XP1800 11.5X166 stability questions.

[KingofFah]

I do not know much about overclocking, but I have read that you should have a lower multiplier for overclocking the FSB as high as possible. From what I read, it puts too much strain on the CPU running high multipliers and high FSB settings. Could someone confirm this for me to make sure I have it right? Will an XP1800 11.5 multiplier run stable at 166FSB? If it is too straining on the CPU at higher multipliers and FSB, then why would anyone want the higher unlocked multiplier settings?

Thanks for your time.

 

[sean2002]

I'd back off that FSB speedas it puts you PCI clock @ 41Mhzwhich is asking for data corruption. Also you do know that the multiplier is locked on a Athlon XP

 

[lamon]

i did the same question today here.

Well i think that with your multiplier it´s gonna be difficult to get such high fsb. i saw a site were the guy put the multiplier in 8x and 180 mhz of fsb = 1440 mhz.


but unlocking the multiplier is not a good thing to do. try with a xp 1500+ 10x multiplier.

i´m wondering that too.

Originally posted by: KingofFah
I do not know much about overclocking, but I have read that you should have a lower multiplier for overclocking the FSB as high as possible. From what I read, it puts too much strain on the CPU running high multipliers and high FSB settings. Could someone confirm this for me to make sure I have it right? Will an XP1800 11.5 multiplier run stable at 166FSB? If it is too straining on the CPU at higher multipliers and FSB, then why would anyone want the higher unlocked multiplier settings?

Thanks for your time.

 

[sean2002]

Do even attempt a 180FSB unless you know for sure that your MB supports a 5th PCI divider, it not theres a very good chanch you will corrupt the data on your hard disk

 

[jaybee]

Originally posted by: KingofFah
I do not know much about overclocking, but I have read that you should have a lower multiplier for overclocking the FSB as high as possible. From what I read, it puts too much strain on the CPU running high multipliers and high FSB settings. Could someone confirm this for me to make sure I have it right? Will an XP1800 11.5 multiplier run stable at 166FSB? If it is too straining on the CPU at higher multipliers and FSB, then why would anyone want the higher unlocked multiplier settings?

Thanks for your time.

It might if you increase the voltage and you have good cooling. Don't count on it though -- that's over 1900MHz.

jaybee

 

[KingofFah]

The Epox 8k3a says something about a 1/5 divider.

Finally, a 1/5 divider on an AMD based VIA chipset board

Finally before moving on the results we have to mention that the EPoX implements a 1/5 divider on the PCI bus when running over 166MHz, something that's been absent from many AMD boards and something that will appease the overclockers looking for a board that has no problems running at 166MHz and keeps PCI and AGP devices in spec.

From HEXUS.net

Would that take care of the problem?

 

[KingofFah]

The 8k3a has all the overclocking settings in the BIOS, including voltage. I would be using the HCC-002 CoolerMaster Fan, which has a copper heatsink and a 6800 RPM fan and is said to be good for OC'ing. jaybee, what if I did an XP1700 with 11X166 to the speed of 1826mhz?

Thanks for the help.

 

[jaybee]

Originally posted by: KingofFah
The 8k3a has all the overclocking settings in the BIOS, including voltage. I would be using the HCC-002 CoolerMaster Fan, which has a copper heatsink and a 6800 RPM fan and is said to be good for OC'ing. jaybee, what if I did an XP1700 with 11X166 to the speed of 1826mhz?

Thanks for the help.

I'd go for the XP1600+ -- in fact, I did. People are having good results with it, even better than with higher rated units it seems. Maybe just a statistical anomaly. Anyway, be prepared to unlock to get the maximum results. It's not difficult -- about like threading a needle, with 5 minutes of work & 15-20 waiting.

jaybee

 

[lamon]

sean2002 most of kt333 mobos have the 1/5 PCI divider. so it´s easy, at least in theory!

180/5= 36 mhz

 

[SickBeast]

I'm running my Athlon 1333 at 10.5x153fsb...if you're using the xp1800 with good memory and amazing cooling, I could see you hitting that speed. A tip...connect the L7 bridges when you unlock the chip...I was able to overclock a good 70mhz faster when I connected mine.

 

[KingofFah]

Thanks a lot guys, but I think I gave you the wrong idea about by OC'ing desires. I just want to hit 166, no more, no less. So what I am trying to figure out is what is the highest multiplier setting that will run 166 stable. 166/5 = 33.2 so no problem on pci. I just want the ram and host clocks matching. If I ever wanted to overclock more, then I would be looking for the responses I am getting. I know that 10.5x166 runs rock stable from reading a lot on the internet, but I cannot seem to find any info on the 11x166 or 11.5x166; that info is what I am looking for, from experience and knowledge of overclocking.

Please try to respond to this fast and check this post if you have responded, since I am going to be ordering a PC today and really need the info ASAP.

Thanks again.

 

[FluxCapacitor]

The closer you get to 1800Mhz the more "iffy" your results are going to be. Keep in mind 1800Mhz is 2200+ speed, so don't expect to get that out of every chip. (11.5x 166 = 1900MHz... 2350+ speed)

My 1900+ won't run at anything over 1733Mhz reliably, even with voltage at 1.85. Doesn't matter the FSB either (133 or 166+), but you hit 1733 and it just isn't happy.

I wouldn't get your hopes up for 11x or 11.5x at 166MHz FSB, since even with good cooling that might be asking too much. 11x might be possible if you get a good chip.

 

[Duvie]

Doesn't connecting the l7 bridges jack voltage up to 1.85v????

I would get a 1600+...you may have a good chance of running 166fsb w/o unlocking the multiplier....NO chance in hell IMO that you will with a 1800+...1900mhz is too high...

 

[KingofFah]

Thanks Duvie. I have been doing a lot of reading and think I am going to get an XP1600, only wish there was a bigger price difference between the xp1700 and 1600 hehe. Why is 1900mhz too high? Over the course of doing all that reading I see tons of 190 FSB overclocks using 10x multiplier, and one 207 FSBX10 overclock. BTW, what is the differenc between an unlocked XP1700 set at 10x and an XP1500?

Thanks again guys.

 

[Duvie]

If the unlocked 1700+ (1466mhz) is still et to run at default speed it means the lower multiplier allowed the fsb to be raised to 146 which trnaslates into increased sysem performance...The higher fsb means more bandwidth and higher memory speeds to take advantage of it....


Look at how 333mhz ddr improves very little over decent 266mhz ddr when left on a board where the amd cpu is locked at 266fsb...The amd chip theoretically only creates 2.1gb/s of bandwidth which is what pc2100 (266mhz) can handle....pc2700 (333mhz) can handle 2.7 gb/s but a 266fsb amd chip wont produce it thus the wasted bandwidth....

the above 146fsb would mean a 292fsb or close to pc2400 (2.4 gb/s of bandwidth).....


It is in your best interest for performance to run the fsb up to 166fsb and couple that with 333ddr...

 

[KingofFah]

Originally posted by: Duvie

Look at how 333mhz ddr improves very little over decent 266mhz ddr when left on a board where the amd cpu is locked at 266fsb...The amd chip theoretically only creates 2.1gb/s of bandwidth which is what pc2100 (266mhz) can handle....pc2700 (333mhz) can handle 2.7 gb/s but a 266fsb amd chip wont produce it thus the wasted bandwidth....

the above 146fsb would mean a 292fsb or close to pc2400 (2.4 gb/s of bandwidth).....


It is in your best interest for performance to run the fsb up to 166fsb and couple that with 333ddr...

I already knew that part, but I do not get the first paragraph you said. You mean that the 1700 unlocked and set to 10x will be able to overclock the FSB more than the 1500 at 10x?

 

[Duvie]

NO....The 1500+ can possibly go further...ocing is a hit and miss game....

I thought you meant just leaving them at default speed but using a 10x multiplier....therefore 1700+ (1466) = 10 x 147fsb....1500+ (1333) = 10 x 133....