OC'ing advice :)

dhill

dhill

dhill

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Joined
1 Sep 2004
Posts
1,605
Location
Northants
Current system:

AMD Athlon 64 3500+ Winchester (socket 939)
Asus A8N-SLi Deluxe
2x Corsair 1GB DDR XMS3200XL Pro TwinX (2x512MB) - 2Gb Ram in total in dual channel mode
ATI Radeon X850 XT PE
Enermax Noisetaker 600W PSU
Thermalright XP-120 CPU Cooler with Arctic Silver 5
Audigy 2 ZS

Ok, so I have a few questions for you guys & gals now, after reading some of the various posts.

Current BIOS Version - Phoenix-Award BIOS v 1016

Current BIOS Setup:

CPU Configuration Section:
DRAM Config
Max Memclock - 400Mhz
1T/2T Memory Timing - Auto
CAS#Latency - 2.0
RAS# to CAS# delay - 2
Min RAS# active time - 5
Row Precharge Time - 2

Hyper Transport Frequency - Auto
AMD K8 Cool & Quiet Control - Disabled

Jumperfree Configuration Section:
Overclock Profile - Manual
Overclock Options - Disable
N.O.S. Option - Disable
CPU Frequency - 200Mhz
PCI Experss Clock - Auto
DDR Voltage - Auto
CPU Multiplier - 11
CPU Voltage - Auto

Having looked at the various options, my limiting factors to my OC'ing ability appear to be as follows:
DDR Voltage - Only goes up to 3.00v
CPU Voltage - Only goes up to 1.650v

My questions now are as follows:

1. What should I set the 'Max Memclock' to as it currently 400Mhz?
2. Should I stick the DDR Voltage up to 3.00v & the CPU Voltage up to 1.650v to help stablize the system during OC'ing?
3. What suggestions do you have for OC'ing this setup?
4. Theres an option in the BIOS, cant exactly remember what its called, but has the options Auto, Set to CPU or 33.3Mhz. What should I set this to?

I did play around last night and managed to get it running as a 3800+, but had to reduce the 'Max Memclock' down to 200Mhz.

What is classed as a 'Ok', 'Good' & 'Very Good' OC for a 3500+ air cooled?

Cheers in advance :)
 
air cooled you will be looking for around 2.6 - 2.7 ghz as your oc any higher is very good.
i would not set the cpu voltage above 1.55V on air as it will be pumping out the heat! and only get the ram to the 3V if it says it can i would say 2.8 or upto 2.9 is generally safe, but if it goes dont look at me ;). I dont know of this bios so dont know what that the max mem clock sounds like it adjusts the HTT so that the memory is at this speed, as you would get better results by setting it to maual and setting things yourself eg HTT manual and divider to whatever that works :P. You could also set the HTT to manual as this would give you a fixed vaule which is getting multiplied by so you can work out what the final mem clock is.
apart from that sounds like you should be doing well. have fun!
 
1, this is your memory divider, so 400 is 1;1 with the htt (fsb)
2, Only up the voltages when you need to
3, use a divider to keep your latencies low, keep an eye on temps, set memory to 1t, lock pci-e bus to 101mhz
4, im guessing thats the pci lock(?), set it to 33.3mhz

Those voltages are more than enough, you shouldnt really have over 1.6 on air.
 
Cheers for the advice guy

1. Ill set the 1T/2T Memory Timing to 1T, will this help stabilze the memory when OC'ing?
2. Ill set the PCI-E Bus to 101Mhz
3. Ill set the other setting to 33.3Mhz
4. Shall i leave the memory divider to 400Mhz? It seems i have to reduce this slightly when OC'ing though, does that sound right cause I know if I reduce it it reduces the memory performance. Will this effect overal performance?
 
the 1t will give you the biggest memory performance boost, but it will be harder to get stable.

As your fsb gets higher you will either have to raise your latencies or reduce memory freq, and id lower the freq as a64s dont need too much bandwidth, so use the divider to lower the freq and keep your latencies low.

Set your htt bus to 4 too
 
So far I think I know that I have to do the following:

1. Set the 1T/2T Memory Timing to 1T
2. Set the Hyper Transport Frequency to 4
3. Set the PCI Express Clock to 101Mhz
3. Set the PCI Lock to 33.3Mhz

Also I think i will need to then change the following:

1. Set the DDR Voltage to 2.9v
2. Set the CPU Voltage to 1.55v
3. Reduce the Max Memclock down to increase stability (will try 333 and 200).

I should then be able to increase the CPU Frequency gradually until I start getting problems, and then back it back down until it becomes stable again.
 
Pics of my OC'ing attempts last night :)

4.jpg

7.jpg



Dont know if these are any good OC'ing wise, but it seems stable and was running stress test without errors. Max temp under stress hit around 48.
 
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