Between the Prime Z890-P and MAG B850 Tomahawk, the Prime Z890-P comes out ahead in several specs, while the MAG B850 Tomahawk wins on wi-fi 7. Overall, the Prime Z890-P scores 65 and the MAG B850 Tomahawk scores 65 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes, with the decision sitting on which individual spec advantages weigh more for your use.
The Prime Z890-P doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the MAG B850 Tomahawk if you care most about wi-fi 7. Its strongest claims are wi-fi 7.
Both ship with comparable max memory, m.2 slots, ram slots, so those specs don't separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.
Why ASUS - Prime Z890-P wins
- No decisive advantages.
Why MSI - MAG B850 Tomahawk wins
- ▲Has Wi-Fi 7.
Spec comparison
Platform
| Spec | ASUS - Prime Z890-P | MSI - MAG B850 Tomahawk |
|---|---|---|
| Socketⓘ | LGA1851 | AM5 |
| Chipset | Z890 | B850 |
| Form factor | ATX | ATX |
Expansion
| Spec | ASUS - Prime Z890-P | MSI - MAG B850 Tomahawk |
|---|---|---|
| RAM slots | 4 | 4 |
| Max memory | 192 GB | 192 GB |
| PCIe slots | 3 | 3 |
| M.2 slotsⓘ | 4 | 4 |
I/O
| Spec | ASUS - Prime Z890-P | MSI - MAG B850 Tomahawk |
|---|---|---|
| USB ports | 10 | 10 |
| 2.5GbE LAN | true | true |
| Wi-Fi 7ⓘ | false | truelead |
Frequently asked
Spec-level deep dives
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