Dell Precision M6500 memory upgrade

I am talking about 1600MHz speed ram. The laptop supports 32gb (4x8gb) for 1333MHz ram. But for 1600MHz speed it only supports up to 8gb ram. I was wondering if that can be 1 8gb module.. Did you understand my question? Mine is a quad-core.

Max is 8G/slot or 32 if you have a quad-core CPU (the four-slot system should have shipped with a quad core).

A dual-core CPU is 8G max total.

What model CPU do you have?   The CPU determines the RAM speed.

/home/milhan > sudo lshw -class processor

 *-cpu                    

      description: CPU

      product: Intel(R) Core(TM) i7 CPU       Q 740  @ 1.73GHz

      vendor: Intel Corp.

      physical id: 400

      bus info: cpu@0

      slot: Microprocessor

      size: 947MHz

      capacity: 1866MHz

      width: 64 bits

      clock: 133MHz

      capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm tpr_shadow vnmi flexpriority ept vpid dtherm ida cpufreq

      configuration: cores=4 enabledcores=4 threads=8

This CPU will not run memory at 1600 MHz -- max is 1333, so it's a moot point about DDR3-1600 support.

Even if you install DDR3-1600, it'll just downclock to 1333 MHz.

how do you determine that?

thanks for your time and help. I learned something new.