Gigabyte Mobo/Kingston HyperX 1600

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oste0130

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Jan 12, 2012
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I'm looking for some clarification please. I got a few BSODs recently and each said memory management, so I think I might have done something I wasn't supposed to. All i did was go into my BIOS and in the M.I.T. Intelligent Tweaker I changed the DRAM from x6.66 to x8, to utilize the full 1600 my RAM allows. (this change was actually does a couple months after installing the RAM)

My specs:

Here's my specs:
CPU: AMD Phenom IIx4 925 2.8GHz
**GPU: EVGA GeForce GTX 460 (v2) 1GB DDR5
**PSU: Antec High Current Gamer 620W
Mobo: Gigabyte GA-M68MT-S2 ver 1.3 ________specs🙁 GIGABYTE - Motherboard - Socket AM3 - GA-M68MT-S2 (rev. 1.3))
**RAM - 2x4GB Kingston HyperX 1600 DDR3

** these are the three parts i've upgraded over the past few months

*****************************************************

Few things:

When looking deeper at my mobo memory spec, i see this:

1. 2 x 1.5V DDR3 DIMM sockets supporting up to 8GB of system memory 2. Dual channel memory architecture
3. Support for DDR3 1333+/1066/800 MHz memory modules

Now, does (3.) indicate that my mobo can't handle 1600? Or is the "+" sign saying i can?
Also, Does (1.) indicate a max voltage at 1.5 in both slots? When looking in CPU-Z on the SPD tab, the XMP setting at 1600 requires 1.65 volts. Can someone clarify this for me?
Is my MoBo too old to run my RAM sticks at 1600?
If this isn't an issue, what do you think caused the 3 BSODs I endured (all three occured while playing Skyrim and Bioshock)

Thanks in advance for any direction :)
 
Solution
jaquith
Problem, all I noted was CPU NB VID Control which is not CPU-NB Voltage, so IMO if you're running DDR3-1333 8-8-8-24 the difference between DDR3-1600 9-9-9-27 is very small. Therefore leave it be. RAM speed is a function of BOTH Frequency (higher = faster) and CAS Timings (lower = faster). You are OC'ing the RAM and it's running faster than Rated! 😉

See the chart:

CAS_Frequncy_Chart.png
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I'm new to a lot of this stuff and this is the first computer I am actually attempting to upgrade piece by piece.

So, if I understand you correctly, the RAM I bought runs at 1.65V, when i needed to buy a 1.5V version? Or is this voltage change done in the BIOS as well?

 
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"the RAM I bought runs at 1.65V, when i needed to buy a 1.5V version?"

That's correct.

All is not lost, however. You might be able to run it at 1.65 volts if your MB supports adjusting the ram voltage. You'll have to look at the memory settings in the BIOS for yourself and see.

If you can run the ram at 1.65 volts, then you should be able to set BIOS to run the ram at 1600 Mhz. If you can't se the voltage though, the chances of it running at full speed are nil.
 
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The 'problem' is if you're running the RAM at DDR3-1600 on any AMD Phenom (x4 or x6) without either a FSB -> 240MHz <or> CPU-NB Frequency -> 2400MHz then it'll be unstable. In addition, quite often the 4GB densities require a BIOS update.

Q - What EXACT set of RAM ; please provide a link.
Q - What BIOS version?

Afterwards, I'll post the settings.
 
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KHX1600C9D3K2/8GX - http://www.valueram.com/datasheets/KHX1600C9D3K2_8GX.pdf
DDR3-1600 9-9-9-27-2T @ 1.65v

GA-M68MT-S2 (rev. 1.3) - http://www.gigabyte.com/products/product-page.aspx?pid=3645#dl
F1 - one and only BIOS release ??
Support for DDR3 1333+/1066/800 MHz memory modules

Problem, your MOBO doesn't list ANY OC'ing in the Manual i.e. FSB or CPU Ratio control

AMD Phenom II X4 925 Deneb 2.8GHz

Some math:
2800MHz / 200MHz = 14 CPU Ratio
2800MHz / 240MHz = 11.67 ; 12 * 240MHz = 2880 MHz = 2.88GHz

1600MHz / 200MHz = 8 Memory Multiplier
1600MHz / 240MHz = 6.67 Memory Multiplier

BIOS:
FSB -> 240MHz
CPU Ratio -> 12

Set Memory Clock -> 6.66 ; 8 with FSB 200Mhz
DRAM Configuration /Enter
CAS# latency -> 9
RAS to CAS R/W Delay -> 9
Row Precharge Time -> 9
Minimum RAS Active Time -> 27
1T/2T Command Timing -> 2T
-
DDR3 Voltage Control -> 1.64v~1.65v

Save & Exit = Yes

Oddly, in the manual I see Set the CPU host frequency in accordance with the CPU specifications. but nothing in the manual for the BIOS to actually set it.

You might be stuck running the RAM at DDR3-1333, the CAS Timings per the spec sheet are the same 9-9-9-27-2T @ 1.50v.

If there's no way to OC then settle with the following, at least it will run faster and pretty close to DDR3-1600 CAS 9.

OC RAM DDR3-1333 8-8-8-(24~27) @ 1.55v

BIOS:
Set Memory Clock -> 6.66
DRAM Configuration /Enter
CAS# latency -> 8 ; 9 if failure
RAS to CAS R/W Delay -> 8 ; 9 if failure
Row Precharge Time -> 8 ; 9 if failure
Minimum RAS Active Time -> 24~27
1T/2T Command Timing -> 2T
-
DDR3 Voltage Control -> 1.52v~1.55v ; start with 1.55v

Save & Exit = Yes
 
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This is what i went ahead and changed the setting to in the BIOS. (the only adjustments I can make to the DDR3 voltage is from .1v - .7v. anything above .3 is a red font color and anything .5v and above is flashing, as a warning. I honestly am only comfortable going up .2v. So that would make it 1..52v total correct?)

TBH, not sure what you were saying in the beginning of the post. I'm still new to all this.

You are correct, there's no way to change the FSB or the NB frequency. I may be able to adjust it using EasyBoost software that came with gigabyte disc but i know awful things can happen with OC software and would rather use the BIOS to do so.

Do you think the BSODs were a result of voltage issues? Perhaps the few times it did crash the RAM was trying to draw too much power at 1600Mhz?

Thanks for your help!
 
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In the BIOS a +0.1 = 1.60v assuming the 1.50v as base, so a +0.02v~+0.05 for DDR3-1333 and a +0.15 for 1.65v.

IMO the BSOD's are due to your CPU's IMC which is common on pre-FX CPU's, the IMC simply cannot handle the stress of DDR3-1600 without some form of OC. Over or under volt'ing has the same outcome of instability.
 
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Ahh yes, my mistake. Unfortunately my DDR3 voltage control only goes up in .1v increments. So, it looks like my only "safe zone"options(as denoted by the non-red, blinking font in the BIOS) are normal @1.5v, or +.1v@ 1.6v, or +.2@ 1.7v.

Currently its at 1.6v with the same timings as you suggested. Am I still OK?

Thoughts on putting it back to x8.00 (1600) and bumping the volts up to 1.7? Or is that just being reckless?

I appreciate your imput. tyvm
 
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Problem, all I noted was CPU NB VID Control which is not CPU-NB Voltage, so IMO if you're running DDR3-1333 8-8-8-24 the difference between DDR3-1600 9-9-9-27 is very small. Therefore leave it be. RAM speed is a function of BOTH Frequency (higher = faster) and CAS Timings (lower = faster). You are OC'ing the RAM and it's running faster than Rated! 😉

See the chart:

CAS_Frequncy_Chart.png
 
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