what's holding me from hitting 2ghz with 1700+??

[jvang125]

ok i've seen plenty of people here hitting higher than 2ghz on their 1700+ but can't get mine past 1.9ghz. it runs stable at that but will reboot immediately when i try 2ghz. i'm currently running it at 12.5x152 (bios and xp sees it as a 2000+). if i decrease the multiplier (10 or 11) and increase the fsb (155 or more), i get a blue screen saying "out of sync". i'd reboot and everything returns to normal. hitting 2.2 or 2.3 would be lovely but 2ghz is FINE with me. any clues on what maybe holding me back? my specs are given below:

AMD XP 1700+ (12.5x152 @ 1.9ghz with 1.7v)
MSI kt7266 Pro A with latest bios version
Thermaltake Volcano 7
Kingston PC2100 512mb DDR
ATi Radeon 9500pro


cpu temps: idle 35, load 39
case: 34

 

[barrese]

What's the stepping of your chip? I'm having problems getting my 1700 over 2 Ghz too. I have a:

AXDA1700DUT3C 9429157270622
JIUHB0311XPMW


While I know the DLT3C chips are supposed to be better overclockers, I've read several reports of people with DUT3C chips gettin over 2.1 GHZ at default voltages. For some reason mine won't go higher than 1.9 Ghz at default 1.65v, 2 Ghz at 1.75v, and won't do anything higher at any voltage. I'm thinking chips from more recent production runs are not turning out to be good overclockers.

 

[Doh!]

Most people are running 2.2~2.3 because they're using nForce2 boards which have agp/pci locks. Does your board have this feature as well? If not, and your board only has 1/3 or 1/4 dividers then anything above 152 will be putting your pci above 38 (152/4) which most peripherals can't handle.

Also, you only have PC 2100 memory which may be holding you back from higher mhz.

 

[ChampionAtTufshop]

try a higher multiplier rather than a higher cpu freq for the reasons outlined above

 

[mjolnir2k]

Most likely it's the high FSB throwing your AGP/PCI bus out of whack causing you the problems.

If you can't lock down your AGP/PCI to 66/33 then you will hit the wall very quickly on FSB o/c ing. Also I think that 12.5 is the highest Multiplier that is available on the 1700 T-Bred B (unmodifed) version.

I have the same problem after I go past 180FSB (could probably get 1 or 2 more FSB mhz, but why bother)...Currently stuck at 2.25Ghz due to no lock after 166FSB. SIGH!

Still 780 Mhz over stock

ps. Your second bottleneck is your RAM

 

[bgeh]

it's your mobo and RAM
the MSI KT266 Pro 2 doesn't have the PCI lock, which will limit your overclock if your run it out of spec
your RAM is also limiting your overclock
one way to pass this limitation is to increase the multipliers and not the fsb

 

[barrese]

Anyone know what could be limiting my overclock. I have an Abit NF7 v2 board which I believe has a AGP/PCI lock, so that shouldn't be a problem. I have PC2100 RAM, but since the board allows me to run it at a different speed than the FSB, I'm only running the RAM at 133. Still, I can't get my darn chip over 2 Ghz (200x10).

Abit NF7 v2
AMD XP 1700+
Coolermaster HAC-V81 Heatsink
PNY 256MB PC2100 x2
ATI Radeon 9000
CPU temps: 50c w/ load (don't know how to get it down any more, I'm running with the side of the case off)

 

[ChampionAtTufshop]

it could be the cpu temperature
what is the northbridge temperature?
have you tried raising VDD? (NB voltage)

 

[Naruto]

You might be aiming too high of a fsb without any VDD voltage. Try to find if your cpu can go higher (by balancing a overclock between multiplier and fsb ie. 12x 180 = 2160mhz).

 

[sirfergy]

You can get an old Asus A7V. It runs my XP 1800+ @ 1.92ghz with a 19x multiplier.

 

[barrese]

Originally posted by: Naruto
You might be aiming too high of a fsb without any VDD voltage. Try to find if your cpu can go higher (by balancing a overclock between multiplier and fsb ie. 12x 180 = 2160mhz).

I didn't try upping the chipset voltage, never thought of it. I don't know what the northbridge is running at though because it doesn't have a sensor. It does have a fan on it though, so I'd think I could get away with upping the voltage at least a little. I did try getting over 2GHz with a lower FSB (like 166x12.5) but it wasn't any more stable. There seems to be something magical about 2 GHz on my chip. The only thing I can think of is having a low quality PSU.

 

[Doh!]

Having a low quality PSU will be a very good(probable) reason for an OC failure.