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Why is this Kingston Memory incompatible with ASUS motherboard?

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April 15, 2013 7:02:03 PM

I purchased an ASUS P8Z77-V LK motherboard [0]. It supports 4×240pin DDR3 2400(O.C.)/2200(O.C.)/2133(O.C.)/2000(O.C.)/1866(O.C.)/1800(O.C.)/1600/1333 memory, so I purchased two Kingston 8GB 240-Pin DDR3 SDRAM ECC Registered DDR3 1600 Server Memory DR x4 Model KVR16R11D4/8. [1]

I thought that memory would be compatible because it's 240-pin (same as the motherboard), and speed is DDR3 1600.

When I built the thing, the system would not boot and the motherboard was beeping the error code for "No memory detected". I tried to solve the issue by pressing the MemOK button which went through a number of different configurations automatically, but it still ended up with the DRAM_LED light on and the "no memory detected" beep.

I also tried booting with just a single stick of memory, then with the other stick, and with the sticks in different slots, to no avail.

I've ordered two sticks of Corsair memory now (CMZ8GX3M1A1600C10(XMP)) [2], from the asus.com's qualified vendor list for that specific motherboard [3].

I expect the new memory to work, but my question is this -- why didn't my first memory work?


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[0] http://www.newegg.com/Product/Product.aspx?Item=N82E168...
[1] http://www.newegg.com/Product/Product.aspx?Item=N82E168...
[2] http://www.amazon.com/gp/product/B005T63BJM/ref=oh_deta...
[3] http://dlcdnet.asus.com/pub/ASUS/mb/LGA1155/P8Z77-V_LE/...
a c 478 V Motherboard
a c 90 } Memory
April 15, 2013 7:09:17 PM

Some mb today can use ecc ram. (retail). You have to closely read there memory spec. The z77 chipset is a cheaper copy of the c line on intel server chipset. Most new z and older chipset look for non ecc ram.
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a b V Motherboard
a b } Memory
April 15, 2013 7:10:42 PM

It doesn´t work because it is a registered memory module -- your motherboard needs a unbuffered ECC memory module.
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April 15, 2013 7:44:06 PM

Reading the ASUS product page http://www.asus.com/Motherboards/P8Z77V_LK/#specificati... the motherboard does not support ECC ram.

quote:
4 x DIMM, Max. 32GB, DDR3 2400(O.C.)/2200(O.C.)/2133(O.C.)/2000(O.C.)/1866(O.C.)/1800(O.C.)/1600/1333 MHz Non-ECC, Un-buffered Memory


This is fairly normal for a consumer board. ECC or Error Correcting Code ram is normally a server/high end workstation product. It normally is more expensive than the equivlent consumer product as it has special chips to detect bit errors (usually some kind of CRC). This requires a specific chipset logic, which is not normally present in the consumer chipsets (although the northbridge is now integrated these days, so it is not normally present in the consumer CPU).
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April 15, 2013 7:57:19 PM

Thanks for the information. I'll know what to look for, next time.
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