Poser

DDR 400 refers to a 1:1 divider... i.e. running your FSB (HTT) and multi at an equal ratio to your memory.

e.g. HTT = 220 x Multi (10) for a clock of 2.2ghz with your mem running at 220mhz or DDR440

Basically its telling you that your board is capable of running Double Data Rate Memory in a 1:1 ratio with your HTT or front side bus

so you can run memory in you board at DDR500 by running your FSB at 250 in a 1:1 ratio with mem controller

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natev

currently im at fsb 250 multi 11.5 ram ddr266 in bios.

im relatively new to this, but this has been one of the more stable overclocks ive done. it passed the 32M superpi stress. It also ran SP2004 on blend for a little over 2 hours before I stopped it.

im a little unclear about the divider rules. is the divider different if my motherboard only supported up to ddr333?

but if i wanted to run ddr500. fsb 250 x 10 mem ddr400 in bios?

Oscuro

You know, I just came to a rather funny realization:
What could I have gotten for my money instead of this:

Asus 8800GTX - $450
G.Skill DDR500 (Can't remember size) - $162.50
WD500 gig HD - $105 American
Opteron 170 - $155.06
CM Stacker 810 - $194.72

Corsair 620HX PSU
Noctua NH-U9F
LG SATA Burner
3x Noctua NF-S12-1200 fans - $316.01
_______________
Total: $1383.29

....
I better hope I FULLY appreciate this Opty 170!!

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Official Socket 939 Appreciation Club & Knowledge Base
CM Stacker Club

pioneerisloud

Not a problem if your confused at first. RAM is a pain in the arse to get to work the way you want. Here's a little helpful guide. If you've got DDR400, then these settings will keep you in the "safe" zone right around 200MHz (DDR400):

200-210FSB - 200MHz divider (DDR400)
211-250FSB - 166MHz divider (DDR333)
251-333FSB - 133MHz divider (DDR266)
334+FSB - 100MHz divider (DDR200)

Now you see, what happens is when you turn your FSB speed up, your RAM speed goes up with it. For example, if you have DDR500, you set your divider to 200MHz (DDR400), and up your FSB to 250. That will also put your RAM at 250MHz...which in turn is DDR500. Your board CAN AND WILL run 4 sticks at DDR400 speeds...it might just take some work to get it there. When you're overclocking...check CPUz after tuning something. It tells you what your RAM is currently running at. Right now I'll bet you're right around DDR333 speeds (166MHz ish). I'll bet if you switch it to the 166 divider (DDR333), your RAM will shoot up to around 212MHz (or DDR424), and I'll bet it'd work fine. The settings I listed above will keep your RAM right around 200MHz (DDR400)...and won't go higher than 212MHz (DDR424).

Now if you are absolutely dead set on spending money on some RAM this kit will not steer you wrong, I promise. If you want to play it safe with the kit I listed....use the divider settings I listed.

Hope this helped.

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pioneerisloud

Now I'm sure most of you have heard the rumor that higher front side bus and lower multiplier means a faster computer. Well today I'm here to test that theory! I need some volunteer software benchmarks I can run. Now the test system:

My Sig Rig:
Opty 165
2GB of DDR500 OCZ Platinum
ASUS A8N32-SLI Deluxe Motherboard
I mean...c'mon its all in my sig.

Anyways...here are the variables:
I'm going to adjust the following:

Test 1:
FSB - 333MHz
Multi - 9x
HT Link - 3x
RAM Divider - 133MHz (DDR266)
Timings - 3,3,2,7,2T

Test 2:
FSB - 370+ (whatever I can wrastle stable..currently testing 370)
Multi - 8x
HT Link - 2x
RAM Divider - 133MHz (DDR266)
Timings - 3,3,2,7,2T

Now the reason I'm thinking test 2 might just end up faster is mainly the RAM. On test 1, my RAM ends up running at 214MHz (DDR428). Not all that impressive. On test 2 however, my RAM ends up running at 247MHz (might as well call it DDR500). Another variable is the front side bus. I'm thinking the extra front side bus speed IS actually making a difference afterall...even though I lose roughly 40MHz off my overclock.

I also believe all this to be true because when using test settings 1...my desktop loads REAALLLL slow. Like 2-3 minutes or so. With test settings 2...its almost an instantaneous load time. I love it!

So anyways....let me know what benchmarks you'd like to see pertaining to this, and I'll see if I can make them work. Will keep you fellas updated with stability once its reached....and what speed and so on.

EDIT: OMG ROFL !!!!

Look twice here guys. Check out my hopeful FSB speed....and look what post number I've taken for this project???? See anything worth laughing about, lol?

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pioneerisloud

Alright guys sorry for now triple posting....but I think these deserve seperate posts.

370 x 8 (test setup 2) is 100% OCCT stable. Orthos causes BSOD. But that's fine...OCCT stable is all I need for these tests. So now I just need a list of benchmarks you guys would like to see ran. 3DMark...leave that out...I doubt it'd help any there. Anything else, just let me know.

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thlnk3r

Pioneer, if you hit 400HTT I'll send you a used 70mm fan

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AMD Overclocking Guides · Opteron 170 LCBQE @ 3.2Ghz · My lapped Opteron 170 · My CM690

Quote:

Originally Posted by txtmstrjoe Note: Stepping recommendations are NOT a guarantee of an overclocking result. They merely indicate possible outcomes due to the law of averages being in your favor.

Poser

Pioneer... any of the sandra suite test.... everest benches.... those would be nice.

Also... do we really think that my mem-controller reached max saturation at 158mhz (ddr316) with 4*1gb stix of ram. I have tried mutliple timings, fsb and multi combos only to find that as soon as try to push over 158mhz... I cant boot. Either at 2.8ghz or 2.2ghz same result. Am I sacrificing overall performance by going with 4gb ram (although the system does seem altogether snappier)

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txtmstrjoe

I suggest a test recording RAM bandwidth (SiSoft SANDRA?).

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OCN AM2/AM2+ Club Supporter"What time is it? It's 9:39!" (The Official S939 Appreciation Club and Knowledgebase)Technical Joe-Pinions

“Give a man a fish; you have fed him for a day. Teach a man to fish, and you have fed him for a lifetime.”—Lao Tzu (thanks to Blitz6804)

Today's "thlnk3r's thoughts": (My wife) wants to turn on the heater...OH HELLLL NO. No one touches the heater button unless I SAY SO *holds a shotgun*

thlnk3r

Poser, that reminds me. I had a OC while back with a Opteron 146 and 4 sticks of memory. It was 4x256 sticks of Corsair DDR400 XMS low latency memory. I believe the factory timings were 2-3-2-6 2T. I was able to OC from 2Ghz to 2.6Ghz stable with my memory OC'ed to 217mhz. It ran great for the longest time

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AMD Overclocking Guides · Opteron 170 LCBQE @ 3.2Ghz · My lapped Opteron 170 · My CM690

Quote:

Originally Posted by txtmstrjoe Note: Stepping recommendations are NOT a guarantee of an overclocking result. They merely indicate possible outcomes due to the law of averages being in your favor.