Abit NF7 Overclocking Problem????

Hello,

I've overclocked my new Barton XP2500-M upto 2.3GHz using a 200Mhz FSB, with a 11.5 mulitplyer, but i'm not satisified! I've read on another forum that the optimum mulitplyer is either 10 or 10.5 for the Abit NF7 motherboard, but when I use this setting it requires a FSB of around 220MHz.

The problem is that when I increase my FSB higher than 200MHz the computer becomes unstable, it boots but then pretty much immediately resets and then keeps on resetting. Any Ideas how I can get the FSB up above 200MHz?

Im using an old case and I suspect that PSU isn't all that brilliant, however, I've checked the voltages in the BIOS, and with MBM 5, and the +12V, +3.3V and +5V are all around 0.1 or 0.2V above.

Cheers

Abit NF7 v2.0 Motherboard
Barton XP2500-M Processor (currently at 2300GHz)
Giel Value 512MB DDR PC3200
Coolermaster XDreamII Cooler

 

I assume you've got nominal temps for that processor? I wouldn't trust the mobo's onboard sensors too far, they're not exactly accurate but they'd give you an idea at least.

I don't know if its the same for the NF7, but on my AN7 there is a setting called "CPU Interface", I find that you gain stability by diabling this and leaving the FSB:Ram ratio on auto.

Also, have you tried messing with memory timings? You shouldn't need to with that RAM, but its worth a try at least.

Have you tried upping the VCore slightly to gain stability over 200MHz FSB? As long as your cooling is alright, this should help.

 

What exactly are you runing mem timings voltages? etc.........

 

I had this problem with my NF7-S running over 190fsb.Try raising the chipset voltage to 1.6V.That fixed it for me.

 

I've now got the FSB to 215MHz, with a 11.0 multiplyer. Temps are at 39 idle, 45 (ish) after an hour of playing CS.

The CPU core voltage is at 1.7V, the DDR SDRAM voltage is at 2.8V and the memory timings are 11 - 3 - 3 - 2.5 (don't know too much about memory timings to be honest).

Voltages in the BIOS, and on MBM 5, say that the +12V, +5V and +3.3V rails are all around 0.1V - 0.2V over specification (not bad from an old noisy PSU from a old cheapish case!).

I don't think my set up, as it is, is going to get any higher. How can I tell what the limiting factor is in my system? Is this likely to be the max output of the CPU and motherboard or is the memory holding me back?

I've got 3DMark 3 downloading at home - will this tell me?

Cheers!

 

To check if its the memory, try memtest86.

3DMark will just tell you if your system is generally stable if you loop it and see if its bluescreens over a few hours.

 

Honestly.. i didnt satisfied with abit's BIOS at all coz .. they didn't offer to disablin the ECC for procs L2 cache.. (since ECC could impact lost performance atleast 2% or something)..

currently... im using NF7 v2 with the latest BIOS from its manufacture web base... eqquiped w/ barton 2.8Ghz+ (be4 OC) and 512(x2)MB KingMax PC3500 2-3-3-2 (under-timing) ... GrapCard:MSI GeForceFX5200 128MB DDRSDRAm....

since the barton core (for 2.8+) FSB is actually 333MHz...

i've been succesfully (means stable and satisfied w/ temps) push it over 202Mhz for its FSB (202 x 11 = 2222Mhz ~ 3.2+Ghz).. with 82Mhz for its AGP bus speed... and 2-3-3-2 memtimings...

ive spending almost 1 hour to succesfully finding the solutions for its mems problems.. and the answer for its problems was to change the slot of mem pieces from slot 3 + slot 2 (as abit recommendation) into slot 3 + slot 1 ...(as Im refering to SisSandra...)

 

currently.. im doing a new test system for OC on abit NF7 board... you know... a few minutes ago, I've successfullly ramp up its FSB untill 225 without any disfunctionin system failure (even blue screen). but a few minutes later after executing stressing burning applets from SisSoftware 2003 program... suddently, blue screen show up!.. soo, after doing some investigation, im aware its actually caused of over-temp on both CPU (60) and northbrige-chipset (34) cooling problems.. (since i dont have water-cooling stuff) so.. looking ahead for more cooling stuff improvement

Some tips to get 225 FSB:
1. Make sure your CPU multiplier is unlocked version
2. Lowering down the Multi to 10.0
3. Set the Vcc to 1.725
4. Put your ram in order of slot 3 + slot 1 + slot 2...

Good luck

 

Folks! Todays i've succesfully get into the highest FSB ever ... 230Mhz! with 9.0 multiplier...

anyway... still dont know much about its improvement and how far its performance...

will be back with more information about this later.. cya soon!

 

From what iv heard the NF7-S is the best CPU overclockable mobo you can get iv seen peeps get 3Ghz on thare mobile barton cores ( with water cooling or better ) but it tends to be about average when it comes to FSB overclocking .... and i know from expereance that the DFI Infinity NFII is the best FSB overclocking mobo ( at least that iv seen / tryed ) Im running 500 FSB and iv seen peeps hit 300/600 with voltage mods yes 600 FSB ! So if ya have a NF7-S i whould go for more core speed then FSB.. Iv tested and benched till i was blue in the face a hi FSB speed just dosent make as big of a boost on speed as you whould think it whould.... IE. a 10 MHz FSB OC gives you less performance boost then a 100MHz CPU OC And in all of my testing ( on socket A mobos ) raising the FSB did not effect CPU stibility only memory ..... IE. if a CPU can run 2.6 GHz at 200 FSB then it should run 2.6 GHz at 500 FSB IF the chipset can take it ..... Iv never seen a socket A CPU that i had to drop the core speed on to get a higher FSB speed......

 

NF7 Vdim only get 2v9 you have to mod it upto 3v3 or more to get higher FSB for ram and CPU (1/1)
control CPU t* by WC as Ace 256 said.

 

is it possible not to lowering down its multiplier and to use hi-FSB without increasing its Vcc core? coz im just using stock cooling parts (Cpu HS and modded NB HS).. thats the problems i guess,...

regards!

ps: please help me and give some hints to OC'ing my system better. Thanks in advance

 

You can be down Ratio and get higher FSB without changing Vcore except ram can not get that FSB. if you used PC3200 and it can not be raised VDim.

 

ist ratio means the multiplier?

im using PC3500/DDR433 from KingMax (claimed as Super Ram Version with best value).. so far .. raise the Vdimm till 2.9 and i've test it... able to handle 238 Mhz without any cooling parts on the RAM chip set...

 

multiplier=ratio
that's a good new for kingmax PC3500, and no need heatsink ram for it at 2v9 or over, what about timmings ? then you test it stable or not....

 

timing for RAMs is 2.5-3-3-7... because im using dual channel mode of DDR rams on board with the size of 1024 Mbytes (512 x 2 pcs)

so far... the RAMs could handle the stress untill 244+Mhz (488) -BIOS bootable- .. but unforutnately... the real probs here about the barton core temperature! ... thus the XP cant handle it... end up with hang during windows start up...

 

try at 2.5 4 3 7 or 2.5 4 4 8 or so far 3 3 3 7.

 

will try it later fella.... but first, have to think where to find $30 for water pump... damn.. soo expensive!

ps: water pump with 4800 liter per hour... for about $30 bucks... what do you think???

 

4800 liter/hour pumper is verry good for 12mm pipe, I have been using 4000 liter for 12mm pipe it is still good, 30$ woo it is so expensive, if you use 4800 for CPU, VGA, and chipset with 10mm pipe, I think it is better.

 

yea.. i think the pipe is 10mm... ( i dont know but i just guess).. anyway, im just building WC for the processor... yet, its still under construction... hehe

 

right, I am Waiting Some pictures from your Score

 

Will post the pictures later fella... but im afraid it's not soo good as you are... hehe

 

got some question about WC... do we need to mix some special liquids wit the water in order to keep it even more cooler? or just simply put in pure H20 with any mixture...

 

I have been using water only, copper radiator with 4 full fan at 0.63a 5500rpm, for 2 side. What about your computer system.