Truecrypt, created volumes slow down the hard one, what could be the matter?

Question

TrueCrypt

The hard drive worked a couple of days ago normally, read / write speed, load, etc. created a couple of volumes of 5 GB each, and the hard drive immediately began to slow down, Windows takes longer to load, the red indicator on the case does not go out almost, and almost during any operation associated with the hard drive, the load is high , used to create, the hard one also slowed down, then demolished the volumes and worked normally, all this even if the volumes are not connected but just lie, now there is no other hard one at hand to throw off the volumes and check without them, throwing out information from them is also not an option, can tc thus affect the hard ? Or still look for a different reason?

information about hard

WDC WD10EZEX-08M2NA0 ATA Device
Изготовитель Western Digital
Головок 16
Цилиндров 121 601
Дорожек 31 008 255
Секторов 1 953 520 065
Тип SATA SATA-III 6.0 Гбит/с
Тип устройства Несъёмный
Стандарт ATA ACS2
Серийный номер WD-WCC3FLYXD0SP
Версия прошивки 01.01A01
Размер LBA 48-бит LBA
Включений 1916 раз
Время наработки 579,7 дн.
Скорость 7200 об/мин
Возможности S.M.A.R.T., NCQ
Макс. режим передачи SATA III 6.0Gb/s
Режим передачи SATA III 6.0Gb/s
Интерфейс SATA
Ёмкость 931 GB
Истинный объём 1 000 204 886 016 байт
Тип RAID Нет
S.M.A.R.T
Состояние Хорошо
Температура 33 °C

some more information

8 озу
AMD Athlon X4 750K
FM2A75M-DGS
Win7(64)

there is still a suspicion that the phone modem affects all this, it is almost always on, without it the PC turns on faster, but still not so fast, but again it all started after creating tc volumes from similar
ones . tc'em hard

Answer 1

Since the specified processor does not support the AES-NI instructions used for hardware acceleration of tc (in any case, veracrypt uses them), then, most likely, the performance of the system rests not on the hard, but on the processor.