Hi, i have an MSI B85M-G43 motherboard with a HyperX Fury 1x8GB DDR3 1600MHz single-channel and when i look at Piriform Speccy it says that its running at 799MHz. Is this ok or is it running at low rate, i have looked at different threads and all were saying that its notmal with a dual-channel RAM but as i have a single-channel im not quite sure.
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Memory clock speed running at 799MHz not 1600MHz
- Thread starter maxwell1
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Solution
photonboy
Titan
- Jun 20, 2006
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Yep.
While it is called a "1600MHz" stick that value is based on it being in a Dual Channel setup with two or four sticks.
One stick is 800MHz. Two sticks run individually at 800MHz but effectively it's the same as a single stick at 1600MHz.
While it is called a "1600MHz" stick that value is based on it being in a Dual Channel setup with two or four sticks.
One stick is 800MHz. Two sticks run individually at 800MHz but effectively it's the same as a single stick at 1600MHz.
n0ns3ns3
Illustrious
- May 25, 2016
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^ that's entirely incorrect.
single vs multi channel is not related to memory sticks. It's memory controller feature that can use multiple sticks in parallel. It is same principle as RAID.
the Double Rate is due to ability to transmit two bits on the single clock.
https://en.wikipedia.org/wiki/DDR_SDRAM
single vs multi channel is not related to memory sticks. It's memory controller feature that can use multiple sticks in parallel. It is same principle as RAID.
the Double Rate is due to ability to transmit two bits on the single clock.
https://en.wikipedia.org/wiki/DDR_SDRAM
photonboy
Titan
- Jun 20, 2006
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Let me attempt to clear up the confusion.
First, I don't know what having memory chips on both sides has to do with the topic. It's NOT related to the "double" in any way. There are two types of doubling that I am referring to here:
#1 - memory stick IO frequency vs DDR (DDR being the use of the rise and fall of each pulse)
#2 - Dual Channel (simply splitting memory between two sticks thus 2x the bandwidth)
I am talking about the frequency to the stick unit itself to explain why the stick was shown as 799MHz.
You are talking about DDR which is an internal process. It's the same as talking about the base frequency provided by a single crystal oscillator, but then inside a chip it has another oscillator to multiply the base clock further. Like a 4GHz CPU because Base 100MHz x Multipler 40 = 4000MHz.
http://frankdenneman.nl/2015/02/19/memory-deep-dive-memory-subsystem-bandwidth/
Look where it says "DDR3-1600" and it says the IO bus clock is 800MHz.
http://www.hardwaresecrets.com/everything-you-need-to-know-about-ddr-ddr2-and-ddr3-memories/
"the memories will be accessed at 400 MHz (800 MHz DDR)"
So both 800MHz and 1600MHz is correct, but only when used to describe the correct process.
(and of course this has nothing to do with Dual Channel.)
*So I'm guessing SPECCY, CPU-Z and others are reporting the IO frequency, not the DDR frequency. I'm not sure why it's called "1600MHz" memory when sold but I'm guessing they are referring to DDR. I'd be more comfortable if they would stick to MT/s.
photonboy
Titan
- Jun 20, 2006
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Exactly.
I would add that if confused whether your system is performing properly (bandwidth) you should run a program like Memtest86 or some Windows application that shows the MB/s (or MT/s) and see if that is close to what it should be.
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