Single SSD is Faster. A single SSD or a RAID 0 HDD setup, which is faster? This is probably the biggest question that most computer enthusiasts are wondering about. After quite a bit of research, I kept finding that the single SSD drive was quite a bit faster than the HDD raid 0 setup. Most benchmarks I found had the single SSD being somewhere around 25-50% faster than the RAID 0 HDDs.