{"rewrite":{"id":"r_e3552774d1cb0391e90ef37a","clusterId":"c_e53ad45da0372fa68ab081e3","slug":"carbice-ice-pad-runs-4-8-c-hotter-than-thermal-paste-in-ltt-labs-test","model":"deepseek-v4-flash","headline":"Carbice Ice Pad Runs 4-8°C Hotter Than Thermal Paste in LTT Labs Test","summary":"LTT Labs tested Carbice's Ice Pad, a carbon nanotube thermal pad, against Noctua NT-H2 thermal paste and PTM7950 phase-change pad on a Ryzen 9 9950X3D. Under air and liquid cooling, the Ice Pad ran 4-8°C hotter than both alternatives in most tests, though Carbice claims long-term performance improves with thermal cycling.","whyItMatters":"The test shows that while CNT-based pads offer convenience and no pump-out risk, they currently underperform traditional thermal interface materials in short-term CPU cooling.","webCardHtml":"\u003cp\u003eCarbice\u0026#39;s Ice Pad, a thermal pad using carbon nanotubes grown on an aluminum substrate, was put through CPU temperature testing by LTT Labs. The pad relies on a polymer layer that conforms under heat and pressure to improve contact, but in practice it lagged behind both standard thermal paste and a phase-change pad. With a Ryzen 9 9950X3D under air cooling and an OCCT load, the Ice Pad hit 75°C while Noctua NT-H2 and PTM7950 both reached 69°C. Under liquid cooling with the same load, the gap widened to 81°C versus 69°C and 68°C respectively. LTT Labs noted the pad requires an activation period of several minutes at 33-37°C before it reaches its intended performance, and even after reactivation it remained 4°C hotter than the alternatives. Carbice argues the pad\u0026#39;s advantage is long-term stability, since it does not pump out or dry like paste, but the short-term test found all three materials provided sufficient cooling.\u003c/p\u003e","blueskyPost":"Carbice Ice Pad runs 4-8°C hotter than thermal paste on a Ryzen 9 9950X3D. The carbon nanotube material may need thermal cycling to reach its claimed performance, which is not typical for consumer builds.","twitterPost":"Carbice Ice Pad runs 4-8°C hotter than thermal paste. Claimed long-term gains require thermal cycling, an uncommon condition in consumer PCs.","threadsPost":"Carbice Ice Pad underperforms thermal paste by 4-8°C on a Ryzen 9 9950X3D in LTT Labs testing. Carbice says the pad improves with thermal cycling, but that process is not standard in typical consumer use. The material's promise may only show in industrial or server settings where cycling occurs naturally.","newsletterBlurb":"LTT Labs tested Carbice's carbon nanotube Ice Pad against standard thermal paste and a phase-change pad. The Ice Pad ran 4-8°C hotter in most CPU cooling tests, though Carbice claims its long-term stability and lack of pump-out are advantages that short-term testing cannot capture.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20260625-carbice-carbon-nanotube-cpu-cooling/\",\"title\":\"How effective is the 'Carbice Ice Pad,' a thermal pad using carbon nanotubes, at cooling a CPU?\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4345,"outputTokens":647,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1782597633,"createdAt":"2026-06-27T21:52:44.000Z","publishedAt":"2026-06-27T21:55:24.000Z","updatedAt":"2026-06-27T21:55:24.000Z"},"cluster":{"id":"c_e53ad45da0372fa68ab081e3","canonicalTitle":"カーボンナノチューブ採用サーマルパッド「Carbice Ice Pad」はどれぐらいCPUを冷やす効果があるのか？","representativeArticleId":"a_6dacd0991bd4c8c00f51c0ae","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[],\"type\":\"review\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-06-25T14:00:00.000Z","lastSeenAt":"2026-06-25T14:00:00.000Z","updatedAt":"2026-06-27T21:55:24.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20260625-carbice-carbon-nanotube-cpu-cooling/","title":"カーボンナノチューブ採用サーマルパッド「Carbice Ice Pad」はどれぐらいCPUを冷やす効果があるのか？"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":[],"type":"review","domain":"other","is_roundup":false},"keyFacts":["LTT Labs tested Carbice's Ice Pad, a carbon nanotube thermal pad, against Noctua NT-H2 thermal paste and PTM7950 phase-change pad on a Ryzen 9 9950X3D.","Under air cooling with an OCCT load, the Ice Pad hit 75°C while both Noctua NT-H2 and PTM7950 reached 69°C.","Under liquid cooling with the same load, the Ice Pad reached 81°C versus 69°C for Noctua NT-H2 and 68°C for PTM7950.","The Ice Pad requires an activation period of several minutes at 33-37°C before reaching intended performance, and even after reactivation it remained 4°C hotter than the alternatives.","Carbice claims the Ice Pad's advantage is long-term stability, as it does not pump out or dry like paste, but the short-term test found all three materials provided sufficient cooling."]}