Question 1

While this work with my ASRock Z77 Extreme4 LGA 1155?

Accepted Answer

It will work provided you set the motherboard for overclocking. If you are possibly worried about damage to the system from overclocking, I would suggest getting the DDR3-1600 set. http://www.newegg.com/Product/Product.aspx?Item=N82E16820148544

Question 2

will this fit a MSI  970 GAMING AM3+ ATX Motherboard?

Accepted Answer

Yes.  Fits in DDR3 socket:  yes.  Motherboard supports:  yes.  See MSI product page; supports up to DDR3-2133.  Great performer, low latency.  XMP Profile gives the 1866.  Relatively low height fits underneath even large overhanging CPU cooler.

Question 3

Is this memeory stick compatible with an Acer Aspire X1430?

Accepted Answer

If you are curious, go to maker's website, where you can use the advisor tool.

Question 4

Do these have the led feature?

Accepted Answer

Negative, it is the Crucial Ballistix Tactical Tracer series that has the LED's

Question 5

I can not run them at 1866 Mhz, who can help me, please? My mother board is Asus Z87 Gryphon (supported 1866). I already set XMP and RAM frequency is 1866, but I got BSOD. Then I restore default, everythings seem okie, but it run at 1333.

Accepted Answer

I had this issue as well with my mother Asus Sabertooth with a AMD CPU. Asus states in their web site it will run at 1333mhz as safe precaution, when you change them to 1866 you bios is going lock up and the backup BIOS settings are put into place.

I recommended to you check with Asus website and look for a bios update to latest release available this should take care of you memory setting. Also after you update the BIOS make sure you do not use the software pre set's overclock function these will cause you system to crash.

Lastly only change the speed and let the board chose its own power. Set it to automatic.

Hope this helps

Brand	Ballistix
Series	Tactical
Model	BLT2KIT4G3D1869DT1TX0

Capacity	8GB (2 x 4GB)
Speed	DDR3 1866 (PC3 14900)
CAS Latency	CL9
Timing	9-9-9-27
Voltage	1.50V
ECC	No
Buffered/Registered	Unbuffered
Multi-channel Kit	Dual Channel Kit
Color	Yellow

Ballistix Tactical 8GB (2 x 4GB) DDR3 1866 (PC3 14900) Desktop Memory Model BLT2KIT4G3D1869DT1TX0

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Item#: N82E16820148560