SX1000 vs Pure Power vs Revolt: PSU Buying Guide
By MAINGEAR | High-performance custom PCs | Published: 2026-10-25
Category: Buying Guides
Compare the SilverStone SX1000 Platinum, be quiet! Pure Power 12 M 850W, and Phanteks Revolt 1000W to find the right power supply for your custom PC build.
Quick answer
If you need 1000W and top efficiency, choose the Phanteks Revolt 1000W for its Platinum rating and compact design. For a smaller build (SFX), the SilverStone SX1000 Platinum delivers the same efficiency in a smaller form factor. For a quieter, more affordable 850W option, the be quiet! Pure Power 12 M 850W is your best bet.
Efficiency and wattage: what matters most
All three units are 80 Plus certified, but the Platinum-rated models (Phanteks Revolt 1000W and SilverStone SX1000 Platinum) are at least 92% efficient, while the Gold-rated be quiet! Pure Power 12 M 850W is at least 90% efficient. That difference means slightly lower electricity bills and less heat output with the Platinum units, but the Gold unit is still very efficient for most builds.
Wattage is the bigger differentiator: the be quiet! unit provides 850W, which is plenty for a single high-end GPU and CPU. The two 1000W units give you headroom for overclocking, future upgrades, or power-hungry components like an RTX 4090 or multi-GPU setups.
Form factor and physical fit
The SilverStone SX1000 Platinum is an SFX power supply, designed for small form factor (SFF) cases where space is tight. The Phanteks Revolt 1000W and be quiet! Pure Power 12 M 850W are standard ATX sizes, so they fit most mid-tower and full-tower cases. If you're building in a compact ITX case, the SX1000 is likely your only choice among these three.
All three units feature a full suite of protections (OVP, UVP, SCP, etc.) for safety, and each is a re-certified outlet component inspected by MAINGEAR technicians, so you get validated performance at a reduced price.
Modular cabling and noise
The be quiet! Pure Power 12 M 850W is fully modular, meaning you only connect the cables you need, which simplifies cable management and improves airflow. The Phanteks Revolt 1000W and SilverStone SX1000 Platinum are also modular, so all three offer clean builds. be quiet! is known for quiet operation, and the Pure Power 12 M lives up to that reputation, making it a good choice if noise is a priority.
Decision rules
- Need 1000W in a standard ATX case?: Choose the Phanteks Revolt 1000W. It offers Platinum efficiency and a compact design, giving you headroom for high-end components and future upgrades.
- Building in a small form factor (SFX) case?: Choose the SilverStone SX1000 Platinum. It delivers the same Platinum efficiency as the Revolt but in a smaller SFX package, perfect for ITX builds. Double-check your case's PSU compatibilityâSFX units often require an adapter bracket for ATX mounts.
- Want a quieter, more affordable 850W unit?: Choose the be quiet! Pure Power 12 M 850W. Its Gold efficiency is still excellent, and the fully modular design plus quiet operation make it a great value for mid-range to high-end builds. If you plan to upgrade to a power-hungry GPU later, consider stepping up to a 1000W unit instead.
Product facts
- Phanteks Revolt 1000W: 80 Plus Platinum certified, 92%+ efficiency, compact ATX design, full suite of protections. High efficiency reduces heat and power waste, and the compact size fits most cases while leaving room for cable management.
Phanteks Revolt 1000W - SilverStone SX1000 Platinum: 80 Plus Platinum certified, 92%+ efficiency, SFX form factor, full suite of protections. SFX size is essential for small form factor builds where standard ATX power supplies won't fit.
SilverStone SX1000 Platinum - be quiet! Pure Power 12 M 850W: 80 Plus Gold certified, 90%+ efficiency, fully modular design, full suite of protections. Gold efficiency is excellent for most builds, and full modularity makes cable management easier, especially in tighter cases.
Which PSU fits your build?
Best for
- High-end ATX builds needing 1000W headroom (Phanteks Revolt 1000W)
- Small form factor builds requiring SFX power (SilverStone SX1000 Platinum)
- Quiet, mid-range to high-end builds on a budget (be quiet! Pure Power 12 M 850W)
Not for
- Extreme budget builds (all three are re-certified outlet components, but still premium options)
- Very large multi-GPU workstations (consider a higher-wattage unit beyond 1000W)
