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

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).

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 bought this to convert my desktop home lab to be able to fit into a rack in my AV closet. It functioned fine. The instructions were useless but you need to know how to build a PC anyways to use this. The tolerances on the 3.5/2.5 drive bays was meh and the tolerance on the disk drive 5.25” if I recall SUCKED. I had a one for extra USBs and a standard disc drive and they both had a super hard time going in. Plus the quality of the cages were abysmal. Everything related to the two cages was held in by flimsy metal brackets. As for the motherboard and main PC components they fit fine. I was using an ATX board with a GTX 1080 and that meant I couldn’t use 4 of the drive slots in their cage which sucks. It’s not too difficult to get into the case to remove stuff but it’s a very very tight fit. By the time I was done it was pretty heavy, the weight had to be over 30 lbs so be careful. It fits standard into a rack and was easy to remove to modify. It’s a decent case, but you’re getting what you pay for. I had to go in with a cutter and pliers to get everything to fit well.

I was looking for some cases for a budget server rack build. I ran across this one. Fit the design, and made by a manufacturer I was familiar with (unlike other manufacturers that just string a bunch of nonsense letters together). Case was decent enough. A couple of quibbles. 1) The cross bar is highly unusable if you are using anything substantial for a CPU cooler. But, it is removable, and doesn't seem to provide any real benefit anyway. I realize this is for GPU bracing, but really, you don't want / need this anyway for that purpose. 2) The intake filter is not easy to get to and kind of defeats the purpose of serviceability. To get this thin, under performing filter out of there to service, you have to literally take the fan bracket out of the case. This is not easy feat. Not sure why no one thought this a problem during design. I personally removed it completely to ensure good airflow anyway. The filter restricts a lot of it. 3) The handles don't seem very strong. Personally, I wouldn't allow the full weight of a built server to be suspended from these handles for any length of time. They likely will crack or break completely. They are good for sliding the case forward for rack removal though. 4) Case came with pre-installed MB standoffs. If you want to thread in more, this becomes an issue. I bought 5 of these cases. And, on each and every one, the extra standoffs (for full ATX installation), were not threaded at all. Which means you have to carefully thread in the standoffs into the unthreaded holes slowly, so they create a thread in the (thankfully) soft aluminum. This works, but geez, why aren't the holes pre-threaded? All in all, good budget rack mount case when money is tight. Just be aware of the pitfalls.

I love this 9B case, but it has a few issues. The first is the case only has room for one front 120mm fan. This is fine if you have 5 drives since that air intake is blowing directly on the drives. But once you add two more for max capacity you can see the 2 drives will run much hotter, almost 10c difference fwiw. Since the front panel USB is in the center this cabling gets in the way of the right most drive and you can’t mount the HHD cage. HHD cage says it mounts 3.5” but it’s a bit of a lie. Yes it mounts, but you can see you can only attach the front 2 screws since the back screw holes are about not lining up with the cage. It’s almost as if the engineers forgot that the screw mounts for the bottom of the drive are if you bottom mount. But when you vertical mount you must use an adapter (like in the 15b version) or you need to adjust you screw holes to the proper side width. This is fine but I knocked a star off because of this. I intend to 3d print some spacers to hold the drives in place. I would have like to see the usb on the bottom center rather than the middle or to the far right or left like other cases they have made. And allow for another 120mm fan or 80mm fan. I may DIY something later to get some air flowing on the other two drives. I get that this is meant to have a security feature for the front. But come on, the key is a bit of a joke. I would prefer an optional knob for home lab. The case can likely support 3-4 more HHDs in the 5.25 bay. Plenty of room to run two stacked and one likely under the two stacked. You maybe able to modify the case to support 4 or even 5 stacked. But you need to be sure to run air over them. Even if it’s super low speed. Even with all this, I still recommend the case if you don’t have a lot of depth. I am keeping it at 4 stars but it really should be 3 stars for used quality. This had screws stripped on the case. Clearly used. But since it’s cosmetic and it will not be seen I’m fine with it. The weight of the case with nothing in it is very lightweight compared to my 15b version. I really like this case but it needs a few more tweaks. If the vendor wants to reach out to me I’m more than willing to give some criticism on some other aspects of the case. I honestly think this case can be a multi versatile case with many options. It’s a perfect depth for some media cabinets and a lot of home lab users would flock to this with some tweaks.