Best timings for AMD64?

[over_c]

I remember reading an article at one point that said the best timings for AMD CPUs was not 2-2-2-5. The sweet spot was somewhere around 2-2-2-8. Did that article apply to AMD64s? If so, what are the best memory timings for the AMD64 memory controller? Have those best timings changed with the release of Venice and San Diego and their improved memory controller?

I realize that I am talking fractions of a percent of performance, but I might as well get everything I can get out of my system.

 

[RichPLS]

I recall people posting 2-2-2-10 with the XP? is 11 best?

<pre><font color=red>°¤o,¸¸¸,o¤°`°¤o \\// o¤°`°¤o,¸¸¸,o¤°
And the sign says "You got to have a membership card to get inside" Huh
So I got me a pen and paper And I made up my own little sign</pre><p></font color=red>

 

[over_c]

Thanks for the info Wusy.

I an attempt to answer my own question I will be running some benchmarks this weekend to determine the sweet spot for my new 3700+ San Diego.

I will run 3DMark03 and PCMark04 at 2-2-2-5, -6, -7, -8, -9, and -10 to see if I can determine a quantifiable difference in those benchmarks. I'll run each benchmark 3 times and average the results. That should make for a fun Memorial Day weekend.

 

[Vapor]

For general performance....2-2-2-8 vs. 2-2-2-5 isn't a huge difference (or even a noticable difference across different apps). But if you want the best performance in a certain app, it will vary by the app.

Maxtor disgraces the six letters that make Matrox.

 

[DrJeckyl]

Ok my friend, I have done much testing with memory over the last few years, and QUITE a bit within the last several months. That A64 you have is going to want 2-2-2-7 as Wusy said. There are very small variations between motherboards and memory modules themselves of course. You will see that 2-2-2-5,6,7 will all give you nearly the exact same results at stock(I'm talking so close that with 5 tests run, 3 of them came back identical). As you ramp the speed up, you'll have to loosen the timings accordingly. The 2-2-2-10 timings people are referring to are the settings for the XP's.

-- the Doc

LanPartUT SLI-DR
A64 3200+
1GB OCZ VX Gold PC4000
Sapphire X850XT
WD360GD (boot drive)
WD740GDx2(RAID 0)

 

[mozzartusm]

As you know, I run Intel systems so this may not hold true for you. Every system that i have seems to react a little differently to timings. The one that surprises me most of the time is the 4th one. I have found that most of the time this number doesnt produce the best benchmarks when its set to low.

Intel P4 550(3.4)@<font color=green>5Ghz</font color=green>
Asus P5AD2-E-Premium
Crucial Ballistix DDR2 667@<font color=red>DDR2 800<font color=red> Owned!
TT 680W PSU

 

[over_c]

Ok, thanks.

I was not trying to imply that Wusy was wrong. It's just that the San Diego and Venice cores are said to have an improved memory controller. I thought that might change the optimal timings for those two new cores.

 

[DrJeckyl]

Oh, I know that you weren't saying he was wrong. I was just confirming what was said in the previous post, and adding a little to it.
That's the only thing about only seeing someone's words, you can't tell what they mean sometimes, for the tone in my voice can make the same sentence have different meanings.
Anyways, good luck with the OC.

-- the Doc

LanPartUT SLI-DR
A64 3200+
1GB OCZ VX Gold PC4000
Sapphire X850XT
WD360GD (boot drive)
WD740GDx2(RAID 0)