gigabyte b250m d2v or msi b250m Bazooka

It depends on your needs and what current parts you have or planned parts you wish to buy:

If you have/need 4 RAM sticks, then get the MSI. If you have/need only 2 RAM sticks, then get the Gigabyte.
If you need to use HDMI on-board graphics, get the MSI. If you need to use D-Sub on-board graphics, get the Gigabyte.
If you have/need an M.2 SSD, then get the MSI. If you don't need/have an M.2 SSD, then get the Gigabyte.
If you need an additional case fan header, get the MSI (with 2x). If you only need 1 case fan header, get the Gigabyte.
If you don't need an S/PDIF Out for audio, get the MSI. If you need an S/PDIF Out for audio, get the Gigabyte.
If you need a Parallel Port, get the MSI. If you don't need a Parallel Port, get the Gigabyte.
If you control the LED strips via MB (using Mystic Light Sync), get the MSI. If you control LED strips other way, get the Gigabyte.
If you need only 3x USB3.0 Type-A rear ports, get the MSI. If you need more USB3.0 Type-A rear ports, get the Gigabyte (with 4x).
If you need a USB3.0 Type-C rear port, get the MSI. If you don't need the Type-C rear port, get the Gigabyte.

Note also that the MSI is bigger at 244mm x 228mm, while the Gigabyte is smaller at 226mm x 174mm. So check the cable routing (grommet holes) and space clearances/appearance in your chosen chassis.
 


Hi
I Need 2x4gb ram sticks
Im going to use HDMI
Not using SSD
Don't need additional fan headers
- What's S/PDIF?
- What's a Parallel Port?
Not using led strips
I'll check the sizes

I guess Gigabyte would be better?
 


Also my case is the Zalman z9 Neo
 


I wouldn't say the Gigabyte is "better", but, I would say the Gigabyte "fits your needs" based on the motherboard's feature compared with the MSI.

If your answers I quoted above is definite and you have no plans to upgrade in the future (such as using M.2 SSDs or going for 4x4gb RAM sticks or needing LED or Fan headers), then, between the 2 boards, the Gigabyte is enough for you.

The next question would be, at what prices will you buy the MSI or the Gigabyte motherboards. Depending on where you will purchase it, the MSI B250M Bazooka is around $85 while the Gigabyte B250M D2V is around $66. Are you willing to pay for $20-ish more for upgradability, additional features, and subjective looks? In the same way, are you willing to save $20-ish for the lack of the other features you might not need today but need in the future?

Your Zalman z9 Neo chassis is an ATX case (that fits up to ATX-sized MB) and will be big enough whichever of the 2 micro-ATX MB you select. Both the MSI and the Gigabyte are micro-ATX-sized (smaller than ATX). I mentioned that the MSI is bigger at 244mm x 228mm, while the Gigabyte is smaller at 226mm x 174mm. Here is what it looks like when fitted inside your case:

The 244mm x 228mm mATX MB (actual MSI B250m Bazooka inside the Zalman z9 Neo). Source: http://pcpartpicker.com/b/Vh6XsY
185527.b18db4aa9ba95924f517b3004bae5761.1600.jpg


The 226mm x 174mm mATX MB (similarly-sized MB only but different Gigabyte model inside the Zalman z9 Neo). Source: http://pcpartpicker.com/b/p6vV3C
183072.5a5815708ae97f15091e812d242b6ab5.1600.jpg


Notice that in the second photo using a similarly-sized 226mm x 174mm motherboard as the Gigabyte B250M D2V, the large cut-out behind the motherboard tray will be very much visible (enough for large cables to pass through - defeating the purpose of the rubber grommets for a cleaner look). So you might want to take this visual comparison into consideration if it will be aesthetically pleasing to you.



S/PDIF is commonly known as "Optical Out" used for digital audio transmissions.
You use this cable...
1024px-TOS_LINK_clear_cable.jpg

...and connect it to this S/PDIF socket (marked "Optical")
C2_imagevih.jpg


Parallel Port is usually used for the good 'ol Printers prior to the advent of USBs.
A motherboard that supports a parallel port will have this set of pins (i.e., headers, marked "LPT1") in your motherboard...
asrock_q1900m_3.jpg

...used to connect this separately-purchased parallel port expansion cable/module...
ws25-0020f_01.jpg

...for you to connect the old printer cables into.
cable-parallel-printer.jpg
 


I'd like to go with the bazooka but can you install ddr4 2133 into the ddr4 2400 slots on the msi board?
 


Yes you can. The mb supports up to 2400MHz (max.), meaning, 2133MHz DDR4 will also work.

From their website: https://www.msi.com/Motherboard/B250M-BAZOOKA.html#productSpecification-section
Main Memory

• 4 x DDR4 memory slots, support up to 64GB
- 7th Gen processors support DDR4 2400/ 2133 MHz
- 6th Gen processors support DDR4 2133 MHz
• Dual channel memory architecture
• Supports Intel® Extreme Memory Profile (XMP)
 

Thanks very much for your help :)