Memory Clock Speeds?

VDrakonV

Reputable
Nov 7, 2014
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4,530
Hey guys, I built a computer back at the the 27th of December and ordered this two of this RAM: http://www.amazon.co.uk/Corsair-CMV4GX3M1A, as you can see it says 1600MHz, however when I go on to speccy it says it's 801MHz: "8.00GB Single-Channel DDR3 @ 801MHz (11-11-11-30)", I am confused as it said 1600MHz and I am a little worried something is wrong, this is the RAM section supporting the 801MHz on Speccy:
RAM
Memory slots
Total memory slots 4
Used memory slots 2
Free memory slots 2
Memory
Type DDR3
Size 8192 MBytes
Channels # Single
DRAM Frequency 801.5 MHz
CAS# Latency (CL) 11 clocks
RAS# to CAS# Delay (tRCD) 11 clocks
RAS# Precharge (tRP) 11 clocks
Cycle Time (tRAS) 30 clocks
Bank Cycle Time (tRC) 39 clocks
Physical Memory
Memory Usage 37 %
Total Physical 8.00 GB
Available Physical 5.01 GB
Total Virtual 18 GB
Available Virtual 14 GB
SPD
Number Of SPD Modules 2
Slot #1
Type DDR3
Size 4096 MBytes
Manufacturer Corsair
Max Bandwidth PC3-12800 (800 MHz)
Part Number CMV4GX3M1A1600C11
Week/year 07 / 14
Timing table
Frequency CAS# Latency RAS# To CAS# RAS# Precharge tRAS tRC Voltage
JEDEC #1 444.4 MHz 6.0 6 6 17 22 1.500 V
JEDEC #2 518.5 MHz 7.0 7 7 20 25 1.500 V
JEDEC #3 666.7 MHz 9.0 9 9 25 33 1.500 V
JEDEC #4 800.0 MHz 11.0 11 11 30 39 1.500 V
Slot #2
Type DDR3
Size 4096 MBytes
Manufacturer Corsair
Max Bandwidth PC3-12800 (800 MHz)
Part Number CMV4GX3M1A1600C11
Week/year 07 / 14
Timing table
Frequency CAS# Latency RAS# To CAS# RAS# Precharge tRAS tRC Voltage
JEDEC #1 444.4 MHz 6.0 6 6 17 22 1.500 V
JEDEC #2 518.5 MHz 7.0 7 7 20 25 1.500 V
JEDEC #3 666.7 MHz 9.0 9 9 25 33 1.500 V
JEDEC #4 800.0 MHz 11.0 11 11 30 39 1.500 V


Any help is appreciated, Thank you!
 
Solution
Memory is double data rate, not to be confused with dual channel which is different. With one module, it will only run in single channel but that has nothing to do with the data rate. 800mhz X2 is 1600mhz. It's fine.

If you're still in doubt, go into the BIOS and make sure the RAM is currently configured for 1600mhz operation manually. Some memory will default to lower values, but it looks like yours is configured properly.
Memory is double data rate, not to be confused with dual channel which is different. With one module, it will only run in single channel but that has nothing to do with the data rate. 800mhz X2 is 1600mhz. It's fine.

If you're still in doubt, go into the BIOS and make sure the RAM is currently configured for 1600mhz operation manually. Some memory will default to lower values, but it looks like yours is configured properly.
 
Solution
Speccy and many other similar programs show the frequency of the clock being supplied to the memory. The memory being Double Data Rate will operate at twice the memory clock frequency.

In this case - memory clock frequency is 801 MHz, therefore the memory operates at 2 x 801 MHz = 1602 MHz.

Your memory appears to be operating at about the correct frequency.