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 AMD K8 Family Overclocking (754/939/940/AM2/1207), General discussions and newbies' guide

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e-jump
post Feb 18 2006, 07:48 AM

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just wondering, whats the cause of rebooting while doing superPI/test?
not enough juice for ram/cpu?

this never happened to me when im using dt-d43 in the old days sweat.gif
if either one lacking juice, it usually show fail squareroot blablabla...

shocking.gif

gr2000
post Feb 18 2006, 10:13 AM

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does ur SuperPI just stop calculating..or does ur whole CPU reboot?

most likely its not enough juice on CPU tongue.gif
e-jump
post Feb 18 2006, 12:21 PM

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im having a feeling telling me that this 2gb kits is stressing the mem-controller hard =__=
but an increase of vcore didnt help much..
i'll wait for a new mod bios to try on later
zogenk
post Feb 19 2006, 12:27 PM

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anyone can tell me what the problem with my rigs..
running SuperPI 1M, SP2004 all error..

user posted image

gr2000
post Feb 19 2006, 12:32 PM

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ur CPU not enough juice
raise ur vCore

btw..what are your RAM settings?

This post has been edited by gr2000: Feb 19 2006, 12:33 PM
zogenk
post Feb 19 2006, 12:34 PM

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actually i'm trying to check the highest oc without raising vcore..
my ram timing 3-4-4-10 at 2T

This post has been edited by zogenk: Feb 19 2006, 12:35 PM
gr2000
post Feb 19 2006, 12:36 PM

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what RAM u using?

and remember to raise ur vCore
i'm suprised your proc can even boot to desktop with 9x280 @ 1.376v
zogenk
post Feb 19 2006, 12:40 PM

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the highest with stock vcore is 310x8 actually, but only around 10 min. and restart..
i'm using Hynix TP-D43 single channel..
mobo Infinity Ultra
PSU CoolerMaster Real Power 450w

This post has been edited by zogenk: Feb 19 2006, 12:42 PM
IO Guy
post Feb 19 2006, 12:41 PM

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QUOTE(gr2000 @ Feb 19 2006, 01:36 PM)
what RAM u using?

and remember to raise ur vCore
i'm suprised your proc can even boot to desktop with 9x280 @ 1.376v
*
Maybe E3 can do this trick...... tongue.gif



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gr2000
post Feb 19 2006, 12:41 PM

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QUOTE(zogenk @ Feb 19 2006, 12:40 PM)
i'm using Hynix TP-D43 single channel..
mobo Infinity Ultra
PSU CoolerMaster Real Power 450w
*
try 3-4-4-8 for ur RAM timings..
but firstly..just raise the vcore and see how it goes
zogenk
post Feb 19 2006, 01:05 PM

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-edited-
already know what the problem..


This post has been edited by zogenk: Feb 19 2006, 05:25 PM
kurikuraX
post Feb 20 2006, 11:50 AM

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Wow..can reached above 300!! Nice proc u have there! notworthy.gif
kanethesun
post Feb 21 2006, 12:38 PM

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ahh, I've got some problem to ask regards to my A64 system.
I'm using KVR DDR 512mbx2.
I can boot to windows at about 240 Mhz for divider 1:1
but when I use divider for 133 / 100, my frequency cant even reach 200.
is this my RAM limit when using divider? or is it relate to the memory controller?
I hope I not confusing anyone and hope you all understand what I'm asking and give me the solution either its my RAM limit or my bad memory controller biggrin.gif

TSsoulfly
post Feb 22 2006, 03:27 PM

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QUOTE(e-jump @ Feb 18 2006, 12:21 PM)
im having a feeling telling me that this 2gb kits is stressing the mem-controller hard =__=
but an increase of vcore didnt help much..
i'll wait for a new mod bios to try on later
cannot expect much from a winnie

E6 should handle 2GB easier i think
linkinpark
post Feb 27 2006, 06:40 AM

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Cpu-z and CPID both give different reading revision and code name on my newly bought AMD proc. Which 1 is correct Venice or Manchester , E6 or E4?
PCcrazy
post Feb 27 2006, 08:08 AM

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QUOTE(linkinpark @ Feb 27 2006, 06:40 AM)
Cpu-z and CPID both give different reading revision and code name on my newly bought AMD proc. Which 1 is correct Venice or Manchester , E6 or E4?
*
http://forums.amd.com/lofiversion/index.php/t67425.html

Check link above.
ZipD
post Feb 27 2006, 01:40 PM

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I'm new at AMD o/cing. I'm trying to figure out what is what, so far here's what I've learned:

HTT is 200 (default for AMD64 processors)
HT Multiplier or LDT Multiplier is 5 (default for AMD64 processors)

HTT x HT = FSB
200mhz x 5 = 1000mhz (this should never exceed 1000)

CPU Multiplier is 9 default for Winchester
CPU Multiplier x HTT = CPU Clock
9 x 200mhz = 1800mhz (default for AMD64 3000+)

I know that the HTT, HT, CPU Multiplier can be upped. However, I do not understand the memory divider and how it relates mathematically to overclocking. Can someone please explain this and give an example?

Thanks.
seeseng
post Feb 27 2006, 01:55 PM

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QUOTE(linkinpark @ Feb 27 2006, 06:40 AM)
Cpu-z and CPID both give different reading revision and code name on my newly bought AMD proc. Which 1 is correct Venice or Manchester , E6 or E4?
*
I think yours is the new E4 Venice that crippled down from Manchester. I heard some forum said AMD take those X2 Manchester that failed/problem 1 core to diable 1 core to make it into single core E4 Venice to save money. Dunno true or not.
e-jump
post Feb 27 2006, 02:08 PM

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QUOTE
I know that the HTT, HT, CPU Multiplier can be upped. However, I do not understand the memory divider and how it relates mathematically to overclocking. Can someone please explain this and give an example?


the memory deviders works are refered to stock htt..
say, in the bios menu, im sure you can find memory speed, whith selection of 200,166,133,100 [for dfi n some mobo, theres 183 n 150]
so, if u choose 200, the devider will be like 200[htt]:200[ram], that means ur ram speed are sync to cpu htt.. if u up cpu htt250, means u run ur ram at 250mhz[ddr500]
so it goes 200:166, 200:100 etc deviders, ram run slower than cpu htt
ZipD
post Feb 27 2006, 03:26 PM

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QUOTE(e-jump @ Feb 27 2006, 02:08 PM)
the memory deviders works are refered to stock htt..
say, in the bios menu, im sure you can find memory speed, whith selection of 200,166,133,100 [for dfi n some mobo, theres 183 n 150]
so, if u choose 200, the devider will be like 200[htt]:200[ram], that means ur ram speed are sync to cpu htt.. if u up cpu htt250, means u run ur ram at 250mhz[ddr500]
so it goes 200:166, 200:100 etc deviders, ram run slower than cpu htt
*
So if I'm using a DDR400 ram, which divider should I use? I intend to o/c my CPU up to 2.4ghz (currently at 1.8ghz).

Here's my current rig:
AMD64 3000+ (winchester)
4x256MB HyperX DDR400
Asus A8N-SLI 939pin

UPDATE:
I found out this:
CPU Clock / Memory Divider = Memory Clock
1800 / 9 = 200 (default for DDR400)

Now if I would to up my CPU to 2400mhz,
I take the intended CPU Clock and divide it by the CPU Multiplier of 9 (I will assume that this multiplier is locked),
2400mhz / 9 = 266mhz which is the HTT

With HTT at 266mhz, I would need to reduce my HT Multiplier because at the default of 5, it would exceed the 1000mhz limit (266 x 5 = 1330mhz) and will be unstable.

So I'll reduce the HT Multiplier to 3,
266mhz x 3 = 798mhz (well below the limit)

Now, for the memory divider, I know I should also reduce it because now its currently at 1:1 (HTT:Memory Clock) ratio. Because if I don't,
266:266 would make my memory operate at 266mhz which is too much for a DDR400 RAM (should be 200mhz or below).

Theoritically, I should divide the new CPU Clock by 12 to get this,
2400mhz / 12 = 200mhz (which is the memory clock of my DDR400 i.e. would be stable).

From your example above, I cannot figure out how to get this 12. Anyone?

This post has been edited by ZipD: Feb 27 2006, 03:50 PM

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