New Mac Pro Constantly Freezing Up

Hello! I purchased a new Mac Pro from Apple in December. I have had to erase and re-install the OS 4 times in that period due to constant freezing (just completely frozen), and my computer will STILL constantly freeze up without any hardware-intensive processes occurring. Below is the log from the last crash; if anyone has any idea on how to interpret this, or understand what is going on, I would sincerely appreciate it!

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Sun Jun 19 16:01:05 2016

*** MCA Error Report ***

CPU Machine Check Architecture Error Dump (CPU: Intel(R) Xeon(R) CPU E5-1650 v2 @ 3.50GHz, CPUID: 0x306E4)

Core: 0 1

IA32_MC3_STATUS=0xBE00000000800400

IA32_MC3_CTL=0x0

IA32_MC3_ADDR=0x3F7F94702003

IA32_MC3_MISC=0x3FFFF

Core: 0

IA32_MC21_STATUS=0xFE200000000C110A

IA32_MC21_CTL=0x0

IA32_MC21_ADDR=0xCAF00000

IA32_MC21_MISC=0x20FC381600802086

Model: MacPro6,1, BootROM MP61.0116.B16, 6 processors, 6-Core Intel Xeon E5, 3.5 GHz, 64 GB, SMC 2.20f18

Graphics: AMD FirePro D500, AMD FirePro D500, PCIe, 3072 MB

Graphics: AMD FirePro D500, AMD FirePro D500, PCIe, 3072 MB

Memory Module: DIMM1, 16 GB, DDR3 ECC, 1866 MHz, 0x802C, 0x33364A534632473732505A2D314739453120

Memory Module: DIMM2, 16 GB, DDR3 ECC, 1866 MHz, 0x802C, 0x33364A534632473732505A2D314739453120

Memory Module: DIMM3, 16 GB, DDR3 ECC, 1866 MHz, 0x802C, 0x33364A534632473732505A2D314739453120

Memory Module: DIMM4, 16 GB, DDR3 ECC, 1866 MHz, 0x802C, 0x33364A534632473732505A2D314739453120

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x135), Broadcom BCM43xx 1.0 (7.15.166.24.3)

Bluetooth: Version 4.3.6f3 16238, 3 services, 18 devices, 1 incoming serial ports

Network Service: Ethernet 2, Ethernet, en1

PCI Card: AMD FirePro D500, Display Controller, Slot-1

PCI Card: AMD FirePro D500, Display Controller, Slot-2

PCI Card: pci11c1,5901, IEEE 1394 Open HCI, Thunderbolt@159,0,0

PCI Card: pci1b4b,9220, AHCI Controller, Thunderbolt@25,0,0

Serial ATA Device: APPLE SSD SM0256G, 251 GB

Serial ATA Device: LaCie 2big v2 THB USB3 Raid 1, 4 TB

Serial ATA Device: MARVELL VIRTUAL

USB Device: Hub

USB Device: BRCM20702 Hub

USB Device: Bluetooth USB Host Controller

USB Device: Keyboard Hub

USB Device: USB Receiver

USB Device: Apple Keyboard

USB Device: KeyStudio

FireWire Device: Duet, Apogee Electronics, Up to 400 Mb/sec

Thunderbolt Bus: Mac Pro, Apple Inc., 19.2

Thunderbolt Device: 2big TBT2 USB3, LaCie, 1, 22.1

Thunderbolt Bus: Mac Pro, Apple Inc., 19.2

Thunderbolt Device: Thunderbolt to FireWire Adapter, Apple Inc., 3, 5.6

Thunderbolt Bus: Mac Pro, Apple Inc., 19.2