In this video I'll be taking a look at the highly anticipated DeltaMate GPU water block for the Asus ROG Astral RTX 5090 from Thermal Grizzly. If you watched our Computex coverage you will have seen that Leo got a first look at the block, alongside the lowdown on how it's made from Thermal Grizzly's own Joe Robey. Today, I get to do the fun stuff and install this beast of a water block on the RTX 5090 Asus ROG Astral and take it for a spin.
Timestamps
00:00 The DeltaMate and Pricing
02:00 The Incredible backplate! / dummy plate
03:56 PCIe Bracket / PCB Removal
05:30 Copper Coldplate / Up Close
07:00 Asus ROG Astral RTX 5090
07:33 New Deltamate Fittings
08:55 Getting some ‘stock’ results
09:41 Installing the deltamate block
11:36 DeltaMate results!
Specification
- Dimensions (L x W x H): 282 x 135 x 28mm
- Weight: 2142g
- Port Spacing: 28mm
- Port Threads: 2 x Female G1/4″ (1/4″ BSPP)
- Backplate Thickness: 4.5mm
- Number of PCIe Slots: 1.5
- Coolant Capacity: 76ml
- Cold Plate Material: Copper
- Coldplate Design: 86 x 0.2mm Micro Fins
- Terminal Material: Brass
- Exterior Material: Aluminium (6082)
- O-Ring: EPDM
- Lighting: D-RGB 3-pin 27 diodes
Thermal Grizzly unveiled the DeltaMate GPU block for RTX 5090 Asus ROG Astral at Computex this year. We got our hands on the very same block that was on show at Computex, installed it on the Asus ROG Astral RTX 5090 and ran some thermal load tests and checked out the performance in 3DMark Speed Way.




This is still a pre-release version of the block, so these are early performance figures. However, we are assured by Thermal Grizzly that this version of the DeltaMate waterblock is identical in terms of specification and manufacturing process as the retail version. You can check the progress of the final retail version availability via the blog on the official Thermal Grizzly website.
KitGuru says: If you have an Asus ROG Astral RTX 5090 and want to squeeze a little more performance from it or think it's time to delve into serious overclocking, then this waterblock could be ideal for you!