Descrease Hyper Transport for extra OC ???

[paadness]

When a friend of mine told be he was talking his 1.8 Ghz A64 to 2.4 Ghz on VIA KM800 Chipset, i did not believe him. He has an ASUS K8S i think. I had an K8V Deluxe which went no further than 220 MHz, how can he go upto 260 MHz.

What he said was "I decreased Hyper Transport to 400 and could get upto 260 MHz"

I dunno WTF is happening, may be i have SATA and he has IDE.

But is that too good to be true?

 

[SolMiester]

I have heard 300 FSB is not impossible, however some boards dont like going over 1000HTTx2, therefore decreasing the ratio from 5 down to 4, will allow a FSB of up to 250, down to 3x and you can go up to 300+. With your SATA drive, you have to be careful what bus its on as some boards start corrupting the data on the disk when clocking.

 

[theMan]

yes. its probaly sata. without a lock, thats usually where the sata controller fails. but, you never want the hypertransport to go over 1000mhz otherwise its not stable.

 

[MDme]

If you are using SATA ports 1 or 2 they are not locked and become unstable when you OC the fsb. try using SATA ports 3 or 4. also, it is true that using a lower HTT multiplier will allow higher FSB OCs. as long as the total of the FSB and HTT multiplier is less than 1000 you should be okay. some older A64s actually prefer < 800 for the total HT frequency. so you may want to take that into mind.

 

[Markfw]

K8V I think is socket 754 KT800, with NO PCI lock. Thats probably the problem.

 

[paadness]

Overclocking corrupts the hard disk.

Well, does NVDIA Nf 3 250GB support Sata Lock??

My problems will be solved if i can get an S-939 Mobo with AGP support.

 

[SolMiester]

My board is an AGP, Nvidia chip board for S939, though havent tried an OC over 250

 

[Pabster]

Best way to get around that is to go SCSI. Most of the SCSI adapters can take the higher PCI frequency with no trouble and you won't have to worry about data corruption

 

[imported_michaelpatrick33]

Originally posted by: Pabster
Best way to get around that is to go SCSI. Most of the SCSI adapters can take the higher PCI frequency with no trouble and you won't have to worry about data corruption

Or just get a pci locked motherboard and use sata or ide. Though 15000rpm root drive does sound tasty.

 

[imported_whatever]

There are plenty of mobos that will hit 260MHz FSB. My EPoX 8KDA3J hits 330 or so in fact (with 3x)

 

[imported_wyrmrider]

theoretically with the stock 5x multiplier on later boards you should not overclock at all as 200x5= 1000= 400ddr

see theman's post and this
quote:
Originally posted by: Zebo
1. Max HTT/FSB should be first ..*only works if motherboard has locks. Most A64 boards do today. Sata 1 and 2 are not locked on some nforce mobos use 3 and 4.
-set CPU multi to 6 or 7, this will take CPU out of equation
-set memory to SPD and 100, this will take memory out of equation
-Increase HTT/FSB up until you fail to boot or there abouts, back down 5%, (HTT * 0.95), this is your max safe HTT.

2. Max Chip capable
- Set multiplier to it's maxium
-Set vcore to 1.6 -1.65 for 130nm chips, 1.50-1.55 for 90nm chips
-Set mem to SPD and 100, this will take memory out of equation
-starting with HTT 200 raise in about 5Mhz increments up to boards max found earlier or until you start failing PRIME95 which will probably happen first..only give it 5 minutes max, that's good enough for now.
-At the point it starts failing within that 5 min time period, back down 5%, (CPU MHZ * 0.95), thats your max CPU speed, now test prime again at 95% for 12 hour for stable.
Prime 95 Link http://www.mersenne.org/freesoft.htm

3. Memory MAX

It depends what you want and type of mem you chose, LL or Bandwidth but must keep 1T (command rate) because A64 suffers big time with 2T.

-For high bandwidth set mem setting to 200 and 2.5-4-3-7 1 T and give it boards max volts, or for LL set mem setting to 200 and 2-2-2-7 1 T and give it boards max volts. (up to 2.9Vdimm is safe with all ram) ( Caution DFI/ABIT users -- do not exceed 3.0V unless you know what you are doing!!!)
-Set CPUs multi to 6-7, again to take it out of equation.
-Raise HTT up to boards max or until you start failing memtest86 test 5 and 6 http://www.memtest86.com/
-When you start failing memtest86 test 5 and 6, back down 5%, (HTT * 0.95), thats your max MEM speed.



That should help you out.

 

[Concillian]

Originally posted by: Pabster
Best way to get around that is to go SCSI. Most of the SCSI adapters can take the higher PCI frequency with no trouble and you won't have to worry about data corruption

Dude, it's WAY cheaper to just get a motherboard that supports AGP/PCI locks, like any nForce3 board. I mean SCSI drives are quite expensive, and a new mobo is less than $100.

Also, it's not too much higher before the video card will also start having problems.

Indeed, OP, your problem is the lack of AGP/PCI locks.

 

[bjc112]

You can drop the overall HTT so low it almost doesnt matter..

Keep it above 600 (1200 effective) and there is almost ZERO performance difference.


If you don't have a PCI/AGP lock, your basically fvcked..

I have no problem hitting 300+ on my Neo2, I max out around 315 though..

Duvie has pusehd 353-355 with absolute stability..

 

[paadness]

Damn, i wrote alot of things and WTF, "you have censored words" everything got erased.

So to put is quickly, im buying a DFI for $ 106. Is it as reliable as ASUS or Gigabyte models. Also, what about its puny little heatsink, apparently smaller than my balls

 

[Insomniak]

Um, duh?