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Protronix Series 9 Extreme Performance Thermal Compound Paste Syringe (Pack of 5)
JacobsParts

Protronix Series 9 Extreme Performance Thermal Compound Paste Syringe (Pack of 5)

Bottom line: The Protronix Series 9 Extreme Performance Thermal Compound Paste Syringe: Thermal conductivity rated above 5.15 W/m-K, 62 percent higher than Series 7; main trade-off: high-density 45 percent metal oxide paste spreads stiffer than thin low-viscosity compounds.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Thermal conductivity rated above 5.15 W/m-K, 62 percent higher than Series 7
  • ✓ Not electrically conductive, so slips near socket pins will not short the board
  • ✓ Non-curing formula lets you reseat or remove a cooler without chiseling
  • ✓ Wide -50 C to 340 C operating range covers overclocking and hot retro hardware
  • ✓ Five syringes per pack for repeat teardowns and multi-machine rebuilds

Cons

  • ✗ High-density 45 percent metal oxide paste spreads stiffer than thin low-viscosity compounds
  • ✗ No syringe capacity in grams listed, so coverage per tube is hard to plan
  • ✗ No spreader tool, gloves, or cleaning wipes included in the pack
  • ✗ Sold under JacobsParts rather than a brand with published third-party test data

Manufacturer description

The Protronix Series 9 thermal compound from JacobsParts is a high-density paste built for enthusiasts pushing CPUs, GPUs, and vintage hardware past stock thermals. Rated at greater than 5.15 W/m-K thermal conductivity with thermal resistance under 0.004 C-in squared per watt, Series 9 runs 62% more thermally conductive than the Series 7 formula it replaces. Its 45% metal oxide blend holds together across an operating range of -50 C to 340 C, so it stays stable whether you are stress-testing an overclock or reviving a retro rig that has been sitting for two decades. Because the paste is…

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SpecPicks Verdict

SpecPicks scored Protronix Series 9 Extreme Performance Thermal Compound Paste Syringe using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpu coolers & fans category. JacobsParts's retro cpu coolers & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro cpu coolers & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How thermally conductive is Protronix Series 9?

It is rated at greater than 5.15 W/m-K with thermal resistance below 0.004 C-in squared per watt, which the manufacturer states is 62% more conductive than the Series 7 formula.

Will this paste short out my motherboard if it spills?

No. Series 9 is listed as not electrically conductive, so a smear that reaches socket pins or surface components will not create a short. Still wipe up excess before powering on.

Can I use it on older retro PC hardware and not just modern CPUs?

Yes. The operating range runs from -50 C to 340 C and the formula is non-corrosive and non-curing, which suits vintage CPUs, chipset heatsinks, and aging cooler mounts.

Does the paste harden or need replacing after a cooler reseat?

It is non-curing, non-volatile, and rated for long-term stability, so it stays pliable for reseating. Apply fresh paste after each cooler removal for the best contact.

Key Features

  • The Protronix Series 9 thermal compound paste is 62% more thermally conductive than the Series 7.
  • The high density formula is suitable for extreme environments and applications that demand the very best performance.
  • Exceptional long term stability, odorless, low oil content, non-curing, non-volatile, non-corrosive, non-toxic, flame retardant, not electrically conductive
  • • Operating Temperature: -50/340℃ • Thermal Conductivity: >5.15W/m-K • Thermal Resistance: <0.004℃-in²/W
  • 45% metal oxide compounds

Full Specifications

BrandJacobsParts
SterileNon-Sterile
MaterialPlastic
Set NameProtronix Series 9 Extreme Performance Thermal Compound Paste Syringe (Pack of 5)
Unit Count5 Count
Item Volume4.5 ml
Part NumberPST-F-5PK
Model NumberPST-F-5PK

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Protronix Series 9 Extreme Performance Thermal Compound Paste Syringe (Pack of 5)
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