ASUS Prime B550-PLUS AC-HES AMD AM4 ATX motherboard vs ASUS ROG STRIX B550-A GAMING ATX AM4 Motherboard
Both are AM4 ATX boards on B550 with four DDR4 slots, 128 GB max, ECC support and Crossfire. The Prime B550-PLUS AC-HES is the value pick at $128.99 at Amazon as of November 3, 2026, and it includes WiFi 5. The ROG Strix B550-A Gaming costs $164.99 at eBay as of November 3, 2026, about $36 more, and is the better-built board for a gaming build with a strong CPU. Buy the Prime if you want WiFi and a lower price; buy the Strix if you want better power delivery and a cleaner look.
Today the ASUS Prime B550-PLUS AC-HES AMD AM4 ATX motherboard costs $36.00 less at its best price.
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ASUS Prime B550-PLUS AC-HES AMD AM4 ATX motherboard
4.4Choose the Prime B550-PLUS AC-HES if you want onboard WiFi 5, a DisplayPort output and the lowest price.
- Cheapest of the two at $128.99.
- WiFi 5 onboard saves a separate card.
- Three video outputs, including VGA for older monitors.
- Dual M.2 and PCIe 4.0 for fast NVMe drives.
- Basic VRM, not ideal for a 16-core Ryzen.
- Only 43 ratings, so less feedback to go on.
- No USB BIOS FlashBack button listed.
What separates them
| ASUS Prime B550-PLUS AC-HES AMD AM4 ATX motherboard | ASUS ROG STRIX B550-A GAMING ATX AM4 Motherboard | |
|---|---|---|
| Price | $128.99 at Amazon as of November 3, 2026 | $164.99 at eBay as of November 3, 2026 |
| Wireless | WiFi 5 built in | No WiFi listed; wired Ethernet only |
| Video outputs | HDMI, DisplayPort and VGA | HDMI and DisplayPort |
| Power delivery | Standard Prime VRM, fine for 6-8 core Ryzen | Stronger VRM aimed at gaming builds |
| M.2 slots | Two M.2 slots, PCIe 4.0 | Two M.2 slots, PCIe 4.0 |
| USB | USB 3.2 Gen 2 Type-C rear and front Type-C header | USB 3.2 Gen 2 with Type-C |
| Looks | Silver and black, plain heatsinks | White and silver gaming styling with RGB header |
| Shopper rating |
Price history
- ASUS Prime B550-PLUS AC-HES AMD AM4 ATX motherboard: lowest $128.99 on Nov 3 at Amazon.
- ASUS ROG STRIX B550-A GAMING ATX AM4 Motherboard: lowest $159.49 on Nov 3 at Techinn.com.
Prices at every store
ASUS Prime B550-PLUS AC-HES AMD AM4 ATX motherboard
- eBayNew
In stockSold by memoryc_deals
$163.22Free shippingObserved at 9:34 AM - AmazonNew
Availability unknown
$128.99Free shippingObserved at 7:49 AM
Also available at
- WalmartCheck price at Walmart
ASUS ROG STRIX B550-A GAMING ATX AM4 Motherboard
- eBayPre-owned
In stockSold by trreusegroup
$164.99Free shippingObserved at 7:50 AM - Newegg.comNew
In stockSold by SIMPLIZED
$349.99Observed at 9:33 AM - eBayNew
Availability unknownSold by trreusegroup
$164.99Observed at 9:33 AM - AmazonNew
Availability unknown
$192.20Observed at 7:50 AM
Also available at
- eBayCheck price at eBay
- Grooves-Inc.comCheck price at Grooves-Inc.com
- MemoryC.comCheck price at MemoryC.com
Specs compared
| Spec | ASUS Prime B550-PLUS AC-HES AMD AM4 ATX motherboard | ASUS ROG STRIX B550-A GAMING ATX AM4 Motherboard |
|---|---|---|
| Form Factor | ATX | ATX |
| Socket Type | Socket AM4 | Socket AM4 |
| RAM Type | DDR4 | DDR4 |
| Expansion Slot | PCI Express | PCI Express |
| ECC Support | Yes | Yes |
| Chipset | AMD | AMD |
| External Ports | Ethernet, VGA, HDMI, DisplayPort, USB | Ethernet, HDMI, DisplayPort, USB |
| Multiple GPU Support | Crossfire | Crossfire |
| Number Of Memory Slots | 4 Memory Slots | 4 Memory Slots |
| Maximum RAM | 128 GB Max RAM | 128 GB Max RAM |
Questions and answers
- Which is better for gaming?
- The ROG Strix B550-A Gaming. Its stronger power delivery handles a Ryzen 7 or Ryzen 9 better, and it has the higher rating. The Prime is fine for a Ryzen 5.
- Do I need a WiFi card with the Strix?
- Yes, unless you use wired Ethernet. The Prime B550-PLUS AC-HES has WiFi 5 built in, so it saves you a card and a slot.
- Is the Strix worth the extra $36?
- If you pair it with a high-core CPU or want the white look, yes. For a budget build with a Ryzen 5, the Prime covers the same basics for less.
- Which has better USB?
- They are close. Both give USB 3.2 Gen 2 and a Type-C port; the Prime also lists a front-panel Type-C header.
- Will either fit a long graphics card?
- Yes. Both are ATX boards with room for long cards and add-in cards. Check your case clearance for the card itself.
- Do both support ECC memory?
- Both list ECC support and four DDR4 slots up to 128 GB. ECC works only with supported Ryzen CPUs and unbuffered ECC DIMMs.