For reference, my
current build.
The EKWB 3080 FE water blocks just came available for preorder so I grabbed one. I'm still trying to get a 3080 FE for my build, so I have a month or so to get a 3080 and plan how I'm going to fit it.
The 3080 FE water block is the easy part. It's really short - EKWB lists the length as 205mm - but I want to add a reservoir in the extra space while I'm at it. The S1 allows 316mm for the GPU which gives me just over 100mm of space to work with.
To that end, I have also ordered a Swiftech MCRES Micro Rev 2. The MCRES is 103mm if you leave the mounting tabs on it, but since I have nothing to attach them to I will probably be filing them off leaving me with the main body that is only 76mm long. (See measurement diagram below.)
So, 205mm + 76mm == 281 mm in total length, leaving 35mm free space, but the complications come in when you try to plumb it all together.
The FE water block will come with 2 terminals - both have the in/out ports at the back end of the card where the FE PCBs have the V shaped cutout. One terminal will have the ports mounted in the typical direction - facing the front of the card, i.e. facing the Ghost side panel. The other terminal will have the ports mounted facing the rear of the card, i.e. towards the Ghost front panel and the empty space where I want to put a reservoir.
The FE block will be 29mm thick which doesn't leave much room for fittings installed in front-facing ports to clear the side panel. The space for the GPU is only just over 51mm wide and I don't know if that counts the space between the back of the GPU and the backbone of the case. The Koolance low profile connectors that I'm using for my current build with the 2080Ti block are just under 20mm from the face that they mount into so this would just squeak by, but the gotcha with the Koolance fittings is that the exit port is flush with the surface so I may not be able to use them if the lip of the terminal is too wide. Also, they don't leave a lot of clearance in my current build and the 2080Ti block seems a lot thinner than the 3080 block (I can't find a spec for the 2080 Ti block to compare with, though).
Alternatively, using a straight out fitting on the rear-facing terminal gives plenty of room for tube routing if you ignore the reservoir I want to put in that space. If I mount the reservoir flush against the front panel, then I have about 35mm between the two ideally (it remains to be seen if the 205mm length that EKWB quotes includes the rear bracket or not). That would be a tight fit for a straight through connection between the two. Also, only one of the connections would go straight into the reservoir, the other connections on the reservoir and GPU would have to angle off to different destinations all within that 35mm space. Not even 2 Koolance low profile connectors could sit end to end there.
Potentially I could offset them so that the straight through path would connect top port on one to the bottom port on the other, allowing the other ports to get the full 35mm gap to vector off somewhere else. I'd have to diagram that out to see if the routing looks nice or just makeshift. I'm also hoping to reclaim the space under the PSU for a fan and so the offset positioning would likely have the reservoir encroaching on that space. I'm assuming that the GPU ports are intended to be used as intake on top with outlet on bottom. I know that most GPU blocks run within a degree or so in reverse, but the 3080 block is kind of weird so I'm not sure I want to buck the design intent there. Similarly the reservoir ports seem to be similarly designed, assuming that the lowest port is best used as an outlet to put it as far from the air pocket as it can get. This means that I'm likely to have to offset the reservoir downwards so that its intake lines up with the GPU's outlet.
The MCRES does have other ports - 2 on the side that would face the GPU. One on the bottom that they typically show holding a temperature sensor. And one on the top that is typically indicated as a fill port. That tasking of the ports makes sense for the four ports so I don't see trying to get fancy with alternate routing, though I currently have my temp sensor in an extra port on the radiator so I haven't decided if I'm going to swap it to the reservoir.
Main questions I have:
- Is 35mm too short to connect port to port in a straight through fashion?
- Is there another reservoir to consider for that location that might be slimmer and have a wider port spacing?
- Is a reservoir under the radiator considered a bit odd?
- Reservoir should usually go right before the pump, but I don't think I have the space for that here. Is Rad/Pump/CPU/GPU/Res/Rad a reasonable order?
- I could probably also consider Rad/Pump/CPU/Res/GPU/Rad.
- Rad/Res/Pump/CPU/GPU/Rad would have a lot of tubes coming and going in the narrow space between GPU and Reservoir and I'm not sure I can offset them enough to avoid collisions.
Block diagram of MCRES for reference: