Between the MAG B850 Tomahawk and MEG Z890 Ace, the MAG B850 Tomahawk comes out ahead in several specs, while the MEG Z890 Ace wins on m.2 slots. Overall, the MAG B850 Tomahawk scores 65 and the MEG Z890 Ace scores 76.2 on our Mars Score.
Which should you buy?
The MEG Z890 Ace is the clear pick on raw spec strength, leading by 11.2 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
The MAG B850 Tomahawk 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 MEG Z890 Ace if you care most about m.2 slots. Its strongest claims are m.2 slots.
Both ship with comparable max memory, ram slots, pcie slots, so those specs don't separate the two — focus on the differences below.
Bottom line: the MEG Z890 Ace is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why MSI - MAG B850 Tomahawk wins
- No decisive advantages.
Why MSI - MEG Z890 Ace wins
- ▲M.2 slots — 2.00 more. 6 vs 4.
Spec comparison
Platform
| Spec | MSI - MAG B850 Tomahawk | MSI - MEG Z890 Ace |
|---|---|---|
| Socketⓘ | AM5 | LGA1851 |
| Chipset | B850 | Z890 |
| Form factor | ATX | E-ATXlead |
Expansion
| Spec | MSI - MAG B850 Tomahawk | MSI - MEG Z890 Ace |
|---|---|---|
| RAM slots | 4 | 4 |
| Max memory | 192 GB | 192 GB |
| PCIe slots | 3 | 3 |
| M.2 slotsⓘ | 4 | 6lead |
I/O
| Spec | MSI - MAG B850 Tomahawk | MSI - MEG Z890 Ace |
|---|---|---|
| USB ports | 10 | 14lead |
| 2.5GbE LAN | true | true |
| Wi-Fi 7ⓘ | true | true |
Spec-level deep dives
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