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; the decision sits on which individual spec advantages weigh more for your use.
The Prime Z890-P does not 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 do not 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 says 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 |
Spec-level deep dives
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