ASRock B550 Phantom Gaming 4
ASRock
Current comparison price
$100Value · Balanced63
from 1 offer · checked Oct 29
Capability highlights · price excluded
- C Gaming Build
- D Workstation
- D Small-Case Fit
ASRock B550 Phantom Gaming 4 vs ASUS PRIME B450M-K II
Compare ASRock B550 Phantom Gaming 4 and ASUS PRIME B450M-K II in the United States side by side across price, specifications, capability by use case and the price at which the answer changes.
Market snapshot Oct 29, 2026 · USD
Specifications, performance and current prices compared in United States · USD · prices checked through Oct 29, 2026
ASUS PRIME B450M-K II
ASUS
Current comparison price
$99Value · Balanced25
from 1 offer · checked Oct 29
Capability highlights · price excluded
- C Gaming Build
- C Small-Case Fit
- D Workstation
Key differences at a glance
Capabilityprice excluded
Scenarios won: ASRock B550 Phantom Gaming 4 0, ASUS PRIME B450M-K II 1, even 2. ASUS PRIME B450M-K II is ahead for Small-Case Fit. View grades →
Valueunder Balanced
ASRock B550 Phantom Gaming 4 has the higher Value under these priorities (63 vs 25).
Pricecurrent market snapshot
ASUS PRIME B450M-K II costs less right now ($99 vs $100, 1% apart).
How priorities change the comparison Presets with the higher Value: ASRock B550 Phantom Gaming 4 3 · ASUS PRIME B450M-K II 0 · even 1
| Priority | ASRock B550 Phantom Gaming 4 | ASUS PRIME B450M-K II | |
|---|---|---|---|
| 63 | 25 | ||
| 44 | 15 | ||
| 23 | 3 | ||
| 23 | 24 | even |
Pick a preset to compare under it: the whole page follows. Within 2 points counts as even.
Data note: 1 compared facts not tracked
- ASUS PRIME B450M-K II: Wi-Fi
Not tracked means our source data does not have the fact; it is never treated as absent. Inferred figures come from the reference model of the same chip.
Price difference and break-even price
Under Balanced, each product holds or loses the higher Value at one price, with the other held at its current price. Enter the prices you were actually offered to see the answer for your deal.
ASRock B550 Phantom Gaming 4
Current comparison price
$100 63
ASRock B550 Phantom Gaming 4 keeps the higher Value up to $383 (with ASUS PRIME B450M-K II at $99).
ASUS PRIME B450M-K II
Current comparison price
$99 25
ASUS PRIME B450M-K II matches the Value of ASRock B550 Phantom Gaming 4 (at $100) at $26 or less.
A crossover is a calculation under the active priorities and today's market frame, not a price forecast.
Price comparison: current offers
New offers we track in United States (USD), cheapest first, with the date each was checked. Amazon appears as a link only: its price is not shown and never enters Value.
ASRock B550 Phantom Gaming 4
- Check on AmazonAmazonAffiliate link · price shown on AmazonCheck price →
- $100ASRock B550 Phantom Gaming 4 (ATX)Newegg · checked · Affiliate linkGo to offer →
ASUS PRIME B450M-K II
- Check on AmazonAmazonAffiliate link · price shown on AmazonCheck price →
- $99ASUS PRIME B450M-K II (Micro ATX)Newegg · checked · Affiliate linkGo to offer →
Affiliate links may earn us a commission. They never change the prices shown here, the ranking or Value.
Performance and key differences
What each product can do for a job, graded S to F with price left out, and the measured indexes behind it.
View full tier list and performance rankings
| ASRock B550 Phantom Gaming 4 | ASUS PRIME B450M-K II | |
|---|---|---|
| Gaming Build | C #742 | C #520 |
| Workstation | D #657 | D #888 |
| Small-Case Fit | D #918 | C #206 |
| Features | 64 | 33 |
| Connectivity | 27 | 12 |
| Memory support | 56 | 28 |
Where each one leads
- Higher Value with these priorities
- Lower current price
Specifications compared
Facts true of every board a product groups; a range or "varies" marks a fact that differs between boards.
4 identical facts hidden
| ASRock B550 Phantom Gaming 4 | ASUS PRIME B450M-K II | |
|---|---|---|
| Platform | ||
| Chipset | AMD B550 | AMD B450 |
| Form factor | ATX | Micro ATX |
| Memory | ||
| Memory slots | 4 | 2 |
| ECC | Yes | No |
| Storage and connectivity | ||
| M.2 slots | 1 | 2 |
| Wi-Fi | Yes | Not tracked |
| Product | ||
| Brand | ASRock | ASUS |
Not tracked means the source data does not have this fact. It is not assumed to be absent.
Which one to choose: where each wins
Conditions drawn from the data above, not a universal recommendation. The better choice depends on which of these matter to you.
ASRock B550 Phantom Gaming 4 fits better when…
- Features matters: higher index
- Connectivity matters: higher index
- Memory support matters: higher index
- your priorities are Balanced: higher Value
ASUS PRIME B450M-K II fits better when…
- the job is Small-Case Fit: higher capability grade
- the budget decides: 1% lower current price
Nearby market alternative
Worth considering instead
ASUS PRIME Z370-P II — same C-tier capability for Gaming Build, about $44 cheaper · Value 35.
Neither of the two above is the only answer — this one clears the same bar for less. ⇄ Compare all three
Questions and methodology
Which one is better, ASRock B550 Phantom Gaming 4 or ASUS PRIME B450M-K II?
It depends on the question. For capability (price left out) see the grades by use case; for how good the current price is for what you get, see Value under your priorities; and for the cheapest option today, see current prices. This page keeps the three apart and does not name one overall winner.
Which has the higher Value right now?
Under Balanced, ASRock B550 Phantom Gaming 4 has the higher Value (63 vs 25) in the market snapshot of Oct 29, 2026. Value changes with your priorities and with prices.
At what price does the answer change?
Under Balanced, with ASRock B550 Phantom Gaming 4 at its current price, ASUS PRIME B450M-K II reaches equal Value at $26. It is a calculation, not a price forecast.
Which one is more capable, ignoring price?
Scenarios won: ASRock B550 Phantom Gaming 4 0, ASUS PRIME B450M-K II 1, even 2. ASUS PRIME B450M-K II is ahead for Small-Case Fit.
Where can I compare current offers?
The offers section lists every new offer we track for both products in United States, with the date each price was checked. Open in Compare to add more products.