We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Grey thermal putty in a 20 g syringe-style container

UPSIREN

UPSIREN UX PRO Ultra 16.8 W/m·K Thermal Putty 20 g

SKU CH-GSP6-EERK9

High-conductivity thermal putty replaces pads up to 3 mm thick with 16.8 W/m·K performance

  • Net content20g
  • Continuous-use temperature-50 to 200 °C

Weight 50 g

  • Thermal conductivity of 16.8 W/m·K for rapid heat transfer
  • Replaces thermal pads up to 3 mm thick with a single compound
  • Non-electrically conductive formula prevents short-circuit risk
  • Operates continuously from -50 °C to 200 °C
  • No oil bleeding or pump-out for long-term reliability

High-Conductivity Thermal Putty for GPU and Memory

UPSIREN UX PRO Ultra is a gummy thermal compound rated at 16.8 W/m·K conductivity, supplied in a 20 g syringe. It targets enthusiasts replacing factory thermal pads on graphics cards, memory modules or similar components where a conformable, high-performance interface material is required.

Replaces Pads Up to 3 mm Without Electrical Risk

The putty fills gaps up to 3 mm thick, eliminating the need to stock multiple pad thicknesses. Its non-electrically conductive formula prevents short circuits if it spreads beyond the die, and the tacky texture holds position during heatsink installation without curing time.

Operates From -50 °C to 200 °C With No Oil Bleed

Long-term stability is rated from minus 50 °C to 200 °C, with short-term tolerance to 250 °C. The fully cured, non-bleeding compound maintains contact pressure over years, but the single 20 g portion limits coverage to a few GPU or memory arrays rather than large-scale builds.

How it compares

Measured against everything we stock in Thermal Paste, at today’s prices. Recalculated every night.

Price $37.99
Pricier than about 90% of the 498 comparable items (median $12.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

Size & build
Net content20g
Environment & compliance
Continuous-use temperature-50 to 200 °C

Other versions of this model

2 more in the same range

Questions about this item

How thick a gap can the 16.8 W/m·K putty fill while still conducting heat?

The putty replaces soft thermal pads up to 3 mm thick, so it bridges gaps that pads of that thickness would cover.

What temperature does the putty reach inside a GPU running all day?

Long-term operating range is -50 to 200 °C; the material itself withstands heating to 250 °C without degrading.

What must already be in place for the putty to work on a graphics card?

A heatsink or cold plate that presses down on the GPU die and memory chips so the tacky putty makes full contact.

More in Thermal Paste

Similar items