Samsung's 970 EVO is a more budget-oriented sibling to the 970 Pro we reviewed last week, which left us thoroughly impressed. Unlike the 970 Pro, the 970 EVO uses more economical TLC, which also means that write speeds will be lower. To mask this effect (that any TLC drive has), Samsung has chosen to enable pseudo-SLC caching on the 970 EVO. While sequential read speeds and random-access read IOPS both match those of the 970 Pro, probably because both use the same controller, write speeds are lower with 1.7 GB/s instead of 2.4 GB/s. Random IOPS are cut in half, but still deliver a decent 180,000 IOPS.