The answer here depends on the specific model of server being used. I was holding off until the OP could describe the actual server being used, as the SSD options vary.
Read through the descriptions of HP's SSD portfolio for detailed information on the different classes of drive.
For instance, with a G6 or G7 ProLiant, all SSD performance will be controller-limited. SATA SSDs will downshift to 3Gbps speeds, and the controller will max out at ~20,000 IOPS. However, many third-party SAS SSDs will be incompatible, with the exception of the HP SAS SSDs. The HP Enterprise SAS SSDs are OEM by Sandisk/Pliant, and aren't terribly good performers. They have deep I/O queues and require a certain I/O profile to really perform well. They have great endurance, though.
With a Gen8 ProLiant, third party SSDs (like the Samsung) are not an option. They will at best, trigger a POST alert (Error 1709), or at worst, won't be recognized or cause temperature sensor issues. The non-enterprise SSD offerings by HP are either Intel, Samsung or STEC (MachIOPS) OEM. The Enterprise are Sandisk. All have HP firmware and are authenticated for use with Gen8 systems.
The specific drive you're curious about (691862-B21) is an Intel or Samsung drive. It's a read-optimized disk that's good for caching duties, but a low-performing write SSD. I've had clients return these as they were disappointed at the performance profile and that their array of spinning disks was more capable from a throughput perspective.
Please also see: Third-party SSD solutions in ProLiant Gen8 servers