Status: Restarted, as I'm mightly disappointed with the "regular" build. The GPU + riser issue still applies, but workarounds should do, for now.
Update on 2024-09-20:
Got so disappointed with the regular option, that I decided to just "shove it" and return to my original plans. So back to side-mounted AIO it is.
Yeah, the GPU might be sitting around in a bit of a wonky situation, as in: probably gonna have fun with zip ties + the fan / AIO mounting bracket for the GPU back, the other side should be sitting rock solid with neodym magnets .. but at least the riser is gonna work as expected.
Future improvements may involve a HDPlex GaN 500 and the eventual move to the S400 V2, when I'm done with the "inverted classic" mod (including replacing the back panel).
Update on 2024-09-02:
Going with a "regular" 240 AIO for now, as I need a new working system ASAP.
Conclusion: 280 AIO / radiator works, but the primary issue is, that you need to figure out a solid, proper mounting AND riser solution for the GPU first. Anything else after is rather easy.
Going to look into this in a few months again, while I finish other tasks, including the S396, my new sleeper build and maybe a S400 V2 back panel mod.
Original post on May 28th:
Today, I received my fallback case (see other thread), the A4 H2O with PCIe 4 riser cable.
Did a quick test fit, and as it turns out, my be quiet Silent Loop 2 280 AIO fits almost perfectly. Had to get a bit creative with the tube routing, but it works!
The system specs are basically the same as seen in the Mesh-mATX thread.
Full image dump over at my blog: https://wp-devil.com/a4-h2o-with-280-mm-aio-part-1/
So next, I ordered the Asrock Z690 PG-ITX/TB4 board, and a Silent Wings 4 Pro 140 (soon to be two of them, but could also be replaced by SilverStone Shark Force 140 ARGB; depending on outcome of tests).
Full list of components: https://de.pcpartpicker.com/user/fwolf/saved/6zgNyc
Update on 2024-09-20:
Got so disappointed with the regular option, that I decided to just "shove it" and return to my original plans. So back to side-mounted AIO it is.
Yeah, the GPU might be sitting around in a bit of a wonky situation, as in: probably gonna have fun with zip ties + the fan / AIO mounting bracket for the GPU back, the other side should be sitting rock solid with neodym magnets .. but at least the riser is gonna work as expected.
Future improvements may involve a HDPlex GaN 500 and the eventual move to the S400 V2, when I'm done with the "inverted classic" mod (including replacing the back panel).
Update on 2024-09-02:
Going with a "regular" 240 AIO for now, as I need a new working system ASAP.
Conclusion: 280 AIO / radiator works, but the primary issue is, that you need to figure out a solid, proper mounting AND riser solution for the GPU first. Anything else after is rather easy.
Going to look into this in a few months again, while I finish other tasks, including the S396, my new sleeper build and maybe a S400 V2 back panel mod.
Original post on May 28th:
Today, I received my fallback case (see other thread), the A4 H2O with PCIe 4 riser cable.
Did a quick test fit, and as it turns out, my be quiet Silent Loop 2 280 AIO fits almost perfectly. Had to get a bit creative with the tube routing, but it works!

The system specs are basically the same as seen in the Mesh-mATX thread.
Full image dump over at my blog: https://wp-devil.com/a4-h2o-with-280-mm-aio-part-1/
So next, I ordered the Asrock Z690 PG-ITX/TB4 board, and a Silent Wings 4 Pro 140 (soon to be two of them, but could also be replaced by SilverStone Shark Force 140 ARGB; depending on outcome of tests).
Case: Dan Case A4-H2O w/ black panels
CPU: Intel i7 13700K
MB: Asrock B650E PG-ITX/TB4
Contact Frame: The original by Thermalgrizzly
RAM: 64 GB Corsair DDR5 5200 (Corsair Vengeance)
Storage: 2x 2 TB (FireCuda 530 + SK Hynix P41)
AIO: be quiet Silent Loop 2 280 w/ 2x Silent Wings 4 Pro / 2x Shark Force 140Silent Wings 4 Pro 140 + Silverstone Air Slimmer 140
PSU: Corsair SF750
GPU: Inno3D RTX 4070 Twin X2 OC White Stealth with "hidden" power connector
Riser: PCIe 4supplied with the case 20 cm 90° angle Cooler Master V2
CPU: Intel i7 13700K
MB: Asrock B650E PG-ITX/TB4
Contact Frame: The original by Thermalgrizzly
RAM: 64 GB Corsair DDR5 5200 (Corsair Vengeance)
Storage: 2x 2 TB (FireCuda 530 + SK Hynix P41)
AIO: be quiet Silent Loop 2 280 w/ 2x Silent Wings 4 Pro / 2x Shark Force 140
PSU: Corsair SF750
GPU: Inno3D RTX 4070 Twin X2 OC White Stealth with "hidden" power connector
Riser: PCIe 4
GPU: Gigabyte Radeon RX 6800 Gaming OC (for now) w/ 180° angled power adapters
Riser: PCIe 4 supplied with the case, but is being replaced with the EZ-DIY PCI riser of the same style (23 cm)
Riser: PCIe 4 supplied with the case, but is being replaced with the EZ-DIY PCI riser of the same style (23 cm)
Currently replacing one of the fans (SW 3 HS) with the Silverstone Air Slimmer 140, as this is the side with the in / outlet ports and pressing a bit too much against the tubes with the default 25 mm tall fan.
When the board arrives, the SW 4 Pro goes where the SW 4 HS 120 is installed right now (had to use this one because in the original setup inside the Meshlicious, the MB ATX cables would be squished too much, so the smaller frame of the 120 mm fan helped mitigating this issue).
When the board arrives, the SW 4 Pro goes where the SW 4 HS 120 is installed right now (had to use this one because in the original setup inside the Meshlicious, the MB ATX cables would be squished too much, so the smaller frame of the 120 mm fan helped mitigating this issue).
Full list of components: https://de.pcpartpicker.com/user/fwolf/saved/6zgNyc
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