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be quiet! Straight Power 12 850W — 850 W · Platinum
be quiet!

be quiet! Straight Power 12 850W

850 W · Platinum

90
/ 100
From $199
VS
Corsair RM850x Shift — 850 W · Gold
Corsair

Corsair RM850x Shift

850 W · Gold

90
/ 100
From $179
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, be quiet! Straight Power 12 850W lands at 90 and Corsair RM850x Shift at 90. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick be quiet! Straight Power 12 850W if…

  • ✓Modular cabling on most
  • ✓ATX 3.1 / 12V-2x6 support
  • ✓10-year warranty on many

Pick Corsair RM850x Shift if…

  • ✓Modular cabling on most
  • ✓ATX 3.1 / 12V-2x6 support
  • ✓10-year warranty on many
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Efficiency

Tie

Compared on the efficiency sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Noise

Tie

Compared on the noise sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Cables

Tie

Compared on the cables sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Value for money

Corsair RM850x Shift

Specdex score per dollar at MSRP

Corsair RM850x Shift more score per dollar ($179 vs $199).

be quiet! Straight Power 12 850W 90
vs
90 Corsair RM850x Shift

Score breakdown

be quiet! Straight Power 12 850W
90
efficiency 90
noise 86
cables 86
value 84
Corsair RM850x Shift
90
efficiency 90
noise 86
cables 86
value 84

Specs side-by-side

be quiet! Straight Power 12 850W versus Corsair RM850x Shift — full spec comparison
Spec be quiet! Straight Power 12 850W Corsair RM850x Shift
Wattage
850 W
850 W
Efficiency
Platinum
Gold

be quiet! Straight Power 12 850W

Pros
  • +Modular cabling on most
  • +ATX 3.1 / 12V-2x6 support
  • +10-year warranty on many
Cons
  • −Bulky on higher wattages
  • −Fan noise varies by load
  • −Cable length may not fit some cases

Corsair RM850x Shift

Pros
  • +Modular cabling on most
  • +ATX 3.1 / 12V-2x6 support
  • +10-year warranty on many
Cons
  • −Bulky on higher wattages
  • −Fan noise varies by load
  • −Cable length may not fit some cases

FAQ: be quiet! Straight Power 12 850W vs Corsair RM850x Shift

Which is better, be quiet! Straight Power 12 850W or Corsair RM850x Shift? +

Both score 90 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is be quiet! Straight Power 12 850W worth the price? +

At $199, be quiet! Straight Power 12 850W delivers a Specdex score of 90 — strongest in efficiency.

Is Corsair RM850x Shift worth the price? +

At $179, Corsair RM850x Shift delivers a Specdex score of 90 — strongest in efficiency.

Does be quiet! Straight Power 12 850W or Corsair RM850x Shift last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.

Which is the better value, be quiet! Straight Power 12 850W or Corsair RM850x Shift? +

Corsair RM850x Shift — more score per dollar ($179 vs $199). Specdex score per dollar at MSRP.