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RAM frequency showing up slower than advertised.


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#1 RunsWithSporks

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Posted 17 February 2012 - 11:55 AM

Hello everyone. I recently built a desktop machine that has been giving me fits. I have 16gb of Corsair DDR3 (CMZ16GX3M4A1600C9B) but when I run Speccy or CPUz the frequency shows up at 600ish. I checked Corsairs site and this kit should be running at 1600. Any ideas on why this is? Nothing has been overclocked. Thanks!

Rest of the machine:

Core i7 2600k
Gigabyte GA-Z68X-UD3H-B3 motherboard
Intel 510 120g SSD
Evga 560ti

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#2 the_patriot11

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Posted 17 February 2012 - 12:14 PM

its most likely a setting in the motherboard-many motherboards dont run 1600+ mhz at stock speeds, you may have to go into the BIOS, find the memory section and manually up it to 1600.

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Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

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#3 RunsWithSporks

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Posted 18 February 2012 - 07:31 PM

I tinkered with my bios some and got it to show up as 800ish in CPUz. Then I did a little digging and found that CPUz shows exactly half your memory speed and you need to multiply it by 2 to get the actual amount. Thanks for your reply.

#4 the_patriot11

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Posted 18 February 2012 - 08:07 PM

Thats because in reality, it is running at half speed. If its 1600 mhz ram, its 800 mhz up, and 800 mhz down, for an effective 1600 mhz total.

picard5.jpg

 

Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

If I don't reply within 24 hours of your reply, feel free to send me a pm.


#5 DavidWJ

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Posted 20 February 2012 - 02:29 AM

That applies for DDR2 now for DDR3 its 1/3rd

#6 Platypus

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Posted 20 February 2012 - 03:51 AM

That applies for DDR2 now for DDR3 its 1/3rd

No, you've misunderstood the implication of DDR3. DDR3-1600 runs on an I/O bus frequency of 800MHz which is reported by utilities as shown in the Jedec table here:

http://en.wikipedia.org/wiki/DDR3_SDRAM

DDR3 transfers 8 banks where DDR2 transferred 4, and possesses other performance enhancements.

The "3" just refers to the next generation architecture following "2".

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#7 RunsWithSporks

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Posted 20 February 2012 - 11:19 AM

Learn something new everyday, thanks.




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