Adding a third 8 GB ram stick to 2X4 ram

[dragoee]

Hi, planning to upgrade my PC and adding a third 8 GB ram stick, I now have a 2x4 kit in the 2+4 slots,(the first slot is blocked).
Is it possible? and if it is, can I put it in the third slot?

My PC specs:
Mainboard : MSI Z97 GAMING 3 (MS-7918)
Chipset : Intel Haswell
Processor : Intel Core i5 4690 @ 3500 MHz
Physical Memory : 8192 MB (2 x 4096 DDR3-SDRAM )
Video Card : NVIDIA GeForce GTX 970
Hard Disk : KINGSTON SV300S37A120G SCSI Disk Device (120GB)
Hard Disk : Western Digital WD10EZEX-60M2NA0 SCSI Disk Device (1000GB)
Hard Disk : Seagate Expansion (500GB)
DVD-Rom Drive : HL-DT-ST DVDRAM GH24NSC0
Monitor Type : Philips Philips 226V4 - 22 inches
Network Card : Attansic (Now owned by Atheros) Killer E2200 Gigabit Ethernet Controller
Operating System : Windows 7 Home Premium Home Edition Media Center 6.01.7601 Service Pack 1 (64-bit)
DirectX : Version 11.00
Windows Performance Index : 7.6 on 7.9

General Information :
ChannelA-DIMM1 (BANK 1 ) : 4096 MB - DIMM
ChannelB-DIMM1 (BANK 3 ) : 4096 MB - DIMM

Information SPD EEPROM-
Manufacturer : GEIL
Part Number : CL9-9-9 D3
Serial Number : 0018E908
Specification : H
Type : DDR3-SDRAM PC3-12
Format : UDIMM (133.35 x
Size : 4096 MB (1 ranks
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) :
Module XMP : Yes
Module XMP 2.0 : No
Width : 64-bit
Error Correction Capabil
Voltage : 1.50v
Prefetch Buffer : 8-bit
Manufacture : Week 51 of 2012

Supported Frequencies :
CAS Latency (tCL) : 5 clocks @ 444.9445 MHz
RAS to CAS (tRCD) : 5 clocks @ 444.9445 MHz
RAS Precharge (tRP) : 5 clocks @ 444.9445 M
Cycle Time (tRAS) : 16 clocks @ 444.9445 MH
Min TRC : 21 clocks @ 444.9445 MHz, 25 cloc

 

[J_E_D_70]

Might, might not - that’s why it’s best to use matched sets.

If it does work, all your ram will go into single channel mode and you’ll have a 5% or so memory performance loss.