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 AMD 64/SEMPRON ---- OC DATABASE, Ocing results..OC problem?ask here..

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wtm0325
post Oct 26 2005, 12:28 AM


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QUOTE(Najmods @ Oct 25 2005, 03:50 PM)
But I simply cant live with 512MB RAM if I want 2.5GHz CPU sad.gif and in 1024MB it only can be clocked up to 2GHz(285HTT)even 1HTT more it will get a strange error "Detecting array....." after POST
*
change to 1 stick 1 gb ram lo, get it from tembakau, rm300 oni
soulfly
post Oct 26 2005, 03:37 PM

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QUOTE(Najmods @ Oct 25 2005, 03:50 PM)
But I simply cant live with 512MB RAM if I want 2.5GHz CPU sad.gif and in 1024MB it only can be clocked up to 2GHz(285HTT)even 1HTT more it will get a strange error "Detecting array....." after POST
*

Your processor confirm can hit 2.5GHz?

If you have problem with the 'detecting array' thingy ... you need to tweak:
-async latency
-preamble time
-LDT multiplier

these settings are available in the bios. you can try refer to dfi-street.com overclocking database. There, Angry_Games is using the same motherboard as yours. He should be able to help you to run with 1GB ram.

Try refer to this link: http://www.dfi-street.com/forum/showthread...?t=11318&page=2

This post has been edited by soulfly: Oct 26 2005, 03:44 PM
Najmods
post Oct 26 2005, 08:36 PM

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I have registered there,ask them lots of question but either they were unanswered or Angry Games gets angry with me sad.gif

1GB RAM RM300? Great Scott!!! Wheres tembakau? I need one!

Thx for the tips guys,I really appriciate it smile.gif

This post has been edited by Najmods: Oct 26 2005, 08:49 PM
soulfly
post Oct 26 2005, 09:04 PM

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Maybe u didn't follow the rules that's why the guys were angry ... lol laugh.gif
Najmods
post Oct 26 2005, 09:36 PM

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Nope,Im not the type of guy who creates trouble or didnt follow the rules in the forum.Well,back to o/cing......
soulfly
post Oct 26 2005, 09:39 PM

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I still think that you just need to tweak a little bit the memory configuration setting... no big deal.
KilJim
post Oct 26 2005, 09:50 PM

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ppl will also get pissed off if u ask questions that have obvious answers or can be found through Google
Najmods
post Oct 26 2005, 11:09 PM

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Well,I tested my CPU.This Sempron wont handle 2 stick of RAM above 285HTT. looks like this is the limitation of this CPU,I try to bump the voltage (even up to 1.7V) but it failed Prime95 in Small FFT(data fits in L2 cache),which simply means that it not the RAM that not stable,its the CPU itself is the limitation.

Doing some benchmark,between 1.98GHz 283HTT 3:2 with memory (timing 2,3,2,6) and 1.87GHz 267HTT 1:1 (highest bechable) with memory(timing 3,3,3,8) , the 1.87GHz 267HTT 1:1 is faster than the former.The former get 3600+ 3DMark2005 CPU test and 8400+ CPU score Aquamark3 while the latter get 4100+ 3DMark2005 CPU test and 9000+ CPU Score in Aquamark3

This prove that a high clocked CPU is inferior if it not backed up by a fast memory

Now running at 267HTT 1.45V highly stable and still playing with memory timing,try to find the stable timing

EDIT:
The max stable timing 3,4,3,5 at 2.8V memory bandwidth in SANDRA is 94% efficency! Quite good!
soulfly
post Oct 27 2005, 02:13 AM

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QUOTE(Najmods @ Oct 26 2005, 11:09 PM)
Well,I tested my CPU.This Sempron wont handle 2 stick of RAM above 285HTT. looks like this is the limitation of this CPU,I try to bump the voltage (even up to 1.7V) but it failed Prime95 in Small FFT(data fits in L2 cache),which simply means that it not the RAM that not stable,its the CPU itself is the limitation.
*
Your Sempron is based on E6 rev Venice.... therefore, such limitation is not relevant.

The reason why I ask u to tweak the memory configuration (the extra timings) is simply because the memory controller is in the CPU itself. Refer to dfi-street overclocking base results for your base setting, and then you start to tweak further from there.

I believe you never touched the extra timings yet don't u?
Najmods
post Oct 27 2005, 04:16 AM

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I have done EVERYTHING that I think that can be possible to increase my o/cability. BUt it keeps stuck at 285HTT! Stupid DFI mobo!
soulfly
post Oct 27 2005, 03:25 PM

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can you post your complete DFI bios timing settings?

already use LDT multi 3x? Maybe u need 2.5x....
wtm0325
post Oct 27 2005, 03:48 PM


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QUOTE(Najmods @ Oct 27 2005, 01:05 AM)
Doing some benchmark,between 1.98GHz 283HTT 3:2 with memory (timing 2,3,2,6) and 1.87GHz 267HTT 1:1 (highest bechable) with memory(timing 3,3,3,8) , the 1.87GHz 267HTT 1:1 is faster than the former.The former get 3600+ 3DMark2005 CPU test and 8400+ CPU score Aquamark3 while the latter get 4100+ 3DMark2005 CPU test and 9000+ CPU Score in Aquamark3

This prove that a high clocked CPU is inferior if it not backed up by a fast memory

Now running at 267HTT 1.45V highly stable and still playing with memory timing,try to find the stable timing

EDIT:
The max stable timing 3,4,3,5 at 2.8V memory bandwidth in SANDRA is 94% efficency! Quite good!
*
i agree on tht too, memory does affect significant performance oso
Najmods
post Oct 27 2005, 09:03 PM

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QUOTE(soulfly @ Oct 27 2005, 03:25 PM)
can you post your complete DFI bios timing settings?

already use LDT multi 3x? Maybe u need 2.5x....
*
DRAM Frequency set : 3:2
Command Rate : 2T
CAS Latency : 3
RAS# to CAS# delay tRCD 4
Min RAS# active timing tRAS 8
Row Precharge Timing tRP : 4
Row Cycle Time : 15
Row Refresh Cycle Time : 17
Row to Row Delay 4
Write recovery Time : 3
Write to Read Dely : 2
Read to Write Delay : 6
Refresh Period tRTW : 3120 cycle
DRAM Bank Interleave : Disable (although enable also stable)
Max Async Latency : 9ns
Read Preamble Value : 7ns
Idle Cycle Limit : 32 cycle
Dont know what its name in BIOS but the value is 2 burst

Highest I get 285HTT

This post has been edited by Najmods: Oct 27 2005, 09:05 PM
soulfly
post Oct 27 2005, 09:47 PM

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try these....

HT frequency = 3 (or lower.... 2x if possible. if there is 2.5x... then use 2.5)


Row Cycle Time = 12 (or lower)
Row Refresh Cycle Timer = 24
Max Async Lantecy = 8
Read Preamble Value = 6
Idle Cycle Limit = 256clk
Burst length = 4 Beats
1T/2T memory timing = 1T

also try to bump your cpu voltage 1 step.

This post has been edited by soulfly: Oct 27 2005, 09:49 PM
Najmods
post Oct 27 2005, 10:05 PM

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Nope still wont work,only stable at 285HTT.Above that I tried 286,287,288,289,290 not stable,wont load windows
wtm0325
post Oct 27 2005, 11:11 PM


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najmods, wats the best timing n highest oc for ur ram? try to max out the ram 1st using 1:1 using 1T, becoz 2T is really sh*t performance...

i'll trust 6:5 setting will give a performance boost if max htt stuck at 285, ur ram shoulf be able to handle around 236mhz at 1T

or just buy 1 stick 1gb ram from tembakau, i'll trust the ram can do around 230mhz, tht time u can go as high as 345htt which maybe the ram limit at 3:2 memory divider




Najmods
post Oct 28 2005, 12:50 AM

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My RAM maxed out at 267MHz when 1:1,Timing 3,4,3,5 1T at 3V
wtm0325
post Oct 28 2005, 01:13 AM


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QUOTE(Najmods @ Oct 28 2005, 12:50 AM)
My RAM maxed out at 267MHz when 1:1,Timing 3,4,3,5 1T at 3V
*
cool dude, i'll trust u can get better timing at at around 236mhz ram speed?

for the time being, use 6:5 divider to squeeze the max performance at 285htt now (since this is ur max htt for 2 stick ram), it'll be a better choice biggrin.gif
Najmods
post Oct 28 2005, 01:45 AM

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QUOTE(wtm0325 @ Oct 28 2005, 01:13 AM)
cool dude, i'll trust u can get better timing at at around 236mhz ram speed?

for the time being, use 6:5 divider to squeeze the max performance at 285htt now (since this is ur max htt for 2 stick ram), it'll be a better choice biggrin.gif
*
That particular Divider wont work,the only divider works is 1:1 and 3:2!

Thats why Im so pissed off,asking so many question
soulfly
post Oct 28 2005, 10:34 AM

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The thing is... each time you use different divider, you will need to have different configuration with the RAM.

for instance.... I can do DDR600 prime stable with 1:1 (300/300)

but the.... it wont prime stable at DDR600 with 9:10 (300/338). at first it wouldn't even memtest stable at that setting, but after a few tweaking i can get superpi 32m and occt finish, only that still have problem with prime.... error after 3hrs.

it can do prime stable at DDR540 with 5:6 (270/338). before that with 2.5-4-3-7, but then after some minor tweaking i could running it at 2.3-3-7.

all these are done by tweaking the extra memory options

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