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Patriot G2 XMP-1600 RAM( "For P67") on AM3+ Board/CPU

post #1 of 4
Thread Starter 
InB4 TL; DR

Did I make a mistake buying this Patriot G2 Set for an AM3 990 board?

Patriot has it listed as a PC-12800 DDR3-1600MHz set, but as you can see below, CPU-Z as well as AIDA64 are reading the RAM as DDR3-1333.

http://valid.canardpc.com/show_oc.php?id=2127688

I have a DDR 1600 OC Profile enabled on my BIOS, have manually set the voltage to 1.65v and speed to 1600 and everything seems stable with 6hrs IBT.

Not sure what to make of this...Should I be ordering new RAM?

I really appreciate the help guys!
Edited by Raven.7 - 12/1/11 at 10:38pm
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post #2 of 4

This is exactly what you're supposed to do actually, set the RAM (possibly yourself) to run at rated settings.  Due to SPD (serial presence detect) defaults (i.e. programmed generic spec presets) it will always read as DDR3-1333.

According to your CPU-Z you are running the memory at 1600Mhz but at high and impractical timings of 11-11-11.  Set those timings manually to 9-9-9 and ensure rated voltage and you are set thumb.gif

post #3 of 4
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post

This is exactly what you're supposed to do actually, set the RAM (possibly yourself) to run at rated settings.  Due to SPD (serial presence detect) defaults (i.e. programmed generic spec presets) it will always read as DDR3-1333.


According to your CPU-Z you are running the memory at 1600Mhz but at high and impractical timings of 11-11-11.  Set those timings manually to 9-9-9 and ensure rated voltage and you are set thumb.gif

Awesome, all set. A quick session of IBT @ Max settings burning up 6GBs of RAM tells me my OC remained stable biggrin.gif

I really need to put some time into learning what all these timings mean!

Thanks a lot xd, you've done it again !cheers.gif
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90GB Corsair SSD + 2TB Raid Corsair H100 Windows 8.1 2x Asus PA248Q 
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post #4 of 4
Unfortunately with the higher frequencies of DDR3 RAM there is almost no gain by tightening the latencies as the incremental difference of one clock cycle is smaller in real time compared to slower DDR2 RAM. If it runs with tighter latencies fine. If not use the looser ones as you won't be able to tell any system performance difference. Even bumping the frequency from 1333 MHz. to 1600 MHz. is only worth ~1% in sysytem speed, which is imperceptible.

It is worth noting however that not all RAM qualified for Intel CPUs works well with AMD CPUs and vice versa, so it's wise to buy properly validated RAM for your specific CPU to prevent headaches and RMAs.
Edited by AMD4ME - 12/2/11 at 5:15pm
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