Rosewill 4U Server Chassis Case|Supports up to 4 GPUs|8 Hot-Swap 3.5"/2.5" SATA/SAS up to 12Gbps|E-ATX Compatible|3x 12038 Hot-Swap Fans,2 Rear 8038 Fans|USB 3.2 Type-C|With Rail Kit-RSV-AI01

The Rosewill RSV-AI01 specs say a 145mm max CPU cooler height when not using the GPU bracket. My Arctic Freezer 4U-M is 145mm high exactly, but it doesn't come close to fitting due to a critical design flaw on this case. In order to provide the 11 PCI-E slot outlets, the PSU is placed on a little shelf above the motherboard. For an SSI-EEB motherboard, this puts the PSU almost directly above the CPU, severely limiting cooling options in order to stay under the low shelf. Basically, you have to liquid cool. Now, where to place the radiator? There are no mounting holes anywhere to be seen, and because of the 8 hot swap drive bays, there's little room to work with. In fact, one is tempted to place the radiator in the space an expansion card would go on those extra PCI-E slots! Clearly this design was not thought through. The marketing photos did not make this clear to me, and I wonder if it was an intentional deceit. The only real way to run this case would be to do custom watercooling with a 2U radiator placed above the drive bays. Or drill your own radiator mounting holes into the hot swap fan enclosure. Or place the radiator in the extra PCI-E slots which were the raison d'etre of the case to begin with. UPDATE I ended up moving to water cooling, and twist-tying the radiator to the hotswap fans. Meanwhile, the power button on the case was defective, so I can only start the thing by using the reset button as a power switch. Given that you're forced into water cooling, the case ends not being deep enough. Now my PSU cables are obstructing the airflow enough that I'm getting warnings from my network card which doesn't have its own active cooling. I'm basically planning on moving this system to a Sliger case with 28" depth when I get the chance. Anyway, you get what you pay for, but sometimes not even that.

Fits an Asrock Rack X570D4U, Ryzen 9 5950x + Thermalright Peerless Assassin cooler and a 5090 FE perfectly. Plenty of room for longer PCIe cards, but there really is not enough enough room for power connectors on graphic cards. You will need some right angle adapters on larger cards if the power connector is not already at an angle, like it is on the RTX 50 Series Founders Edition/Pro RTX 6000 cards. There is a support bar that goes across the center, but this was easily removed for space. Included fans are not PWM, but are quiet and functional. Requires two 4-pin molex power connectors for each of the drive bays and the rear fan (7 total), but could get away with a couple of splitters if using SSD's instead of power hungry HDD's. The drive bay power connectors are wired parallel and feed all of the drives (so two 4-pin molex in parallel will feed four drives).

My Rosewill 4U chassis arrived with shipping damage to the drive cage and side panel. I contacted support, provided photos, and they offered a free return. Since the damage was repairable with basic tools, I asked about partial compensation instead. They offered 20% refund, which I accepted. I was able to straighten the brackets and fix the dent myself, and now the chassis works perfectly. Rosewill handled this professionally, and the chassis itself is solid once repaired. Recommendation: If you're handy and get a damaged unit, they're reasonable about compensation. Their cases are great for homelab builds.

I already bought 4 cases from Rosewill. I bought in past the R4000u, L4500, Z2700 and the L4412. Rosewill made great product. The RSV-R4200 is great. I got enough room for an ATX motherboard and multiple HDD.

I've built two of these so far and have been very happy with the layout and space. The hard drive caddies are pretty cheap and brittle (one arrived damaged for me, seller said I'd have to send the entire case back for exchange so I dealt with it on my own). But you're not normally fiddling with those pieces a lot, and the rest of the case is rock solid. Would buy again, happy overall.