Antec
Antec MEGA 850W 80 Plus Gold Fully Modular ATX Power Supply
In stock
SKU MEGA850
R 1 799,00
Or pay in up to 6 interest-free instalments from R 299,83 with Stitch Pay Later.
Courier delivery R180 (free on orders of R2 500 or more): 1–3 working days to Johannesburg, Pretoria, Cape Town, Durban and within 100km of them, 2–4 working days further out. Express 1–2 working days for R210 (R150 on orders of R2 500 or more).
| Delivering to | Time | Cost |
|---|---|---|
| Major centres: Johannesburg, Pretoria, Cape Town, Durban and within 100km of them | 1–3 working days | R180, free from R2 500 |
| More than 100km from a major centre | 2–4 working days | R180, free from R2 500 |
| Express delivery, anywhere | 1–2 working days | R210, R150 from R2 500 |
| Collect from Edenvale | When we tell you it’s ready | Free |
- Courier delivery is R180 on orders under R2 500 and free on orders of R2 500 or more. Choose express or collection at checkout.
- Times count from the day your order is dispatched. Orders placed before 12:00 on a working day ship the same day; after 12:00, on weekends or on public holidays they ship the next working day.
- Pre-built PCs and PC Builder builds need 2–4 extra working days to assemble and test before they ship.
- The area check is a guide based on your postal code, and delivery times are the courier’s estimates. Please make sure your address and postal code are correct — an incorrect address delays delivery.
- Full shipping policy
- Free courier delivery over R2 500 Anywhere in South Africa. R180 on orders under R2 500
- Official warranty Local South African warranty and support
- Expert help Talk to a builder before you buy
A native 16-pin 12V-2x6 cable comes in the box, so an RTX 50-series card plugs straight in without the four-headed adapter block.
Quick Specs
- 850W output, 80 PLUS Gold certified (up to 92% efficient)
- ATX 12V 3.1 and PCIe 5.1 compliant
- Fully modular cable set
- 120mm HDB silent fan
- 7-year warranty
Sizing it against a real build
850W is the bracket most single-GPU gaming builds land in. A Ryzen 7 or Core i5 paired with an RTX 5070 Ti or 5080, or a Radeon RX 9070 XT, sits comfortably under it with room for the transient spikes modern cards throw at a supply. ATX 12V 3.1 is the part that matters there: the standard asks the unit to ride out excursions well above its rated output instead of tripping protection mid-frame. If you are planning a 5090 or a dual-GPU workstation, skip this one and look at the MEGA 1000 instead.
What the cable set actually gives you
Fully modular means you plug in only what the build uses, which matters more in a shallow mid-tower than most people expect. You get one 24-pin motherboard cable, two 8-pin (4+4) CPU cables so a high-end board with dual EPS headers is covered, three 8-pin (6+2) PCIe cables, seven SATA and two Molex. The 16-pin 12V-2x6 GPU cable is native rather than an adapter, which removes the stacked connector stub that fouls side panels in tight cases. Seven SATA leaves room for a couple of drives and a fan controller.
FEATURES:
- 80 PLUS Gold efficiency, rated up to 92%
- ATX 12V 3.1 design built around modern GPU power excursions
- Native PCIe 5.1 16-pin (12+4) 12V-2x6 GPU connector
- 120mm HDB silent fan
- Full protection set: OCP, OVP, UVP, SCP, OPP, OTP, SIP and NLO
SPECIFICATIONS:
- Model: Antec MEGA850 Gold
- Maximum output: 850W
- Efficiency: 80 PLUS Gold, up to 92%
- ATX version: ATX 12V 3.1
- PCIe version: PCIe 5.1
- Cable configuration: Fully modular
- Fan: 120mm HDB silent fan
- Connectors: 1x 24-pin (20+4) motherboard, 1x 16-pin (12+4) PCIe 5.1 12V-2x6, 2x 8-pin (4+4) CPU, 3x 8-pin (6+2) PCIe, 7x SATA, 2x Molex
- Dimensions: 140mm (L) x 150mm (W) x 86mm (H)
- Protections: OCP, OVP, UVP, SCP, OPP, OTP, SIP, NLO
- Power good signal: 100-150ms
- Warranty: 7 years
WHAT'S IN THE BOX:
- Antec MEGA850 Gold power supply
- Modular cable set as listed in the specifications
- AC power cord
- Mounting screws
- User documentation
Why Antec?
Antec has been building power supplies since 1986, and the MEGA line is where its ATX 3.1 platform meets a price a South African builder can actually justify. Local support runs through Syntech, backed by a 7-year warranty.
Key details
| Wattage | 850 W |
|---|---|
| Efficiency | 80 Plus Gold |
| Modularity | Fully Modular |
| PSU form factor | ATX |
| Category | Power Supplies |
| Brand | Antec |
| Warranty | 7 Years |
Questions
Before you buy
Is this enough power for my build?
It is a 850W supply rated 80 Plus Gold. Add up what your parts need - the graphics card is usually the biggest single draw, and every card we sell lists its recommended system wattage - then leave headroom above that figure. A supply running at roughly half its rating is quieter and lasts longer than one held near its limit.
Is it modular?
It is Fully Modular. Fully modular means every cable unplugs, so you only fit the ones you need; semi-modular keeps the motherboard and CPU cables attached and makes the rest optional; non-modular has them all permanently fixed. It is a tidiness and airflow question rather than a performance one. Never reuse cables from a different supply - the pinouts differ between brands.
Is it in stock, and when will it ship?
Yes - this one is in stock. Order before 12:00 on a working day and it ships the same day; after that it goes out the next working day. We are open 09:00 to 16:30, Monday to Friday, so an order placed over a weekend or a public holiday ships on the next working day.
What does delivery cost, and how long does it take?
We deliver by courier anywhere in South Africa, and delivery is R180 on orders under R2 500 and free on orders of R2 500 or more. It takes 1-3 working days to Johannesburg, Pretoria, Cape Town, Durban and areas within 100km of them, and 2-4 working days to areas more than 100km from a major centre, counted from the day the order is dispatched. Need it sooner? Express delivery is 1-2 working days for R210, or R150 on orders of R2 500 or more - choose it at checkout. We do not ship outside South Africa.
Can I collect instead of having it delivered?
Yes. Collection is from 11 Voortrekker Avenue, Edenvale, Gauteng, by arrangement - message us first so we can have the order picked and waiting. We are open 09:00 to 16:30, Monday to Friday.
What warranty does it carry, and how do I claim?
The warranty period for this product is listed at the end of the Specifications section above. Claims go through us, not the manufacturer - contact us with your order number and a description of the fault and we will handle it from there. Separately from any warranty, the Consumer Protection Act gives you six months from delivery to return goods that are defective, unsafe or not fit for their intended purpose.
What if I change my mind?
You have 14 days from delivery to change your mind - longer than the seven days the Electronic Communications and Transactions Act requires. The item needs to be unused and in its original packaging, and we pay the return shipping. Refunds go back to the payment method you used, within 30 days of the return reaching us.
How can I pay?
Payments are processed by Stitch. At the last step of checkout you are taken to Stitch’s secure page to pay, and brought back here once it is done. Your card details are entered on Stitch’s secure, PCI-compliant page and never touch our systems.
Something not covered here? Read the full FAQ, or WhatsApp us on 079 491 0181.
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