Quick answer: For most people in 2026, the best psus under $100 is the Thermaltake Smart 500W 80+ White — our #1 rated choice. See the full ranked comparison, alternatives and buying advice below.
Top Psus Under 100 Picks for 2026
Here are our current top psus under 100 picks, compared on real Amazon owner reviews, price, and features. Live prices update below.
The power supply is the one component you should never cheap out on blindly, but that does not mean you have to overspend. Plenty of solid, well-rated units land comfortably under $100, covering everything from a modest 500W office or entry-gaming build to a fully modular 850W kit with room for a mid-range graphics card. The trick is matching the wattage to your actual hardware and reading the 80 PLUS efficiency badge correctly so your dollars buy clean, stable power rather than marketing. This guide rounds up the best PSUs under $100 in 2026, with each pick’s true wattage flagged up front.
Our picks were chosen on what genuinely matters at this price: real continuous wattage, 80 PLUS efficiency tier (White, Bronze or Gold), modularity for tidier cabling, and overall value. We have spread the list across the wattage tiers people actually shop — 500W, 650W, 700W, 750W and 850W — with prices from around $40 up to around $110. One unit on this list, the MSI MPG A850G, carries a list price slightly above $100, so we are upfront: it is included as the ‘just over budget’ 850W Gold option for anyone whose build pushes past the sub-$100 tier. Below is an at-a-glance comparison of all six, then a closer look at each and a buyer’s guide built around wattage and efficiency.
Best PSUs under $100 at a Glance
| Power Supply | Best For | Standout Spec | Approx Price |
|---|---|---|---|
| Thermaltake Smart 500W 80+ White | Entry / office builds | 500W, 80+ White, 120mm fan | around $40 |
| MSI MAG A650BN 650W 80+ Bronze | Budget gaming under $60 | 650W, 80+ Bronze, low-noise | around $60 |
| Thermaltake Smart 700W 80+ White | Cheap headroom | 700W, 80+ White, continuous | around $55 |
| ARESGAME AGT 850W 80+ Gold Modular | Value 850W Gold | 850W, Gold, fully modular | around $75 |
| MSI MAG A750GL 750W 80+ Gold PCIe 5 | Modern GPU power | 750W Gold, PCIe 5, modular | around $87 |
| MSI MPG A850G 850W 80+ Gold PCIe 5 | High-end (just over $100) | 850W Gold, PCIe 5, modular | around $110 |
1. Thermaltake Smart 500W 80+ White Certified PSU, Continuous Power 120mm Fan
Thermaltake Smart 500W 80+ White Certified PSU, Continuous Power with 120mm Ultra Quiet Cooling Fan, ATX 12V V2.3/EPS 12V Active PFC Power Supply PS-SPD-0500NPCWUS-W
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The Thermaltake Smart 500W is the entry-level pick and the cheapest unit here at around $40. It is an 80 PLUS White certified power supply rated for 500W of continuous output, cooled by a quiet 120mm fan. For an office machine, a home-theatre PC, or an entry gaming build with integrated or low-power graphics, 500W of dependable continuous power is exactly the right size — and the price is hard to argue with.
This is the PSU to choose when your system is genuinely modest and you do not need a power-hungry graphics card. The 500W continuous rating (note: a real continuous figure, not a peak gimmick) comfortably handles a CPU plus a modest GPU or integrated graphics, the 80 PLUS White badge keeps efficiency respectable for the cost, and Thermaltake’s long track record adds peace of mind. If you are building lean and want to spend your budget elsewhere, the Smart 500W is the sensible, low-cost foundation.
Pros: Genuine 500W continuous, 80+ White efficiency, quiet 120mm fan, lowest price here.
Cons: 500W limits GPU choices; non-modular cabling, White not Gold.
2. MSI MAG A650BN, Non-Modular Compact 650W Power Supply, 80+ Bronze, Low-Noise Fan
Prime MSI MAG A650BN, Non-Modular Compact 650W Power Supply, 80+ Bronze, Low-Noise Fan, Active PFC Design, 5 Year Warranty
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The MSI MAG A650BN is the budget-gaming pick, delivering a useful 650W at 80 PLUS Bronze efficiency for around $60. The compact, non-modular design keeps the cost down while the low-noise fan keeps the build quiet, and 650W is a genuinely practical wattage for a mainstream 1080p gaming PC paired with a mid-range graphics card. It is the sweet spot for value gamers who want a step up from the bare minimum without breaking $100.
This is the PSU for the gamer building a sensible 1080p or entry 1440p rig who wants enough headroom for a popular mid-range GPU. The 650W continuous output covers those builds with margin to spare, the 80 PLUS Bronze rating improves efficiency over a White unit so the system runs a touch cooler and cheaper, and MSI’s low-noise fan keeps acoustics in check. For dependable mainstream gaming power at a true budget price, the A650BN is an easy recommendation.
Pros: Practical 650W for mainstream gaming, 80+ Bronze, low-noise fan, strong sub-$60 value.
Cons: Non-modular cabling; Bronze rather than Gold efficiency.
3. Thermaltake Smart 700W 80+ White Certified PSU, Continuous Power 120mm Fan
Thermaltake Smart 700W 80+ White Certified PSU, Continuous Power with 120mm Ultra Quiet Fan, ATX 12V V2.3/EPS 12V Active PFC Power Supply PS-SPD-0700NPCWUS-W
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The Thermaltake Smart 700W is the cheap-headroom pick, offering a generous 700W of continuous power at around $55 — remarkable wattage for the money. It carries an 80 PLUS White certification and the same quiet 120mm fan as its smaller sibling, but the extra 200W over the 500W model gives a build real breathing room for a more demanding graphics card or future upgrades.
This is the PSU to choose when you want maximum wattage per dollar and are not chasing a Gold efficiency badge. The 700W continuous rating provides ample headroom for a mid-range or even upper-mid-range GPU, which keeps the unit running well within its limits and quieter under load, and the rock-bottom price leaves more budget for the parts that affect performance. If your priority is plenty of stable power for as little money as possible, the Smart 700W delivers exactly that.
Pros: Generous 700W continuous, 80+ White, quiet 120mm fan, outstanding wattage per dollar.
Cons: Non-modular; 80+ White is the basic efficiency tier.
4. ARESGAME AGT Series 850W Power Supply, 80+ Gold Certified, Fully Modular, FDB Fan
Prime ARESGAME AGT Series 850W Power Supply, 80+ Gold Certified, Fully Modular, FDB Fan, Compact 140mm Size, 10 Year Warranty, ATX Gaming Power Supply
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The ARESGAME AGT 850W is the value-Gold standout, packing a fully modular 850W unit with 80 PLUS Gold certification into a sub-$80 price. At around $75 it undercuts most Gold-rated 850W competitors significantly, and the fully modular cabling plus a fluid-dynamic-bearing (FDB) fan make it punch well above its cost for a clean, quiet, efficient build.
This is the PSU for the value-focused builder who wants serious wattage and Gold efficiency without paying flagship prices. The 850W output gives generous headroom for a powerful GPU and future upgrades, the 80 PLUS Gold rating means less wasted power and heat than Bronze or White units, and the fully modular design lets you connect only the cables you need for tidier airflow. For the most wattage and efficiency per dollar under $100, the ARESGAME AGT 850W is the headline value pick of this list.
Pros: 850W fully modular at 80+ Gold for under $80, quiet FDB fan, exceptional value.
Cons: Less established brand than tier-one names; verify your case clearance.
5. MSI MAG A750GL PCIE5, Fully Modular Compact Gaming 750W Power Supply, 80+ Gold
MSI MAG A750GL PCIE5, Fully Modular Compact Gaming 750W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2x6 Cable, 10 Year Warranty
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The MSI MAG A750GL is the modern-GPU pick, a fully modular 750W unit with 80 PLUS Gold efficiency and native PCIe 5.0 support for around $87. The PCIe 5 readiness means it ships with the 12VHPWR-style connector that current and upcoming graphics cards use, so you avoid adapter clutter, and 750W is the wattage many recommend for a strong single-GPU gaming build.
This is the PSU to choose if you are building around a modern graphics card and want a future-proof, efficient, tidy supply that still sneaks under $100. The 750W Gold rating delivers clean, efficient power with sensible headroom for a high-performance GPU, the PCIe 5.0 connector keeps cabling native and neat, and the fully modular compact design fits a wide range of cases. For a current-generation gaming build that wants Gold efficiency and PCIe 5 support on a budget, the A750GL is the smart choice.
Pros: 750W 80+ Gold, native PCIe 5.0 connector, fully modular and compact, under $100.
Cons: 750W may be tight for the very highest-end GPUs; pricier than Bronze units.
6. MSI MPG A850G PCIE5, Fully Modular Compact Gaming 850W Power Supply, 80+ Gold
MSI MPG A850G PCIE5, Fully Modular Compact Gaming 850W Power Supply, 80+ Gold, Native 12V-2x6 Cable, 100% Japanese Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, 10 Year Warranty
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Rounding out the list is the MSI MPG A850G, included with full transparency: at around $110 its list price sits just above our $100 ceiling, so it is the ‘just over budget’ option for builds that need more. It is a step up from the A750GL — a fully modular 850W unit with 80 PLUS Gold efficiency and native PCIe 5.0 support, from MSI’s higher MPG line. If your hardware pushes past the sub-$100 tier, this is the unit to stretch for.
This is the PSU to choose when an 850W Gold supply with PCIe 5 support is worth a small premium for the extra headroom and brand pedigree. The 850W output comfortably powers a high-end single-GPU gaming build with margin for upgrades, the 80 PLUS Gold rating keeps efficiency high, and the native PCIe 5.0 connector avoids adapters on the latest cards. We are honest that it edges over $100, but as the most capable unit here it earns its place for buyers whose system demands it.
Pros: 850W 80+ Gold, native PCIe 5.0, fully modular, MSI MPG pedigree with strong headroom.
Cons: List price is slightly above $100, so technically over the sub-$100 budget.
How to Choose a PSU Under $100
Choosing a power supply on a budget starts with right-sizing the wattage to your actual hardware. A power supply does not draw its full rating constantly — it supplies what the system asks for — so the goal is enough headroom to run comfortably, not the biggest number you can find. An entry build with integrated or low-power graphics is well served by the 500W Thermaltake; a mainstream 1080p gaming rig fits the 650W or 700W tier; and a powerful single-GPU build wants 750W or 850W like the MSI and ARESGAME units. Buy for your real components plus a sensible margin.
Efficiency is the next thing to read, and the 80 PLUS badge tells you how much wall power actually reaches your components rather than being lost as heat. 80 PLUS White (as on the Thermaltake Smart units) is the basic tier, Bronze (the MSI A650BN) is a step up, and Gold (the ARESGAME AGT, MSI A750GL and A850G) is the most efficient here. A higher tier wastes less power, runs a little cooler and quieter, and costs slightly more — so weigh the small price bump against years of lower running heat. Even on a budget, Gold is worth targeting when you can reach it.
Modularity and connectors are practical details that affect your build’s tidiness and compatibility. A fully modular unit like the ARESGAME AGT, MSI A750GL or A850G lets you attach only the cables you need, which improves airflow and makes cable management far easier; non-modular units like the Thermaltake and MSI Bronze models are cheaper but leave you tucking away unused cables. If you run a modern graphics card, prioritise native PCIe 5.0 support (the two MSI Gold units offer it) so you avoid messy adapters.
Finally, set your budget against your needs and be realistic about the sub-$100 line. Most builds are genuinely well served under $100 — the 750W MSI A750GL Gold proves you can get a modern, efficient, modular unit for around $87. Only stretch to the slightly-over-budget A850G if your hardware truly calls for 850W of Gold-rated power. Match the wattage to your parts, target the best efficiency tier you can afford, favour modular cabling and native connectors, and pick the PSU on this list that fits your build and your budget. A well-chosen supply is the quiet, reliable backbone of the whole system.
Frequently Asked Questions
How many watts does my PSU need?
Match the wattage to your hardware plus a sensible margin. An entry build with integrated or low-power graphics is fine on 500W like the Thermaltake Smart; a mainstream 1080p gaming PC suits the 650W or 700W tier; and a powerful single-GPU build wants 750W or 850W like the MSI A750GL or ARESGAME AGT. A PSU only draws what the system asks for, so you want enough headroom to run comfortably, not just the biggest number.
What does the 80 PLUS rating actually mean?
It measures efficiency — how much wall power reaches your components instead of being lost as heat. 80 PLUS White (the Thermaltake Smart units) is the basic tier, Bronze (the MSI A650BN) is better, and Gold (the ARESGAME, MSI A750GL and A850G) is the most efficient here. A higher tier wastes less power, runs cooler and quieter, and is worth the small premium when your budget allows.
Is a modular power supply worth it on a budget?
It is a real convenience. A fully modular unit like the ARESGAME AGT or MSI A750GL lets you connect only the cables you actually need, which improves airflow and makes cable management much easier. Non-modular units like the Thermaltake Smart models are cheaper but leave unused cables to tuck away. If tidiness and airflow matter to you, the modular Gold units here are worth the extra few dollars.
Can I really get a good PSU for under $100?
Absolutely. Five of the six units here list under $100, including the fully modular 750W MSI A750GL Gold at around $87 and the 850W ARESGAME AGT Gold at around $75. We have flagged the one exception, the MSI MPG A850G at around $110, as a ‘just over budget’ option for high-end builds. For the vast majority of systems, an excellent, efficient supply is comfortably available under $100.
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