Is Corsair better than Razer?

It depends on the product category. Corsair keyboards (K70, K100) are generally better built than Razer equivalents. Razer mice (DeathAdder, Viper) are generally better than Corsair mice. Corsair headsets (Virtuoso) offer better audio quality. Razer has stronger brand recognition among younger gamers. Corsair's iCUE ecosystem is more comprehensive than Razer Synapse. Neither is universally better — each has strengths in different categories.

Do I need to buy all Corsair to use iCUE?

No. iCUE works with any combination of Corsair products — you do not need a full Corsair setup. However, the RGB synchronization and unified control benefits increase with more Corsair products. A Corsair keyboard with a Razer mouse works fine — you just control them from separate software. If unified RGB and control matter to you, going all-Corsair eliminates the need for multiple software platforms.

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