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A few things to note. Any temperature below 80c is to be considered very cool, VRM temps only start to become a concern when they exceed 90c, and even then there's still 10-20c worth of headroom before most boards will thermal throttle. Below 80c is very safe and will never present an issue, so all X670 boards are well within safe limits. Still, if you were to use PCIe 5.0 devices this configuration would make the most sense, as both delivers would receive x8 PCIe 5.0 bandwidth which is 32 GB/s. In comparison the Asus ROG Strix X670E-F Gaming connects its secondary PCIe x16 slot chipset, which is a lot cheaper to wire in, but does limit you to PCIe 4.0 x4 bandwidth (8 GB/s). For recording temperatures we're using a digital thermometer with K-Type thermocouples and we'll be reporting the peak rear PCB temperature. Finally, we're not reporting Delta-T over Ambient, instead I maintain a room temperature of 21 degrees and to ensure a consistent ambient temperature a thermocouple is positioned next to the test system. For some reason Gigabyte spent their PCIe 5.0 budget on the M.2 drives, limiting the PCIe slot support to a single x16 slot. So while we guess four PCIe 5.0 M.2 slots is nice, we'd rather have the flexibility of having more PCIe slots.
Essentially both boards have the same amount of PCIe bandwidth, the Carbon can just better spread that bandwidth across multiple slots while almost 90% of the PCIe bandwidth of the F Gaming is eaten up by the primary PCIe 5.0 x16 slot. The best high-end X670E motherboard is simply the MSI MEG X670E ACE. The stupid expensive Asus ROG Crosshair X670E Extreme and MSI MEG X670E Godlike are excellent motherboards, but we can't justify the asking prices, especially in the case of the Godlike. Of course, it is an X670 Extreme board so you get PCIe 5.0 for the primary PCIe slot, which is nice, there's also a second PCIe 5.0 M.2 slot and the VRM has been upgraded with 105A powerstages from the 60A models used by the Elite AX but really that's going to be of benefit for very few people.These are great news to share: there are no bad X670/X670E motherboards. Surely prices might be a bit hard to swallow, but there are no duds, and that's a rare thing when reviewing an entire motherboard series. We hope you found this useful and expect a similar piece covering B650 motherboards. Shopping Shortcuts:
The ROG Strix X670E-I Gaming is an impressive ITX board, using ten 110A power stages for the vcore it ran very cool and although it features active cooling it was always silent in our testing. Admittedly, we tested it under the same conditions as all the other boards, so in a cramped ITX case it will likely run a bit hotter, but we're confident it's up to the task.And well, the good news is you don't have to worry about VRM thermals with X670 boards, not even a little. In the past, we've seen boards that should perform well fail miserably in this testing, but that's not the case here... It's an extreme motherboard as well, the 16 teamed 110A powerstage vcore VRM is no joke, there's two PCIe 5.0 M.2 slots, USB4 support, loads of USB ports, onboard buttons, debug LED codes, 2.5 Gbit LAN and WiFi 6, it's an impressive but also ultra expensive mATX motherboard. In the same price range, the Asus ROG Strix X670E-I Gaming WiFi wins the award for the best X670E Mini-ITX motherboard by default, as it's the only one as does the Asus ROG Crosshair X670E Gene for the best and only Micro-ATX motherboard.
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