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Components & Replacement Parts · Head to head

SanDisk 128GB Ultra microSDXC card + vs ARCTIC MX-4 (4 g) - Premium: Which Should You Buy?

Two PC-drawer heroes face off: SanDisk's 128GB microSD versus ARCTIC's legendary thermal paste.

SanDisk 128GB Ultra microSDXC card + SD adapter up to 140 MB/s with A1 App Performance UHS-I Class 10 U1 - Twin Pack SanDisk

SanDisk 128GB Ultra microSDXC card + SD adapter

4.6 / 5 175,046 reviews
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ARCTIC MX-4 (4 g) - Premium Performance Thermal Paste for all processors (CPU, GPU - PC, PS4, XBOX), very high thermal conduc ARCTIC

ARCTIC MX-4 (4 g) - Premium Performance Thermal

4.7 / 5 104,402 reviews
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Side by side

SanDisk 128GB Ultra microSDXC card +ARCTIC MX-4 (4 g) - Premium
PriceSee on Amazon →See on Amazon →
Rating★★★★★ 4.6★★★★★ 4.7
Review count175,046104,402
BrandSanDiskARCTIC
Highlights
  • Ideal for Android smartphones and tablets; SanDisk Ultra microSDHC and microSDXC UHS-I card cards are compatib…
  • Capture and Store Even More Hours of Full HD Video; With capacities of up to 1TB, you can store even more hour…
  • Transfer Speeds of up to 150MB/s; Blazing transfer speeds mean that your content moves fast, letting you trans…
  • CONSISTENT QUALITY: Our thermal paste packaging design has evolved over time, but the formula has remained the…
  • EXCELLENT PERFORMANCE: ARCTIC MX-4 thermal paste is made of carbon microparticles, guaranteeing extremely high…
  • SAFE APPLICATION: The MX-4 is metal-free and non-electrical conductive which eliminates any risks of causing s…

Our verdict

Strictly speaking, these solve completely different problems, which makes the choice refreshingly easy. The SanDisk Ultra is a 128GB microSD card with up to 140MB/s transfers and A1 app performance, ideal for phones, tablets and dash cams. The ARCTIC MX-4 is 4g of carbon-based, non-conductive thermal paste, the safe choice for repasting a CPU or GPU because it cannot short anything out, and it costs a small fraction of the card. Both are wildly popular, with 175,046 and 104,402 reviews respectively, and the ARCTIC edges the rating at 4.7 versus 4.6. Buy whichever matches the job, or honestly, both.

Which one is for you?

Prices are pulled live from Amazon.

Prices move around, so always confirm on Amazon before deciding. Browse more options in Components & Replacement Parts or see the whole Computers & Accessories department. New to the category? Start with our buying guide.