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how to overclock my new system

F

fluxquantum

Platinum Member
hello everyone,

i realize there is a sticky thread on how to overclock amd 64 processors but i am still confused after reading it. i have always been an intel man until now. my system is up and running with no issues. i would like to attempt to overclock but there seems to be so many variables involved like memory timings and HT. my system specs are in my sig. can someone kindly point out where i need to start? i've overclocked intel systems many times with much success but technology has changed since then. i would appreciate it if i can get some pointers. thanks. 🙂
 
FSB...240MHz @ 10x multiplier
CPU Vcore...1.475VDC
LDT multiplier...4x
Memory divider...DDR333 (5:6)
RAM voltage 2.7V

Reboot and test system with Prime95 using MAX heat for 5 min. If okay, then bump up FSB by 1MHz and repeat Prime test. When you fail Prime95, increase CPU Vcore to 1.5V and retest with Prime. Note the CPU temp when running Prime. It should remain below 56C. I would also limit the CPU Vcore 1.55V.

You may be able the run the RAM at DDR400 if your final FSB speed is under 250MHz.

The key is to use the lowest CPU Vcore and still maintain CPU temp under 56C. This setup should also pass Prim95 after 12 hours. I don't like to run the RAM slower than DDR333 speed.

If you have a good CPU, then you should be able to push the FSB up to +275MHz (10x multiplier at 1.55 CPU Vcore) with the RAM at DDR333.
 
Originally posted by: furballi
FSB...240MHz @ 10x multiplier
CPU Vcore...1.475VDC
LDT multiplier...4x
Memory divider...DDR333 (5:6)
RAM voltage 2.7V

Reboot and test system with Prime95 using MAX heat for 5 min. If okay, then bump up FSB by 1MHz and repeat Prime test. When you fail Prime95, increase CPU Vcore to 1.5V and retest with Prime. Note the CPU temp when running Prime. It should remain below 56C. I would also limit the CPU Vcore 1.55V.

You may be able the run the RAM at DDR400 if your final FSB speed is under 250MHz.

The key is to use the lowest CPU Vcore and still maintain CPU temp under 56C. This setup should also pass Prim95 after 12 hours. I don't like to run the RAM slower than DDR333 speed.

If you have a good CPU, then you should be able to push the FSB up to +275MHz (10x multiplier at 1.55 CPU Vcore) with the RAM at DDR333.
Click to expand...


thanks, furballi. that seems simple enough. i'm such a noob at this point. should i also keep my RAM timings at default (SPD)?
 
yes, just keep your ram timings at default, and run a divider. that way, you can see how fast you can push your cpu. dont give it more than 1.55v (temps permitting). i recommend following the sticky. its very safe, and better than someone just telling you exactly what settings you should use. just ask any questions you have about it.

the most important things are to drop the ldt to 3x (or set the ht freq to 600, that does the same thing), and set your pci lock.
 
Originally posted by: theman
yes, just keep your ram timings at default, and run a divider. that way, you can see how fast you can push your cpu. dont give it more than 1.55v (temps permitting). i recommend following the sticky. its very safe, and better than someone just telling you exactly what settings you should use. just ask any questions you have about it.

the most important things are to drop the ldt to 3x (or set the ht freq to 600, that does the same thing), and set your pci lock.
Click to expand...

okay, i am able to get the proc to 2.4 GHz stable. let me know if this makes sense before i overclock it some more.

Memclock index value - 200 MHz
CAS# latency (Tcl) - 2
Tras - 5T
Trcd - 2T
Trp - 2T
Twr - 2T
1T/2T Memory Timing - 1T

Hyper Transport Frequency - Auto (1x through 5x as options)
CPU Frequency - 240
PCI Express clock - 100 MHz
CPU Multiplier - x10
PCI Clock Synch Mode Auto (to CPU and 33.33 MHz are options)

i have no idea what i'm doing but i got it to 2.4 GHz and everything is at default voltages. any other advice is welcome. thanks!
 
PCI Clock Synch Mode should be at 33.33

you must have some sweet ram to do 240 2-2-2-5. you will need to loosen timings or use a divider when you go higher.

looks good. if you get instability, increase the vcore a bit.
 
Originally posted by: theman
PCI Clock Synch Mode should be at 33.33

you must have some sweet ram to do 240 2-2-2-5. you will need to loosen timings or use a divider when you go higher.

looks good. if you get instability, increase the vcore a bit.
Click to expand...

thanks, theman for your response. check this out. i am now at 2.6 GHz with the same settings as mentioned above. is this normal? i am running 3dmark right now and so far no stability issues. my score keeps going up though 🙂
 
Not a bad OC. I just got the Asus Sli board also, it is quite easy to oc.
It does automatically set dividers the higher you push HTT.

3000+ Winnie
Asus Sli Deluxe
Corsair TwinX-3200XLPro TCCD

Vcore: 1.52
280x9 @ 2.528
4x Multi

Good luck🙂
 
Originally posted by: qbackin
Not a bad OC. I just got the Asus Sli board also, it is quite easy to oc.
It does automatically set dividers the higher you push HTT.

3000+ Winnie
Asus Sli Deluxe
Corsair TwinX-3200XLPro TCCD

Vcore: 1.52
280x9 @ 2.528
4x Multi

Good luck🙂
Click to expand...

thanks! i am now able to get to 2.7 GHz but had to up the cpu voltage to 1.52. i'm assuming i can leave the memory voltage as is since i have no issues at this frequency.

 
Originally posted by: theman
wow, thats a nice oc. now give it 1.55v and see if you can get 2.8
Click to expand...

okay, i will give it a shot. LOL, i need to get a life. i have to get some dinner. will keep you posted.🙂
 
Have you run prime95? Or just 3dMark?

For stability testing, you really need to run prime95 along with memtest. Because the memory controller is on the CPU, overclocking the CPU overclocks the mem controller. Its best to use both to make sure your system is entirely stable.

Nice OC though!
 
Originally posted by: theman
nvm double post. the stupid connection cut off and i didnt think my message went through.
Click to expand...

oops sorry to hear that. real quick before i go. i pushed it to 2.8 with 1.55v but the system kept rebooting. do you think it's a memory setting? i'm very pleased with 2.7 at least.
 
Originally posted by: CheesePoofs
Have you run prime95? Or just 3dMark?

For stability testing, you really need to run prime95 along with memtest. Because the memory controller is on the CPU, overclocking the CPU overclocks the mem controller. Its best to use both to make sure your system is entirely stable.

Nice OC though!
Click to expand...

you're right....i need to run prime95 just to be safe. thanks for the tip!
 
try running a divider, set it to 166 ddr333. then see if you can get to 2.8. it would be insane if you could get that ram to do 280 at default timings. what are the entire specs on the ram? also, make sure your ldt is at 3x.
 
okay, i stressed the CPU and memory with prime95 for about a couple of hours and everything seems to be okay. my sweet spot seems to be at 2.7. in order to do 2.8, i may have to adjust some other variables like my ram timings or voltage. any suggestions are welcome. i'm really happy with 2.7 in any event🙂
 
Originally posted by: theman
try running a divider, set it to 166 ddr333. then see if you can get to 2.8. it would be insane if you could get that ram to do 280 at default timings. what are the entire specs on the ram? also, make sure your ldt is at 3x.
Click to expand...

i'll go ahead and try those recommended settings. here are the specs for the memory:

OCZ
 
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