Interface card type integrated in build network cards, type tower top model. Sound integrated Realtek HD ALC221. Hard disk type Intel C612. Drives: Internal (2) 3.5 IN; EXTERNAL (2) 2.5 INX 1 SLIM 0DD, CAPACITY/DRIVE 1 TB 7200 RPM SATA, SPEED PROCESSOR 16 GB2133 MHZ DDR4, FREQUENCY/INPUT 50/60 HZ, VOLTAGE/INPUT POWER SUPPLY925 W 90 PCT EFFICIENT, ACTIVE PFC, ELECTRICAL RATING 220 V,FFT:OPTICAL STORAGE: SLIM SATA DVD -ROM; SLIM SATA SUPERMULTI DVDWRITER; SLIM SATA BLU-RAYWRITER; DISPLAY TYPE HP Z DISPLAY Z24I24-INCH IPS LED BACKLIT MONITOR APPLICATION: DCS WORK STATION, MNFR PART NO: UNK, MODEL/MACHINE NO: Z640, TESTCERTIFICATE COMMENTS: ALL MANDATORY CERTIFICATE REQUIRED – 4 pcs