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

SanDisk 128GB Ultra microSDXC card + SD adapter

★ 4.6 / 5 175,046 reviews

£39.99 at time of writing

Check price on Amazon →

ARCTIC

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

★ 4.7 / 5 104,402 reviews

£5.49 at time of writing

Check price on Amazon →

Side by side

	SanDisk 128GB Ultra microSDXC card +	ARCTIC MX-4 (4 g) - Premium
Price	£39.99	£5.49
Rating	★★★★★ 4.6	★★★★★ 4.7
Review count	175,046	104,402
Brand	SanDisk	ARCTIC
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 for £39.99, ideal for phones, tablets and dash cams. The ARCTIC MX-4 is 4g of carbon-based, non-conductive thermal paste at £5.49, the safe choice for repasting a CPU or GPU because it cannot short anything out. 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?

Buy the SanDisk Ultra microSD if your phone, tablet or camera is gasping for storage space. Read our full look at the SanDisk 128GB Ultra microSDXC card + →
Buy the ARCTIC MX-4 if a hot, noisy computer needs its CPU or GPU repasted safely. Read our full look at the ARCTIC MX-4 (4 g) - Premium →

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.