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x2 3800 Owners - OC's
- Thread starter HungryHippos
- Start date
- Joined
- 25 Mar 2004
- Posts
- 16,021
- Location
- Fareham
ht frequency doesn't really effect performance at all, it's just you need to keep it's total value below or on 1000. ht frequency multiplied by HTT gives you a total. For example ht of 5x and a HTT of 250 will give you 5 * 250 = 1250. but by reducing ht frequency to 4x you'll hit exactly 1000 which is stable 
So in short you can use ht frequency at 4x at anything up to 2.5ghz on these chips, as long as you're upping the HTT and leaving the multi at 10. IF you drop the multi and raise the HTT above 250 then you'll need to lower the ht frequency to 3x.
Example of the above with an ht frequency of 4x
250 * 10 = 2500mhz cpu speed, but also gives us 4 x 250 = 1000
300 * 9 = 2700mhz cpu speed, but would give us 4 x 300 = 1200
so to correct the 2nd equation you'd need to set ht frequency to 3x giving :
300 * 9 = 2700mhz cpu speed, and 3 x 300 = 900
To spluff, 9.5 * 1500 is mathematically impossible for your clock speed, need clarfication, and an important note to all AMD overclockers :
NEVER use a multi which isn't a whole number, multi of 9.5 will reduce performance, multi of 9 or 10 is way more preferable even at slower clocks.
So in short you can use ht frequency at 4x at anything up to 2.5ghz on these chips, as long as you're upping the HTT and leaving the multi at 10. IF you drop the multi and raise the HTT above 250 then you'll need to lower the ht frequency to 3x.
Example of the above with an ht frequency of 4x
250 * 10 = 2500mhz cpu speed, but also gives us 4 x 250 = 1000
300 * 9 = 2700mhz cpu speed, but would give us 4 x 300 = 1200
so to correct the 2nd equation you'd need to set ht frequency to 3x giving :
300 * 9 = 2700mhz cpu speed, and 3 x 300 = 900
To spluff, 9.5 * 1500 is mathematically impossible for your clock speed, need clarfication, and an important note to all AMD overclockers :
NEVER use a multi which isn't a whole number, multi of 9.5 will reduce performance, multi of 9 or 10 is way more preferable even at slower clocks.
Suicide run@ 2.75GHz (super PI of 32.578 seconds)
275x10
Manchester
1.5v
Ram at 250MHz 2.5-3-3-7
Don't think I have done a good jobof seating my heatsink (Zalmon 9500) it idles at 38 degrees stock and around 48 with this overclock.
275x10
Manchester
1.5v
Ram at 250MHz 2.5-3-3-7
Don't think I have done a good jobof seating my heatsink (Zalmon 9500) it idles at 38 degrees stock and around 48 with this overclock.
Last edited:
Here's my Info.
Clock - 2500
HTT - 250
RAM FSB - 208
Timings - 3,3,3,8 1T
VCore - 1.45
HT - 3x
Core - Manchester
Cooler - Air - Zalman 9500(LED)
Stable - Yes
Mobo - MSI Neo2 Plat
Will do 2700 but not stable
. RAM is holding me back, but some PC4000 ordered and on the way.
[EDIT] Temps , Idle 29C , 100% load on both cores 44C [/EDIT]
Clock - 2500
HTT - 250
RAM FSB - 208
Timings - 3,3,3,8 1T
VCore - 1.45
HT - 3x
Core - Manchester
Cooler - Air - Zalman 9500(LED)
Stable - Yes
Mobo - MSI Neo2 Plat
Will do 2700 but not stable
. RAM is holding me back, but some PC4000 ordered and on the way.[EDIT] Temps , Idle 29C , 100% load on both cores 44C [/EDIT]
Last edited:
Soldato
- Joined
- 10 Apr 2004
- Posts
- 13,498
Currently fighting this Toledo 3800+
248x10, 166 divider, 1.55V, 2-2-2-6-8-12 = 2.9V - Stable - Sli-DR
got more voltage to go! 2.6ghz is my target!
Edit: .5 multis put a mem divider on AFAIK.
Conc
248x10, 166 divider, 1.55V, 2-2-2-6-8-12 = 2.9V - Stable - Sli-DR
got more voltage to go! 2.6ghz is my target!
Edit: .5 multis put a mem divider on AFAIK.
Conc
Soldato
- Joined
- 20 Apr 2004
- Posts
- 4,431
- Location
- Rugby
KillBoY_UK
2300MHz
HTT 230
2Gb Corsair pc3500LL @ 2.5-3-2-6 1T
Vcore 1.424V
HT 4X
Manchester bh-E4 core
XP120 coolmaster 40cfm Ultra Quiet fan
Folding at home stable for over a week 100% useage on BOTH cores 60c temp
M/B DFI nForce 4 SLI DI
2300MHz
HTT 230
2Gb Corsair pc3500LL @ 2.5-3-2-6 1T
Vcore 1.424V
HT 4X
Manchester bh-E4 core
XP120 coolmaster 40cfm Ultra Quiet fan
Folding at home stable for over a week 100% useage on BOTH cores 60c temp
M/B DFI nForce 4 SLI DI
- Joined
- 25 Mar 2004
- Posts
- 16,021
- Location
- Fareham
table updated, please fill in any question marks, i'm not psychic
- Joined
- 25 Mar 2004
- Posts
- 16,021
- Location
- Fareham
i'll allow suicide shots if you can at least run a super pi 1m test lol
note : i'd rather take a value you could use for every day use though, otherwise results could get skewed
note : i'd rather take a value you could use for every day use though, otherwise results could get skewed
Soldato
- Joined
- 20 Apr 2004
- Posts
- 4,431
- Location
- Rugby
Eulogy said:table updated, please fill in any question marks, i'm not psychic
RAM/FSB is 230
Soldato
- Joined
- 10 Apr 2004
- Posts
- 13,498
Okay update:
250x10, 166 divider (206mem??), 2-2-2-6-9-12, 1.55V, Stable, 4x HTT, XP-120 with YS-TECH 125CFM @ 5V. 40C load
, DFi Sli-D
Still pushing - that speed is stable.
250x10, 166 divider (206mem??), 2-2-2-6-9-12, 1.55V, Stable, 4x HTT, XP-120 with YS-TECH 125CFM @ 5V. 40C load
, DFi Sli-DStill pushing - that speed is stable.
My missing data:
3x mulitplier.
too early to say on stableness. Complete reinstall earlier, reseated the cpu heatsink. Really did a bad job last time (was my first ever non stock heatsink)
temp are much nicer, idling at 26 rather than 38 :s
Will do some clocking later.
3x mulitplier.
too early to say on stableness. Complete reinstall earlier, reseated the cpu heatsink. Really did a bad job last time (was my first ever non stock heatsink)
temp are much nicer, idling at 26 rather than 38 :s
Will do some clocking later.
Trial Run At 2.8Ghz
OK, Im giving her a trial run at 2.8Ghz, Mem at 254.6Mhz, 2-2-2-6, 1T
She failed 32M on Super-Pi on run 23, so shes almost there.
Im letting her fold tonight and will try again in the morning.
I had to up the voltage quite a lot
so I think Ill remove the IHS to stop her running too hot.
Voltage at 1.64 Load temp (2xF@H) 49-50c
She is deffinately destined for the Vapo with the IHS removed 2.9Ghz no probs.
Tom.
OK, Im giving her a trial run at 2.8Ghz, Mem at 254.6Mhz, 2-2-2-6, 1T
She failed 32M on Super-Pi on run 23, so shes almost there.
Im letting her fold tonight and will try again in the morning.
I had to up the voltage quite a lot
so I think Ill remove the IHS to stop her running too hot. Voltage at 1.64 Load temp (2xF@H) 49-50c
She is deffinately destined for the Vapo with the IHS removed 2.9Ghz no probs.
Tom.