4200 overclock advice

[J273]

Ive just bought this chip ....Upgraded from a opteron 144 which i had @ 2.4ghz

id like to clock this chip a little to say 2.6 if possible

Im running a dfi lanparty

If i change the

FSB FREQ = 240

LDT /FSB = X3

CPU / FSB = X11

And up the vcore to 1.4

what would i need the ram divider set too?

3/4

Thanks

 

[J273]

Ooops ive just realised ive posted this in the wrong forum

could a mod please move it to the overclocking section?


Thanks

 

[nheather]

The RAM dividers for AMD Athlons do not exactly match the expected ratios and they change depending on the CPU multiplier used.

For a 11x multi the AMD memory dividers are

200 (1:1) - actually 11:11
180 (9:10) - actually 11:13
166 (5:6) - actually 11:14

What setting you use depends on what your memory can handle.

In your example

200 - Memory speed = 240MHz
180 - Memory Speed = 203MHz
166 - Memory Speed = 188MHz

I would guess that 240 is too high unless you have very good memory.
203 would be fine but many MBs (mine included) don't support 180 dividers.
Which would leave you stuck with 188MHz

Cheers,

Nigel

 

[BigglesPiP]

1st you want to get the latest CPU-Z.

With a low multi you'll hit the limits of the HTT (anywhere between 1066 and 1333 depending on the board) before the chip, then you'll have to lower the LTD multi to continue up with the FSB.

 

[Sean_UK]

Should be good for 2.75Ghz 99% of the time (250x11) on stock volts, drop the memory down a tad to find out and make sure the HT set to 3x or 4x. Ive put plenty of s939 x2 4200's in PC's of late and all managed 2.75 or better. Edit; caution though as they get hot even at stock volts when o/c, unless theres some decent aftermarket cooling on-top.

 

[J273]

Should be good for 2.75Ghz 99% of the time (250x11) on stock volts, drop the memory down a tad to find out and make sure the HT set to 3x or 4x. Ive put plenty of s939 x2 4200's in PC's of late and all managed 2.75 or better. Edit; caution though as they get hot even at stock volts when o/c, unless theres some decent aftermarket cooling on-top.

Great thanks guys...ill give it a try in a bit

Sorry a bit new to this...does anyone know what HT is labelled under on a dfi board

Thanks

 

[J273]

Also what divider would i need with 250 x11?

Thanks

 

[MoD_Callidus]

Hi mate,

Sorry I know squat about DFi's but I'm running an X2 4200 in my SN25P shuttle

250 FSB x 11 multi
3 x HTT
166 Divider < s'what ya want

gives me 2.75 and I'm limited as I'm at the fsb is at it's max grr lol and yes these do clock well but get toasty. mines idling @ 33 on one core 35 on t'other

but that's with stock shuttle cooling. this cpu could defo do more in another board / cooler combo. I'd guess at 3.0 with a good air cooler

 

[SkeeterUK]

The RAM dividers for AMD Athlons do not exactly match the expected ratios and they change depending on the CPU multiplier used.

For a 11x multi the AMD memory dividers are

200 (1:1) - actually 11:11
180 (9:10) - actually 11:13
166 (5:6) - actually 11:14

What setting you use depends on what your memory can handle.

In your example

200 - Memory speed = 240MHz
180 - Memory Speed = 203MHz
166 - Memory Speed = 188MHz

I would guess that 240 is too high unless you have very good memory.
203 would be fine but many MBs (mine included) don't support 180 dividers.
Which would leave you stuck with 188MHz

Cheers,

Nigel

Hmm is this true. As i have overclocked my x2 3800+ with geil 2gb value dd400 ram and when i overclock it to 2.6ghz my ram in cpuz says its at 173 on a divider cpu/15 so if its not that what is it. Cos when i oc it more orthos fails or memtest windows version gives errors. I presumed it was underclocked cos its not 200 (ddr 400) but at the mo i thought it was 173 (ddr 346) If thats not right then what would a 166 divider do. Just very confused here.

multi 10
fsb 260
volts 1.45 (1.475 in bios asus undervolts it)
htt 3x (bout 700 ish i think when oc to 2.6ghz)
mem 173 using cpu/15 divider 2.8 v 2.5-3-3-8 1T timings
asus a8v deluxe rev 2.0 version on 1014 bios.

37 idle 60 in orthos, gaming i guess 57 ish

--

Hmm did a everest mem benchmark and its defo not going near 200mhz so is defo underclocked so the above poster at least for my oc is inaccurate. As 200mhz or near would be more than 5200 5200 5100 type scores more like 5900 5900 5800 or more

 

[J273]

Hi mate,

Sorry I know squat about DFi's but I'm running an X2 4200 in my SN25P shuttle

250 FSB x 11 multi
3 x HTT
166 Divider < s'what ya want

gives me 2.75 and I'm limited as I'm at the fsb is at it's max grr lol and yes these do clock well but get toasty. mines idling @ 33 on one core 35 on t'other

but that's with stock shuttle cooling. this cpu could defo do more in another board / cooler combo. I'd guess at 3.0 with a good air cooler

Thanks matey...Ill have to try these settings

Im running a freezer 64pro which is rated upto a 5000+...so hopefully ill be ok

 

[MoD_Callidus]

Let me know how you go on fella, here are some screenies from everest displaying my current settings. I''ve found 2640 to be a nice balance of stability and yet retaining decent temps

I'm well chuffed as I only paid £45 incl del lol

best of luck

 

[J273]

Let me know how you go on fella, here are some screenies from everest displaying my current settings. I''ve found 2640 to be a nice balance of stability and yet retaining decent temps

best of luck

Top man....Thanks for that

Ill post back with the results in a bit

 

[J273]

Ive just put them setting in....Im showin 2751Mhz

With a bus speed of 250

how come mines showing a different speed to yours matey

 

[J273]

Im gonna do a bit of stress tesing in a minute with sp2004

Only problem im seeing is on the DFI boad the sensor PWM Ic which i believe to be Motherboard temperature is showing 55 - 60 deg idle

ill see how far it goes whilst stress testing

 

[SkeeterUK]

snip*

Ive just put them setting in....Im showin 2751Mhz

With a bus speed of 250

how come mines showing a different speed to yours matey

Your using 250fsb as you said. 250*11=2750.

He probably used 255 fsb to get 2.8ghz

 

[MoD_Callidus]

Wooo job's a good un

diff speeds due to diff FSB's mine was lower than yours, I'm now at 2.8 and happily staying there. my fsb is currently 255

 

[J273]

Just ran the sp2004 stress test but it halt's after 1 min 15 secs on both cores

think i may have to lower my fsb a little....Ive set the vcore to 1.3 which i beieve is stock for this chip....do you think that could be the reason for it doing this not enough power causing it to stop

I left it at 1.3 thinking this would keep the temps down....I may bump it up a little to say 1.425 and stress test again.


the only thing is the PWMIC temp on the dfi mobo its really high,cpu temp seems ok so does the chipset its just this temp.

Does anyone with a dfi board have any ideas as to what could be causing this ?



Im slowly getting the hang of this guys

Thanks ........MoD_Callidus,SkeeterPSA,Sean_UK for the help advice

Much appreciated.

 

[SkeeterUK]

Stock temp is from 1.35 to 1.4 as stated by amd's website. Totally safe (as long as temps dont go too high) at 1.45-1.5v max. Temps should be ok up to 70 but obviously try to keep between 55-65 as the highest you want.

 

[Sean_UK]

Im showin 2751Mhz

Try 1.375, if it still fails then 1.4v, either volt setting should make it stable for sp2004 tests @ 2.75ghz. Whats the temps like btw, keep below 65c (pref no more than 55 to 60c), coz these 4200's in my experiance dont like the toasty end of temps.