NF3 150 chipset --- set AGP to 67-68 MHz to lock AGP
Set HT/LDT multiplier to 2x
Should be able to scale HTT above 275 MHz. Depending on motherboard this may be less if using SATA hard drives.
Via KT800 --- Set HT multiplier to 3x
HTT can possibly scale to 220-240 MHz levels. Now AGP and PCI are not locked, so you will experience limitation in AGP card or in hard drive tolerance, often before CPU limitation is reached.
NF3-250 754 or 939 motherboards ---- Set AGP to 67-68 MHz to lock AGP and PCI buses
Set HT/LDT multiplier to 3x
Should be able to reach 275-300+HTT speeds *(I have noted with some Winbond CH-5 based memories that even using ram divider, HTT bus can not be scaled past 230-240mhz).
Via KT800Pro ---Set AGP/PCI lock to enable in bios if available. If not an option, refer to above KT800 recommendations
Set HT multiplier to 3x
Should be able to scale HTT to 250-270 MHz.
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MADShrimps )
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PlanetAMD64 :
Here is a list of what Athlon 64 CPUs are the best for overclocking at present:
Athlon 64 3000+ (Winchester & Venice Cores)
Athlon 64 3200+ (Winchester & Venice Cores)
Athlon 64 3500+ (Winchester & Venice Cores)
Athlon 64 3800+ (Venice Core)
Athlon 64 FX53 (All cores)
Athlon 64 FX55 (All cores)
Your core info can be found on CPU-Z found at the top of the guide
Just because your CPU isn't on the list, doesn't mean it can't overclock very well, it's just those CPUs are common for high overclocks, so socket 754 users don't worry, but I have to agree at present, socket 939 is the best for overclocking.
Not all CPUs are the same, some models run hotter than others (my friends who has a very similar setup to me has his CPU 8C hotter than mine, and his is bearly overclocked)
Core Guide:
Clawhammer: Moderate Overclocking Possibilities (Variable)
Sledgehammer: Moderate Overclocking Possibilities
Newcastle: Low/Moderate Overclocking Possibilities (Variable)
Winchester: Moderate/High Overclocking Possibilities
Venice: Moderate/High Overclocking Possibilities
Low: 200-300 MHz overclock
Moderate: Around 500 MHz+ overclock
High: 700MHz+ overclock
Remember: The more you overclock, the more chances of your system becoming unstable, to help make your system stable, add an extra small voltage to your CPU(AKA Vcore)/RAM
3. Overclocking
OK, now here's an example of an overclock:
AMD Athlon 64 3000 (Winchester S939)
Stock Speed: 1800MHz
Multiplier: 9X
*Remember to keep an eye on the CPU temp, try not to get it over 60C*
1. Enter your bios by pressing Del or F2 (Varies which each motherboard)
2. Set the HTT multiplier to 4
3. I'm using DDR400, so i'd lower it to DDR333 (or the lower the RAM number in the RAM:CPU ratio) to make the RAM more stable as the FSB goes up, don't forget at 250FSB, the RAM will be 400MHz again
4. Keep increasing the FSB by 3-5mhz and testing in between each increase
5. Unstable at 262 FSB
6. Increased CPU voltage by 0.025v and RAM voltage slightly
7. Stable
8. Keep increasing the FSB by 3-5mhz and testing in between each increase
9. Unstable at 267 FSB
10. Changed DDR Speed to DDR266 (because of the RAM being DDR400, over 250FSB it would run past DDR400)
11. Stable again
12. Keep increasing the FSB by 3-5mhz and testing in between each increase
13. Unstable at 282 FSB
14. Went back to last stable overclock (267 FSB), i feel this is a good enough overclock
Stable Overclock: 267 x 9 = 2400 MHz
Stock Speed: 1800 MHz
An overclock of 600 MHz