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The Phenom II X6 1100T Black Edition runs on AM3, but because AM3+ sockets are backward-compatible with AM3 chips, the realistic shopping list today is mostly AM3+ boards — they’re the ones still findable new-old-stock or in good used condition. These eight are real AM3/AM3+ boards confirmed compatible with the 1100T, from budget micro-ATX options to full 990FX overclocking boards that let the unlocked Black Edition multiplier actually stretch its legs.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | ASUS M5A99FX PRO R2.0 | $60-$100 (used/NOS) | Amazon · eBay |
| 2 | ASUS M5A99X EVO R2.0 | $50-$90 (used/NOS) | Amazon · eBay |
| 3 | ASUS Sabertooth 990FX R2.0 | $90-$140 (used/NOS) | Amazon · eBay |
| 4 | Gigabyte GA-990FXA-UD3 | $45-$80 (used/NOS) | Amazon · eBay |
| 5 | Gigabyte GA-970A-UD3 | $35-$60 (used/NOS) | Amazon · eBay |
| 6 | MSI 970A-G46 | $30-$55 (used/NOS) | Amazon · eBay |
| 7 | ASRock 990FX Extreme4 | $50-$85 (used/NOS) | Amazon · eBay |
| 8 | ASRock Fatal1ty 990FX Killer | $55-$95 (used/NOS) | Amazon · eBay |
The picks, in detail
ASUS M5A99FX PRO R2.0
A well-regarded AM3+ board with a mature, stable UEFI and strong VRM design — backward-compatible with the AM3 1100T and a common recommendation in owner forum threads.
- AM3+ socket, backward-compatible with AM3 CPUs including the 1100T
- 990FX chipset with solid VRM for sustained loads
- Mature, well-reviewed UEFI
- Frequently cited as a reliable, no-drama board for this exact CPU
- Good balance of overclocking headroom and price
- No longer sold new by major retailers — expect used or new-old-stock
ASUS M5A99X EVO R2.0
A step below the 99FX in chipset tier but still AM3+, offering solid loadline calibration options for tuning the 1100T’s Black Edition unlocked multiplier.
- AM3+ socket, backward-compatible with AM3
- 990X chipset
- Extensive UEFI tuning options for CPU overclocking
- Cheaper than the 99FX while sharing the same UEFI maturity
- High amperage inductors support sustained overclocks
- Fewer PCIe lanes than the 990FX-chipset boards for multi-GPU setups
ASUS Sabertooth 990FX R2.0
ASUS’s reinforced TUF-series AM3+ board, built with heavier-duty components and a longer 5-year warranty than most competing boards of its era.
- AM3+ socket, backward-compatible with AM3
- 990FX chipset with TUF-series component reinforcement
- 5-year manufacturer warranty (original)
- Considered a high-end pick among AM3+ overclocking boards
- Reinforced components appeal to long-term/heavy-use builds
- Commands a premium over the M5A99X/M5A99FX boards on the used market
Gigabyte GA-990FXA-UD3
A widely stocked mid-range AM3+ board that pairs well with the 1100T for a stable build without stretching into 990FX flagship pricing.
- AM3+ socket, backward-compatible with AM3
- 990FX chipset
- ATX form factor with standard expansion slot layout
- One of the most commonly recommended budget-to-mid AM3+ boards in owner comparisons
- Easy to find used given how widely it sold
- 3-year warranty (original), shorter than the ASUS Sabertooth’s 5-year
Gigabyte GA-970A-UD3
A cheaper 970-chipset alternative to the 990FX boards, a sensible pick if multi-GPU support isn’t needed and the goal is just a stable, budget-friendly 1100T build.
- AM3+ socket, backward-compatible with AM3
- 970 chipset (single PCIe x16 focus)
- ATX form factor
- Noticeably cheaper than the 990FX-chipset boards on this list
- Plenty of power delivery headroom for the 1100T specifically
- Fewer PCIe lanes than 990FX boards, so no real multi-GPU support
MSI 970A-G46
A budget-tier 970-chipset AM3+ board specifically recommended in forum threads for pairing with an FX/Phenom-era CPU and a mid-range GPU rather than an overclocking-focused build.
- AM3+ socket, backward-compatible with AM3
- 970 chipset
- Standard ATX layout with USB 3.0 support
- Lowest price point of the ATX boards on this list
- Adequate for a stable gaming build rather than heavy overclocking
- Not the choice for pushing the 1100T’s overclocking limits
ASRock 990FX Extreme4
A 990FX board frequently cross-shopped against the Gigabyte GA-990FXA-UD3 in owner comparisons, offering a similar feature set from a different chipset partner.
- AM3+ socket, backward-compatible with AM3
- 990FX chipset
- ATX form factor with multi-GPU PCIe support
- Comparable feature set to the Gigabyte UD3 at similar pricing
- 990FX chipset headroom for future GPU upgrades
- Some owner comparisons rate the Gigabyte UD3 as feeling more polished overall
ASRock Fatal1ty 990FX Killer
ASRock’s gaming-branded 990FX board, cross-shopped directly against the Gigabyte GA-990FXA-UD3 by owners deciding between the two brands.
- AM3+ socket, backward-compatible with AM3
- 990FX chipset
- Gaming-oriented board branding and audio components
- 990FX chipset headroom similar to other flagship-tier boards here
- Frequently compared favorably on audio component quality
- Harder to find in good used condition than the more common Gigabyte UD3
Buying tips
- The Phenom II X6 1100T uses the AM3 socket, but AM3+ boards accept AM3 CPUs — confirm ‘AM3+’ in the listing, not just ‘AM3’, since that’s what’s realistically available today.
- These boards are all discontinued from major retail, so expect to shop used or new-old-stock through eBay-style listings rather than a current-production storefront.
- If overclocking the Black Edition’s unlocked multiplier is the goal, prioritize a 990FX board (Sabertooth, GA-990FXA-UD3, 990FX Extreme4) over a 970-chipset budget board for better VRM headroom.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.