Highly Ultimate Voltage (UHV)

Highly Ultimate Voltage (UHV) is the ninth electric tier in GregTech: New Horizons. It unlocks Bioprocessors, Infinity Ingots, and Draconic Evolution. The overall goal is the construction of the Mothership and Shuttle Rocket to reach the Amun-Ra system, which is required to get your foot through the door of UEV. In UHV, many previously optional processing chains and multiblocks become necessary for progression.

This is the last regular rocket upgrade. Tier 8 plate ingots need two UHV energy hatches in the assembly line. The rocket unlocks multiple exoplanets. There is no new dungeon, the Shuttle Rocket schematic can be crafted using a schematic from a Pluto dungeon.

• T Ceti E is required for seaweed, which is used for the new circuit line. A few stacks might be needed to extract the culture.
• Barnarda C is the only source of Unknown Liquid before UEV, and the trees are needed to manufacture Xenoxene.
• Vega B has Infinity Catalyst as a small ore, although meteors are an alternative that is available slightly earlier.
• Barnarda F has Bedrockium as a small ore. While not strictly required, it is a good source for the required large-scale production.

Awakened Draconium can be found as a small ore on four of the new planets, including Vega B and Barnarda F. Tartarite (used to produce Celestial Tungsten plasma) can be found on Barnarda C and Alpha Centauri Bb.

Infinity Ingots are crafted in the Dire Crafting Table. Infinity Catalyst has two crafting recipes, the sane option uses the Neutronium Compressor. Besides the new catalyst, this also increases the demand for Diamonds, Nether Stars, and Cosmic Neutronium massively.

Infinity Ingots are used in a large range of quality of life improvements like overclocking the PCB Factory, unlimited energy for AE2, a wireless cross-dimensional AE2 terminal, an infinite oxygen tank and more. They are also used to make the Neutron Collector, an Avaritia block that, when combined with World Accelerators, can supply Cosmic Neutronium before the Space Elevator is able to mine it.

Infinity is required in moderate quantities for various UHV tasks, but gets used in large quantities starting in UEV.

Bio circuits are the UHV circuit line, going from ZPM to UEV, and are required for many advanced machines in UHV and almost everything in UEV. Just like Wetware circuits, they rely heavily on the Bacterial Vat and use the Assembly Line for UHV and above circuits. The Bio Lab is again required to produce the cultures used in the Bacterial Vat recipes, although these cultures are much slower and have much lower rates than those used for Wetware, encouraging the player to parallelize across multiple Bio Labs to obtain them more quickly.

Similar to Raw Growth Catalyst Medium, there are three recipes for Raw Bio Catalyst Medium. Generally, the best one is the one that uses tiny piles of Infinity Catalyst Dust; it is cheaper on materials and faster than the Tritanium Dust recipe, but avoids the difficult-to-automate loop in the Biocells recipe. Bio Catalyst also requires Seaweed Extract, which is made using another Bacterial Vat recipe for Seaweed Broth, and requires Unknown Liquid pumped from Barnarda C. The culture for this recipe is initially made using Seaweed harvested from T Ceti E, which can be used to make more seaweed for more cultures if needed.

Similar to Wetware circuits, the many slow machines required to produce Bio circuits leads most players to only use them for UEV circuits, where they are required, and stick with lower tier circuits for everything from ZPM to UHV.

Xenoxene is a new fluid that is produced in the Bacterial Vat using Oil, Osmium, and Antimony Trioxide, and is required for both the new Optical SMDs and for the final plastic in the game, Radox Polymer. Obtaining the cultures for Xenoxene is infamously difficult, requiring many different slow and low-chance recipes in sequence, and since multiple cultures are needed to run enough Bacterial Vats to obtain enough Xenoxene for lategame, many players opt to passive said cultures.

Radox is made by combining Barnarda C Wood and Xenoxene in an Industrial Coke Oven, and processing the produced Raw Radox through the Dangote Distillus or Mega Distillation Tower and the Mega Oil Cracker. The Radox Gas made through this process is combined with Oxygen and Titanium Plasma in a Mega Chemical Reactor to make Radox Polymer itself, but another output, Super Heavy Radox, is also needed in late UEV for Dimensionally Shifted Superfluid, a lategame Lubricant replacement.

Radox itself is not required until the Mothership, although it could be used as the best PCB Factory plastic. It gains more uses later on, such as crafting Naquadah Fuel Mk-V, and millions will be needed before the line can be skipped with a tier 4 Quantum Force Transformer in UMV.

Rugged Botmium casings, the final casing tier, are required to produce Mutated Living Solder, a replacement for Molten Indalloy 140 in soldering that is used for circuits starting at Bio, components starting at UEV, and many other lategame recipes.

Quantum Anomalies can be made in the Cyclotron. They require two consecutive low-probability steps to succeed, but do not get consumed in many applications. The quest book requires them for Botmium casings, but Molten Advanced Nitinol can alternatively be produced from Advanced Nitinol Plasma from a fusion reactor.

The Mothership is the end of UHV progression, being required to reach Tier 9 planets and obtain Tengam, the magnetic material in UEV through UMV motors. Creating a Mothership requires launching a Shuttle Rocket while holding the necessary blocks and items, similar to a space station. The Shuttle Rocket's schematic is not found in a dungeon like previous schematics, but is instead crafted in the Assembly Line. Once the Mothership is built, engines must be placed on it and provided with fuel to travel to the Amun-Ra system, which contains the six Tier 9 planets; the only relevant to unlock UEV is Seth, which contains Tengam, as the Space Elevator is a better source of everything else on these planets. A small amount of dilithium from Neper is useful early in UEV. The Space Elevator can be used to travel to them, but only after obtaining MK-III motors, which require the DTPF. The Mothership also requires many previously optional steps in progression, such as the Nano Forge, Radox, and Kevlar.

The only viable power sources in UHV are Plasma and Naquadah Fuel.

The Tier 8 Rocket provides access to Tartarite, meaning Celestial Tungsten Plasma, the best plasma fuel in the game, is available. Plasma also benefits from new rotor materials, such as Infinity Catalyst or Infinity, that significantly improve the amount of power that can be produced from a single turbine. Compact Fusion Reactors become much more affordable in UHV as well, making Plasma significantly easier to scale.

Naquadah Fuel gains access to the Naquadah Fuel Refinery once Bio Circuits are made. This multiblock is used to produce all tiers of Naquadah Fuel above Mk2, each of which is a significant upgrade over its predecessor. Naq3 provides over 4x the EU/t when compared to Naq2, at the cost of somewhat more Heavy Naquadah Fuel and some additives; it can also be doubled by using the Chromatic Glass recipe, but this requires large amounts of Hyper-Intensity Laser Engravers to support. Naq4 is also possible to make in UHV, if either Nano Resin, Meteors, Depleted Thorium Fuel, or the High Temperature Gas-Cooled Reactor are used to source the Praseodymium.

The UHV Capacitor is a major upgrade to power storage, providing effectively unlimited EU capacity and removing issues with the EU buffer size being too small to last through large crafts. This does mean that power production is likely to run 24/7, so players need to ensure their power and resource production can handle this. It also unlocks wireless EU between LSCs, but this is not advisable in UHV: any LSC with a UHV capacitor on wireless mode can only safely sustain 10B EU/t of output, significantly less than many multiblocks are likely to consume.

The Electric Implosion Compressor works similar to the Implosion Compressor, but uses a small amount of energy instead of TNT, in addition to having faster recipes and support for TecTech energy hatches. While not strictly required, this should be built before the Tier 8 rocket.

The UHV Component Assembly Line (CoAL) is very useful due to how often UHV components are used, particularly for UHV superconductors in Bio Mainframes, Compact Fusion Reactor Mk4s, and new multiblocks like the Integrated Ore Factory. Its extremely high Cosmic Neutronium cost makes it very difficult to afford prior to the Mk2 Space Elevator Mining Module, although sufficient investment into Meteors can also be used. Players who have not made any Component Assembly Lines yet should make one in UHV.

The Integrated Ore Factory is a large-scale ore processing multiblock that is unlocked with UEV circuits. It is able to process thousands of ores per second, and can do every step of ore processing in one machine, making it much faster, more scalable, and more performant than previous ore processing setups. Even with these benefits, it can often struggle to keep up with high-tier Space Elevator mining modules, requiring parallelization, overclocking with 2, 8, or even 32 energy hatches, or both. The IOF should be the only ore processor in lategame bases.

Compact Fusion Reactors (Compacts) are advanced versions of Fusion Reactors that condense 64 regular Fusion Reactors worth of throughput into a single multiblock with the cost of 48 Fusion Reactors of their tier. Although Compacts are available as early as LuV, UHV is where regular Fusion Reactors become largely obsolete due to how much the demand for fusion products increases.

The Mk4 Fusion Reactor is available in UHV, although it is not necessary for any recipes until UEV. Its primary advantage over previous tiers of Fusion Reactor is speed: unlike Mk2 or Mk3 Fusion Reactors, Mk4+ Fusion Reactors get 4/4 overclocks on recipes below their tier. This is still much slower than a Compact Mk3 when using the regular Mk4 Fusion Reactor, but the Compact Mk4 is a massive speed upgrade, ranging from 8 to 21 times as fast as a Compact Mk3 depending on the recipe tier.

The new recipes unlocked, other than a faster recipe for Molten Californium, are all for new materials: Fermium and Neptunium are used for the QFT, Rhugnor is mostly used for Hypogen, Hypogen is better produced through a loop in the DTPF, Metastable Oganesson is used for the Mk5 Fusion Reactor, Technetium Plasma is used in the Space Elevator, Bromine Plasma processes Europium and Americium combs, and Flerovium has almost no uses until UMV.

The Mk-II space mining module is much more powerful than Mk-I, providing a significant speed improvement and access to many more asteroids with important materials. Most notably, it is an immensely better source of Cosmic Neutronium and Infinity Catalyst than anything available prior, and the only viable source for the quantities needed in UEV. It requires UEV circuits and at least Mk-II motors for the Space Elevator.

The Space Assembler is used to craft certain items that cannot be made in conventional assemblers. Its most notable uses are for Optical Circuits in UEV, but it can be used to craft some quality of life upgrades in UHV, most notably the Advanced Stocking Input Hatch.

The Infinite Fluid Drilling Rig is the best source of pumpable fluids available until the Space Elevator Pumping Module in UEV. It is much faster than the finite Fluid Drilling Rigs, and has no risk of running out; pumping fluids like Oxygen, Nitrogen, and Fluorine with the Infinite Fluid Drilling Rig can effectively replace existing methods of obtaining those fluids. Like many other infrastructure upgrades in UHV, it is unlocked with UEV circuits.

Infinity Ingots can be used to unlock various Creative items, providing major improvements in quality of life. Most of them are made in the Dire Crafting Table.

• The Infinity Booster Card can be combined with an AE2 Wireless Terminal to allow it to work at any distance and across dimensions.
• The Infinite Oxygen Supply provides unlimited oxygen while in space, useful for travelling on your Mothership.
• The Neutronium Energy Cell provides infinite energy to an AE2 network, and variants exist to integrate it into an ME Controller or Cable Anchor. In addition to simplifying logistics, the Neutronium Energy Cell reduces lag caused by propagating power across networks, and so should be a priority upgrade.
• The Magical Memory provides 65 MB of RAM when placed in an OpenComputers device, and is also used later to craft the Dyson Swarm Ground Unit.
• The Blood Orb of Armok provides infinite LP to a Soul Network.
• The Akashic Records give large amounts of Thaumcraft research points.
• The Crystal Studded Cosmic Neutronium Wand is a wand with unlimited vis.
• The Infinity Egg gives lots of altar power to a Witchery Altar, and improves the Dragonblood recipe in the DEFC.
• The Asgardandelion and Everlasting Guilty Mana Pool both produce infinite Botania mana, one as a flower and one directly in a Mana Pool. The Creative Mana Tablet provides infinite mana to a player's inventory.

The Draconic Evolution Fusion Crafter (DEFC) is a multiblock used to craft Draconic Evolution components, in addition to unlocking many better Dragonblood recipes that do not consume Dragon Eggs. It is not required until the Stargate, but makes many quality of life enhancements available before that. Crafting the DEFC requires completing Thaumcraft, Blood Magic, and Botania, making it effectively the endpoint of magic progression. It also needs a Draconic Core Schematic to be able to run its initial recipes, which can be found on Pluto or obtained from a Space Elevator Mining Module Mk3 in UIV.

UHV contains the first of four old Stargate quests in the Quest Book. These quests are entirely optional, and require submitting the materials needed to make two stargates in an older version of GTNH in order to complete the quest and receive a trophy. Each quest also provides context about the features available and the history of the Stargate during its version. The UHV old Stargate, also known as the Stargate of Split Origin, corresponds to version 2.1.0.0. Although it is the cheapest of the four old Stargates, it is still incredibly expensive by the standards of UHV. Among other ingredients, it requires 625 Eternal Singularities, 41k Bio Mainframes, 233k Infinity, 5.3M UHV Superconductor, and 2.1M Tritanium. As a result, it is best done in later tiers.