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1600 RAM showing max bandwidth in CPU-ID as 667mhz?

Tags:
  • Memory
  • Kingmax
  • RAM
  • Bandwidth
  • CPUs
Last response: in Memory
a b à CPUs
September 29, 2013 9:16:46 PM

I have just purchased 8bg
(2x4gb) Kingmax DDR3 1600 sticks for my cpu. I was running good old 1333 before, so when i installed RAM i set the frequency to 800MHZ (auto was setting at 533?) and just went from there.

I Just recently checked cpu-z and its stating that my DRAM freq is 800mhz, but when i look in the SPD section it gives a detailed description of my RAM (being Kingmax Semi-Conductor FLGF65F-c8kl9a- Max supported bandwidth 667mhz?????)


I asked my retailer and he said to ignore the max rated frequency and just run it at 800mhz, because thats what the packet says...... bad answer in my opinion. Why would the RAM have 1600mhZ all over the packaging but show a max operating frequency of 1333mhz during operation. Once again my DRAM freq is 800mhz as i have it set manually because it auto sets at 533 otherwise. Should i be worried or is it not a problem. If my memory is only rated at 667 (even though i paid for and it says 1600mhz all over the modules) could that lead to instability if ran at 800 instead of 667?

More about : 1600 ram showing max bandwidth cpu 667mhz

September 29, 2013 9:22:34 PM

I misread the thread. It might be that your RAM is 800MHz supported, BUT maybe your motherboard only supports a max of 667MHz or DDR3-1333. Check the max speed on your RAM slots. You can probably run @ 1600MHz through an XMP profile that will automatically adjust the settings for it since it would be basic overclocking for your RAM.
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a c 305 } Memory
a c 1203 à CPUs
September 29, 2013 9:22:44 PM

800MHz with dual data rate becomes 1600MHz, the spd you are looking at 667MHz = to 1333Mhz is correct the 1600MHz is an XMP profile for your ram (very common). If you have it set to run at 1600MHz you are fine.
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Related resources
a c 132 } Memory
a c 377 à CPUs
September 29, 2013 9:26:44 PM

in cpu-z memory tab there will be a few line for ram speed. most newer ram have a few default speeds that are not xmp profile. in cpu-z the last line on the right is the xmp line.
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Best solution

a c 5047 } Memory
a c 1387 à CPUs
September 29, 2013 10:07:41 PM

In CPU-Z the frequency shown in the Memory tab is true freq, (take it times 2 for effective i.e. 800 x 2 = 1600), when you first install DRAM it runs at the mobos default - generally 1333 or 1600 with Intel, in the SPD tab it shows info pulled from the info of the sticks (which is just that, simply info) what shows under MAX BADWIDTH in the SPD tab of CPU-Z ifs the proposed default boot speed of the DRAM from it's SPD - more on CPU-Z here in a bit I wrote last year:

http://www.gskill.us/forum/showthread.php?t=10565
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November 28, 2013 2:52:16 PM

i have the exact same problem. but seems the people arent getting the point.

okay ive run it at 1600 stable. its rated 1600 and currently running @800mhz.

but cpu says dram max bandwidth is 667. and isnt 1600 simply means 800x2 and as advertise?
so its like not getting what i paid for.

am i wrong into thinking that 1600 rams should have a max bandwith of 800mhz?
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November 28, 2013 2:52:35 PM

i have the exact same problem. but seems the people arent getting the point.

okay ive run it at 1600 stable. its rated 1600 and currently running @800mhz.

but cpu says dram max bandwidth is 667. and isnt 1600 simply means 800x2 and as advertise?
so its like not getting what i paid for.

am i wrong into thinking that 1600 rams should have a max bandwith of 800mhz?


nyway sorry for my bad english.
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a c 5047 } Memory
a c 1387 à CPUs
November 28, 2013 5:27:31 PM

There's a few misconceptions about CPU-Z and Max Bandwidth is one of them, that's actually the setting for a default install, most all mobos these days default new DRAM installs to 1333, see more on CPU-Z here:

http://www.gskill.us/forum/showthread.php?t=10565
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July 10, 2014 7:20:24 AM

so i have a kingston KHX1600C10D3/8G it shows 1600 mhz on the box but shows only 800mhz on screen so thats normal ?? or have i been cheated buy someone
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a c 5047 } Memory
a c 1387 à CPUs
July 10, 2014 8:24:02 AM

It's DDR (DOUBLE data rate) so 800 (true) x 2 = 1600 (effective) so you are fine
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July 10, 2014 8:35:43 AM

thx bro
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a c 5047 } Memory
a c 1387 à CPUs
July 10, 2014 8:46:36 AM

No worries
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December 13, 2015 9:05:06 PM

In english: Your motherboard is a lazy POS like mine and you need to tell it what to do. I have been suffering with 6 cas latency and ddr800 ram even though I have DDR1300 installed.

Self diagnosed and troubleshootedadid. Stoked ;) 
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December 13, 2015 9:05:21 PM

TF2 is running SO much more consistently now. Wow.
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