Akasa

Akasa AK-450 Silver Compound 450

Expert rating6 / 10

Material:: Silver-Based Thermal Compound
Thermal Conductivity:: 9.24 W/mK
Recommended Use:: Mainstream CPU/GPU

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Manufacturer: Akasa Last updated: 2026-10-08

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Akasa AK-450 Silver Compound 450 Review

Akasa AK-450 Silver Compound 450 is Akasa's silver-based thermal paste, rated 9.24 W/mK and sold in a 5g syringe.

We'd call AK-450 a reasonable mid-tier paste with thin documentation. Akasa publishes a 9.24 W/mK rating, a 0 to 200C operating range and a "non-flowing" viscosity, and claims low bleed and temperature stability. It does not publish a test method, a thermal resistance figure or any electrical data, so the conductivity number is hard to compare against pastes like Thermalright TF7 that print more. It is a clear step up from Akasa's own ceramic AK-455, rated above 2.4 W/mK. Pick it for a normal CPU repaste; skip it for sub-zero cooling, where the 0C floor rules it out.

Thermal Performance and Conductivity

Akasa rates AK-450 at 9.24 W/mK. The product page names no test method and gives no thermal resistance figure, so we treat it as a marketing-level number rather than a datasheet value.

On paper that puts it well above Akasa's ceramic AK-455 (rated above 2.4 W/mK) and below Thermalright TF7 at 12.8 W/mK. For a mainstream CPU under an air cooler, that tier is plenty.

Compound Type and Composition

Akasa sells this as Silver Compound 450, a grey silver-based compound it describes as having "high thermal conductivity, low bleed and temperature stability". It does not publish the filler breakdown, the carrier oil or a density figure, so the weight-to-volume conversion in the 5g syringe is unknown.

Application and Consistency

Akasa lists the viscosity only as "non-flowing", which means it holds its shape rather than running. Our listing records a spreader in the box, so a thin spread or a centered dot both work. A 5g syringe is far more than one CPU application, so this is a tube that lasts through several builds.

Electrical Safety

Akasa's page says nothing about electrical conductivity or resistivity. With a silver-based filler and no published figure, we recommend keeping it off exposed SMD components around the die and wiping away any overflow before mounting. If you need a documented insulator, Arctic MX-6 publishes a volume resistivity of 1.8 x 10^12 ohm-cm.

Longevity and Pump-Out Resistance

Akasa claims low bleed and temperature stability across 0 to 200C, but publishes no reapplication interval and no pump-out test. The 0C lower limit is unusual: most pastes in our catalog are rated well below freezing, so AK-450 is not a candidate for chillers or sub-ambient setups.

Comparison to Alternatives

Against Akasa AK-455, AK-450 is the obvious upgrade if you are already buying Akasa. Against Thermalright TF7 (12.8 W/mK) and ID-Cooling Frost X25 (10.5 W/mK, with density and viscosity published), the competitors document more. Against Arctic MX-6, you trade a published W/mK number for published electrical and lifespan data.

We'd buy AK-450 when it is the cheaper option on the shelf, not as a first choice.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating6 / 10

A silver-based compound with a solid published conductivity figure and a bundled spreader, reasonable for the price.

Best for

Mainstream CPU repastes under air or AIO coolers
Akasa AK-455 owners wanting a higher-rated Akasa compound
Builders who want a larger 5g syringe for several applications

Not for

Sub-zero or chiller cooling, since Akasa rates it from 0C
Buyers who need published electrical safety data
Delidded direct-die or liquid-metal-tier overclocking

Specifications

What these specs mean

Identity and form

Brand	Akasa
Model	AK-450-5G
Material Class	Silver-based thermal compound

Thermal performance

Conductivity Source	https://www.akasa.co.uk/update.php?tpl=product/product.detail.tpl&model=AK-450-5G

Electrical and board risk

Paste Segment	Standard Paste

Application

Applicator Included	Spatula

Operating envelope

Min Operating Temperature	0 C
Max Operating Temperature	200 C

Thermal Conductivity	9.24 W/mK
Package Size	5g syringe
Recommended Use	Mainstream CPU/GPU (formulated for CPU/heatsink interfaces)

FAQs

Is Akasa AK-450 electrically conductive?

Akasa does not publish electrical conductivity or resistivity for AK-450. Because it is silver-based and undocumented, we recommend treating it with care around exposed components and cleaning any squeeze-out before you mount the cooler.

How is AK-450 different from Akasa AK-455?

AK-450 is Akasa's silver-based compound rated 9.24 W/mK in a 5g syringe. AK-455 is a ceramic compound rated above 2.4 W/mK, sold in 1.5g and 5g syringes. AK-450 is the higher-performance option on paper.

Can I use AK-450 for sub-zero or chiller cooling?

No. Akasa rates its operating range at 0 to 200C, so it is not specified for temperatures below freezing. Pick a paste rated well below 0C for sub-ambient setups.

Does AK-450 need a curing or break-in period?

Akasa does not publish any curing or burn-in requirement for AK-450. We have no source saying it needs one.

What does "non-flowing" viscosity mean for application?

It means the paste holds its shape rather than running, which makes it easy to place a dot or line without it sliding off the heatspreader. Mounting pressure does the rest.