I bought a pair of second-hand DDR-3 sticks to go alongside my two existing RAM sticks, but I get blue screens within a minute or two when I use them together, even though they have the same basic specs. However, the computer runs fine when either pair is installed without the other pair. What have I got wrong?
I have a problem with my motherboard which means that memtest86+ freezes two seconds after starting a scan, however it was able to identify the RAM in both cases and confirm that the basic specs (4GB per stick, 1600 MHz, 9-9-9-24) were the same.
memtest86+ names the RAM as "DDR3-1600 A-DATA DDR3 1600G XMP" (the new memory) and "DDR3-1600 Crucial BLS4G3D1609DS1S00 XMP" (my existing memory) respectively.
The motherboard is an ASUS Sabertooth 990FX (1st generation). I have not enabled overclocking in any way.
There is something anomalous about the actual speeds reported. Memtest86+ reports the Crucial memory as running at 652 MHz (DDR3 1305) — a lot less than its nominal speed. But the Crucial memory it reports as running at 783 MHz (DDR3-1566).
I also looked at both pairs of memory separately in CPU-Z. It reports 9-9-9-24, but there are discrepancies with other numbers. The A-DATA memory it says is running at 668.9 MHz, whereas the Crucial memory it reports as running at 802.7 MHz, which is close to the nominal speed. (When I have run CPU-Z in the past, it has always reported speeds for the Crucial memory of between 800 and 803 MHz.
There is also a discrepancy, according to CPU-Z with the Bank Cycle Time. For the A-DATA memory it is 33 clocks, whereas for the Crucial memory it is 37 clocks.
So what have I got wrong? Why won't the memory work together? How can I make sure that next time I get memory which is compatible with my existing memory?
I have a problem with my motherboard which means that memtest86+ freezes two seconds after starting a scan, however it was able to identify the RAM in both cases and confirm that the basic specs (4GB per stick, 1600 MHz, 9-9-9-24) were the same.
memtest86+ names the RAM as "DDR3-1600 A-DATA DDR3 1600G XMP" (the new memory) and "DDR3-1600 Crucial BLS4G3D1609DS1S00 XMP" (my existing memory) respectively.
The motherboard is an ASUS Sabertooth 990FX (1st generation). I have not enabled overclocking in any way.
There is something anomalous about the actual speeds reported. Memtest86+ reports the Crucial memory as running at 652 MHz (DDR3 1305) — a lot less than its nominal speed. But the Crucial memory it reports as running at 783 MHz (DDR3-1566).
I also looked at both pairs of memory separately in CPU-Z. It reports 9-9-9-24, but there are discrepancies with other numbers. The A-DATA memory it says is running at 668.9 MHz, whereas the Crucial memory it reports as running at 802.7 MHz, which is close to the nominal speed. (When I have run CPU-Z in the past, it has always reported speeds for the Crucial memory of between 800 and 803 MHz.
There is also a discrepancy, according to CPU-Z with the Bank Cycle Time. For the A-DATA memory it is 33 clocks, whereas for the Crucial memory it is 37 clocks.
So what have I got wrong? Why won't the memory work together? How can I make sure that next time I get memory which is compatible with my existing memory?