32m Low Clock Challenge

[eva2000]

tRD loosened from 6 to 7 at same clocks can slow 32M times by 4-10 seconds depending on cpu and mem clocks from the little testing i done... i still can't even get tRD = 5 to run stably though i think you need >2.4v vdimm and/or Micron D9 or memory that runs tighter latencies...

[Gautam]

Hehe, try running a 1:2 divider, I was dumb not to take a full CPU-Z shot of this, but take my word for it, this was at 538MHz...



Now I'm messing with 2:3 because of that time you just put up, 5 = instant freeze. tRD is somehow intrinsically tied to the divider. Seems like you can run it at 5 1:2, 6 2:3 but generally only 7 4:5.

Aren't your mems D9GMH?

[eva2000]

yeah mine are D9GMH.. but they aren't the same

interesting but doesn't explain your 1:1 tRD = 5 i think it might be memory module related or P5W DH bios ??? or vdimm used heh

what vdimm did you use for 400mhz 1:1 tRD = 5 with 3-3-3-8 ?

[Gautam]

You're right I guess it doesn't explain why I can do 5 at 1:1.

Always 2.4v, BIOS 701, Team Group PC2 5300. Btw I can't get them to 32M even at 533MHz 2:3. :-/ So they aren't anything special.

It seems pretty clear to me though that I'm loosing speed each time I go down a divider. 1:2 seems to be the easiest by far. Some of this stuff has got to do with the SPD tables. I can't do 4:5 no matter what past 480, tried tRFC as high as 45 and tRD 7. :S But you have no problem even with low tRFC.

[eva2000]

sounds like your memory is binned for tight timings hence tRD = 5 mine are higher clocks at looser timings i.e. i'm at 540-542mhz 4-4-4-8 at 2.4v and 552mhz 5-5-5-5 at 2.4v right now hehe

[Gautam]

I gain 0 MHz going from 4-4-4 to 5-5-5. I think its more than binning though...there are probably internal parameters in the SPD tables that we can't control at play here.

[eva2000]

yeah probable

How's this for 2x1GB Gskill PC6400PHU2 HZ Micron D9GMH 0629 batch

2:3

10x360fsb 2:3 540mhz 4-4-4-8 at 2.4v = PC2-8640



loosen memory timings and managed to pull off 10x368fsb 2:3 552mhz 5-5-5-5 at 2.4v = PC2-8832 memory

[VictorWang]

this one:
P5WDH-Deluxe 1101
Team DDR2_1000 1G*2 Victor ED
Intel Stock Cooler
zippy psl-6701p
ambient=26c

Conroe E6700es B2 stepping @ 3734mhz

[eva2000]

woah crazy 560mhz 4-4-3-1 timings!

[dinos22]

eva your and my ram can do the same but we just need more vdimm

incidentaly what vdimm was that at

[eva2000]

yeah i know more vdimm is needed hehe

[SLi_dog]

How's this one?

[IluvIntel]

SLi Dog, does that count as low clock speed @ 3788Mhz for conroe in this thread ?

[SLi_dog]

SLi Dog, does that count as low clock speed @ 3788Mhz for conroe in this thread ?

Probably not. My bad .
It's on the stock Intel HSF though, that's low to me .

Edit: Hey, RodneyJM

[IluvIntel]

Probably not. My bad .
It's on the stock Intel HSF though, that's low to me .

Edit: Hey, RodneyJM

Yoohhh ! whats hapen'in my man !
Nice to see a fellow i4memorian on this wonderful forum..

My turn.

[dinos22]

i think you guys are both missing the point

the point is to run xxM 5xS runs at lowest possible MHz

[longsiew]

Am I eligible???

around 19min, tho=(

[dinos22]

you should be doing a sub19 minute times NOT just over 19m times

also it's pretty slow

you should be able to do it around 2550MHz with an Allendale

i did this run while testing ram recently to give you an idea

[eva2000]

Lowest clocked cpu on hwbot top 10 and non-X6800 cpu too

E6700 QPGA B1 @4416Mhz at 1.7 bios set = 1.648-1.656v vcore
2x1GB Gskill PC6400PHU2 2GBHZ Micron D9GMH @552Mhz 4-4-4-4 at 2.51v (max pencil modded vdimm).

[Gautam]

It's a pleasure to see you on subzero cooling.

[bachus_anonym]

Since some of you guys are still missing the point of this thread, here's a valid submission

Core 2 Duo E6600 @ 402x9=3618Mhz, Corsair 6400C3 @ DDR2-1206 8-4-4-4.0 --> 12:59.922
vdimm: 2.45v (BIOS) --> 2.47v LOAD (DMM)
vcore: 1.48v (BIOS) --> 1.46v LOAD (DMM)
ASUS P5B Deluxe, not yet modded at all
Still on Intel stock cooler

I just barely made it into 12:xx category, which IS the goal to achieve at the LOWEST possible CPU clock.

[dinos22]

Since some of you guys are still missing the point of this thread, here's a valid submission

Core 2 Duo E6600 @ 402x9=3618Mhz, Corsair 6400C3 @ DDR2-1206 8-4-4-4.0 --> 12:59.922
vdimm: 2.45v (BIOS) --> 2.47v LOAD (DMM)
vcore: 1.48v (BIOS) --> 1.46v LOAD (DMM)
ASUS P5B Deluxe, not yet modded at all
Still on Intel stock cooler

I just barely made it into 12:xx category, which IS the goal to achieve at the LOWEST possible CPU clock.

i told you guys 3.6GHz sub-13 is doable

shame coop isn't updating any more >>> that's a killer time man

[eva2000]

It's a pleasure to see you on subzero cooling.

thanks already smashed that time at same exact clocks and then smashed it a few more times..

bachus, crazy mem clocks there

[sierra_bound]

This is my contribution:

P5B Deluxe + E6400



And yes, the CPU will run much higher.

[bachus_anonym]

i told you guys 3.6GHz sub-13 is doable

shame coop isn't updating any more >>> that's a killer time man

I think that's my "balls to the wall" effort. I tried few more times and I just can't make it below 13m at 3.6GHz. I think, that might be as good as it gets

bachus, crazy mem clocks there

Freakish set, I know It maxes out 16M @ 608-610 8-4-4-4.0, 2.45v

@sierra_bound,

Glad you joined us here, man! That's a nice one for 2MB... Show us what you got with E6600!