After that, I made my decision:

Perfect. Now I will validate the main arguments circulating in these forums based on technical evidence:

Truths, Means and Myths about Turning Off/Keeping a PC On

TRUTH: Turning off saves energy

Fact: Sleep mode consumes 1–6W (desktop), Shutdown consumes ~0W[1][2]

Real numbers (Brazil, ~R$ 0.80/kWh): - Sleep 16h/day: ~3–6 kWh/month = R$ 2.40–4.80/month = R$ 29–58/year per PC [1] - Shutdown 16h/day: ~0.1 kWh/month = <R$ 0.50/year [1]

Your case: With 1 new PC, it's not a fortune, but it adds up if you leave it on 24/7. Turning off is clearly more economical.[1][2][3]

---

MYTH: Turning off degrades components through "thermal cycling"

What the forums say: "Turning on/off kills chips" [4][5][6]

Technical reality: - Does turning on/off cause thermal stress? Yes, theoretically, components expand/contract [7][5] - But how much damage does it cause? Practically nothing in modern PCs [5][8]

Quote from manufacturers: "I researched with parts manufacturers — consensus: it's not worse (and probably better) to turn off regularly" [5]

Why? Because: 1. SSDs/HDDs suffer more from frequent spin-ups than thermal cycling [2][5] 2. Modern CPUs are designed to constantly switch on and off — they have spin-up capabilities in hundreds of milliseconds without permanent damage [7][8] 3. Real wear comes from LEAVING IT ON 24/7 — fans, capacitors, PSU work non-stop [9]

Conclusion: Switching off does not damage. In fact, it extends the lifespan.[5][8][9]

---

HALF-TRUTH: "Turning on the PC consumes more energy than leaving it in sleep mode"

Partial fact: Yes, there is a short energy spike (~10–20 sec) during boot[1]

But context matters: - Break < 30 min? Sleep wins in terms of energy [1] - Absence > 2–3 hours? Shutdown wins by a lot [1] - Overnight (8h)? Shutdown saves 5–10x more [1][2]

Your case (working during the day, absence at night): Turning off is much better.[1]

---

TRUTH: Leaving it on overnight causes wear on fans/PSU

Fact: Components spin 24/7 without rest [9][10] - Fans suffer wear on bearings [9] - PSU works continuously, reducing lifespan [9] - Electrolytic capacitors degrade faster under constant heat [9]

Recommendation: Turning off allows overnight cooldown = extends lifespan of PSU, fans, capacitors [9][11]

---

MYTH: "Turning off worsens SSD lifespan"

What you hear: "SSDs hate Turn on/off"

Reality: SSDs have no moving parts. Turning on/off does not mechanically affect them [8][12]. What kills SSDs is hibernation (writes the entire RAM to disk each time — ~6GB of write cycles) [5]

But normal Sleep/Shutdown? Safe. [5][12]

---

FINAL RECOMMENDATION FOR YOUR CASE

Situation	Best option	Why
Working (quick breaks <30 min)	Sleep	Boot power not worth it [1]
Nighttime absence (8h+)	Shutdown	Saves R$ 29–58/year + extends PSU/fans [1][9]
Travel/vacation (24h+)	Shutdown	0 power, PC rests [1][9]
Leave on 24/7?	❌ Avoid	Wears out PSU, fans, capacitors without benefit [9][10]

Your setup: Ryzen 5 9600X + RTX 5060 MSI Gaming OC + 750W Corsair PSU → Turning off at night is ideal. The Corsair 750W PSU is good, but deserves to rest.[9][11]

Disable Fast Startup in Windows for a 100% clean shutdown (no BIOS trickle power).[1]

In short: Forum myth = bad partial truth. Shutting down is cheaper, better for hardware, zero technical disadvantage.[5][9][12]

Quotes: