Looking for a compatible motherboard for Intel Arc B580.

Honestly, after messing around with the first-gen Alchemist cards, I can tell you that Re-Size BAR is LITERALLY the most important factor for Intel's drivers. Battlemage is gonna be the same story. Since youre looking at an Intel Core i5-13600K, you definitely dont need to blow $300 on a high-end board, but you gotta be careful with the VRMs on cheaper B760s because that chip pulls a lot of power under load.

I mean, I had some issues with the super budget boards throttling the 13600K, which is just annoying. For a mid-range build under $200, I would suggest looking at the MSI MAG B760 Tomahawk WiFi or the ASUS ROG Strix B760-A Gaming WiFi D4. Both handle Resizable BAR perfectly in the BIOS and have enough power phases so your CPU wont downclock during gaming sessions.

About the PCIe version... the B580 is almost certainly gonna be PCIe 4.0. While Z790 boards often offer PCIe 5.0 slots, it actually wont make a tangible difference for this specific GPU tier. Youre not gonna saturate a 4.0 x16 slot anyway. Basically, a solid B760 is plenty as long as it has a decent thermal design. Just make sure to update to the latest BIOS immediately cuz Intel is still tweaking their microcode for stability lately... it is kinda a mess tbh. If you really want a Z790 for the overclocking headroom, the ASRock Z790 Pro RS is usually right at that $170-$190 mark and works great tho. gl with the build!!

Seconding the recommendation above! Honestly, looking at the market right now, the MSI MAG B760 Tomahawk WiFi is like the sweet spot for value and performance for a 13600K build. It's usually under $200 and handles Re-Size BAR perfectly.

Another solid choice would be the ASRock B760 Pro RS if you wanna save even more cash for the GPU itself. Seriously, basically any B760 will do the trick as long as it has decent VRMs, so dont feel like you gotta overspend on Z790 unless you REALLY want to overclock. gl!

Basically, dont skimp on the Re-Size BAR support cuz Battlemage will literally crawl without it... Honestly a B760 is fine, but make sure it has solid VRMs for that 13600K tho.

This^ Also wanted to add that the PCIe version isn't actually a dealbreaker. I'm running an Intel card on an older Gen 4 slot and the performance hit is basically margin of error, so don't sweat that part.

Totally agree about the B760 boards though. I went with a mid-range B-series for my current setup to save some cash, and it's been rock solid. Here's what I learned:

* Re-Size BAR is easy to toggle in the BIOS, just look for "Above 4G Decoding".
* VRM quality matters more than the chipset for a 13600K.
* Drivers have actually gotten way better lately.

Honestly, I spent way under $200 on my board and it works perfectly with the Intel software. Just make sure the BIOS is updated right away and you'll be fine. It’s mostly about that Re-Size BAR setting... literally nothing else matters as much! gl

Adding my two cents here... I remember back when Re-Size BAR first dropped, I slapped a new card into an older board thinking it would just "work" and it was a total stutter-fest. Safety first, right?

Quick question though - are you planning on overclocking that 13600K or just running it at stock? And what is your case airflow like? I ask because that CPU can pull serious power, and on a budget board, VRM temps can get sketchy if you don't have enough airflow.

If you're keeping things stock, a high-quality B760 is actually plenty. Just make sure the power delivery is beefy enough to handle the 13600K's boost spikes. I would suggest looking at:

* MSI MAG B760 Tomahawk WiFi - Super solid power phases and very reliable BIOS support for Intel Arc cards.
* ASUS TUF Gaming Z790-Plus WiFi - If you can find a sale, this is safer for long-term stability with that i5.

Lesson learned over the years: don't just look at the chipset features. For a build like this, VRM cooling is literally the most important safety factor for your hardware's lifespan. Hope that helps!