• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

3500+ OC'ing help

Associate
Joined
3 Jul 2005
Posts
84
K, i want to clock my AMD 64 3500+, with luck upto about 2.4 or higher if poss.

I am using the Arctic Freezer 64 Pro.
Below is a link to my bios settings, if some of you could take a look & guide me in the exact direction/ along the way to oc'ing it.

My mobo is GigaByte K8N Ultra-9, Socket 939, SATA, Snd, Lan Motherboard
using latest bios v8.

Here is pic of my bios settings as default, so what do i do ?
http://www.xbox-emulation.co.uk/pic1.jpg
 
Need a bit more info pls - what RAM are you using?

Also, have you read the overclocking sticky in the Overclocking & cooling forum?

Hmm, come to think of it, that forum would be a better place for your question!

Hav :)
 
From what I can recall from reading that thread it's pretty much a step by step guide, but I'll give you the basics anyway.

HTT speed is the base from which all clock frequencies are derived. CPU frequency is calculated from the HTT frequency using a multiplier. All AMD 64 CPUs (except for the FX series) have upwards locked multipliers, meaning the maximum multiplier you can use is defined by your CPU - in your case I think this is x11, which equals 2200MHz, or 2.2GHz.

To overclock your CPU you need to increase the HTT frequency. Default HTT on ALL CPUs is 200MHz. To achieve a 2.4GHz clock speed you could either increase HTT to 240MHz and decrease the multi to x10, or keep the x11 multi and increase the HTT to 218MHz.

You need to keep the HT (HyperTransport) speed at or below 1000MHz. This is acheived by the use of the HT multiplier (sometimes referred to as the LDT multiplier). Choices are normally: auto, 1x, 2x, 3x, 4x, 5x

Auto = 5x normally.

The HT frequency is derived using a multiplier of the HTT frequency, and the default of 1000MHz is derived from 5 x 200MHz.

DDR speed is derived from the HTT speed and by default runs 1:1, i.e. 200MHz. To keep your RAM stable and achieve the best timings you'll want to keep it close to it's rated speeds, in your case 200MHz and 2-3-2-5.

Actual DDR speed can be adjusted by using a divider, which will cause the memory to run slower than the HTT. Normally, the available dividers are 200MHz, 166MHz, & 133MHz. Some boards have a 150MHz divider also.

If you have increased your CPU clock speed to 2.4GHz by using 240MHz HTT x 10, to keep your RAM close to default speed you would use the 166MHz divider.

To achieve stability may need more volts, but be warned, increased volts and speed equals more heat, so be sure you have adequate cooling before you start o/c'ing.

You may need to give the CPU more volts, or the RAM, and sometimes even the chipset.


That's the basics of overclocking. Here's a 2.4GHz scenario for you.

CPU speed = 2.4GHz (240MHz HTT x 10)
HT speed = 960MHz (240MHz HTT x 4)
DDR speed = 200MHz (240MHz HTT using 166MHz divider)

Hopefully this helps.

Hav
 
Thx Hav,

I got 2.4ghz but just wondered how i can get 2.4ghz without haveing to decrease the speed of my ram. As it dropped to 240mhz & i would like to keep my my nice 400mhz.

This is what i did based on my pic:

HT Frequency ratio [4x]
CPU Frequency [240]
K8 CPU Clock Ratio [10]
DDR Clock / Timing Mode [Manual]
CPU / DDR clock Ratio 2 / 1
DDR speed at this point was 240
 
Sin-Tex said:
Thx Hav,

I got 2.4ghz but just wondered how i can get 2.4ghz without haveing to decrease the speed of my ram. As it dropped to 240mhz & i would like to keep my my nice 400mhz.

This is what i did based on my pic:

HT Frequency ratio [4x]
CPU Frequency [240]
K8 CPU Clock Ratio [10]
DDR Clock / Timing Mode [Manual]
CPU / DDR clock Ratio 2 / 1
DDR speed at this point was 240

Your RAM speed is double the HTT speed, so 240MHz x 2 = 480MHz

Hav
 
Havana_UK said:
Your RAM speed is double the HTT speed, so 240MHz x 2 = 480MHz

Hav

urm no, with everything at stock/ auto my DDR Speed in the bios is 400 & if doing a system info with 3D Mark i can see it says Memory Frequency 200.0MHz (obviously x2) = 400

But when doing the OC, DDR Speed in the bios shows as 240 & the system info in 3D Mark shows Memory Frequency 120.0MHz again x2 would be 240.
 
Seems i was only using a 100mhz divider, ( default is 2 / 2 & i originally tried 2 / 1 ) when is meant to be 2 / 1.66 for oc'ing how you said.
This is what i have done now:

HT Frequency ratio [4x]
CPU Frequency [242] ( using 242 since 240 only gives me 398mhz DDR Speed
K8 CPU Clock Ratio [10]
DDR Clock / Timing Mode [Manual]
CPU / DDR clock Ratio 2 / 1.66
DDR speed at this point was 400 :D


CPU-Z pic as requested, using 1.66 divider.
http://www.xbox-emulation.co.uk/pic2.jpg

Thanks ;)
 
Last edited:
From what i can see i have only got a 3-4c increase in temp.
Now getting 41-42c but it's also a hotter day anyway.

Reccon i might go higher.
 
hi guys, novice overclocker here, i've got my 3500 @ 2.5GHz, so i reckon you can probably push the envelope a bit more on yours- i'm not sure whether i've got all of the settings quite right though, especially with my RAM...
 
Do what i did if you can, take a pic & post them.

I am currently @ 2.48ghz with ram at 410mhz still using the same latency timeings of 2.3.2.5

Not tried to alter the voltage yet, not sure if i want to.
Unless anyone things it is really worth it & got some nice high oc'ing.
 
i'm not going to be able to pilot the rig until the weekend- busy at work and play! i'll get the numbers posted when i can. hopefully i'll be able to find out if i've got anything hideously wrong!
 
Back
Top Bottom