can still have up to 4 with the 2x EPS12V. I can see why you'd think that given that the article isn't specific regarding the cables. I did mistype cables though there's only 2x PCIe cables, but 4x connectors.
    Reply
  • Amdlova
    Safer :) can't be wrong... at next launch new series will have "five safe upgrades"
    nvidia and pci-sig need to be sued and pay for the E-waste... How many good PSU will be trash because those SAFER updates!
    Reply