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need help over clocking with Amd overdrive ht reference clock

post #1 of 7
Thread Starter 
im using amd overdrive with my 4170
i can move the multiplier but what i really want to move is the Ht reference clock right now its stock at 200 and i cant move it. is there something i can do in bios to make it work? i have a asus m5A99X
post #2 of 7
Quote:
Originally Posted by pr0k1llz View Post

im using amd overdrive with my 4170
i can move the multiplier but what i really want to move is the Ht reference clock right now its stock at 200 and i cant move it. is there something i can do in bios to make it work? i have a asus m5A99X

First of all you shouldn't use third party(in OS) CPU overclocking software.

I haven't any experience with your motherboard, but I have experience with the American Megatrends Inc. BIOS which is used by all ASUS products.

If it is at 200 I suppose you are talking about the FSB as the standard FSB is 200 and the standard HTT is 2600(both in MHz)
You can access the BIOS and change the HTT clock in straps or by bumping up the FSB. The voltages you will need to play with are the CPU/NB and the Vcore if you intend to overclock through the FSB. Also at higher FSB clocks(260 and up) increasing the CPU VDDA will help achieve a higher overclock. And at higher CPU/NB(IMC)(2600+) clocks(HTT is directly effected by the CPU/NB) an increase to 1.175v-1.2v of the NB can help with achieving a higher overclock as well.

This may not be your board but due to the BIOS/CPU/Chipset being made by the same company the voltages and values will be the same.

http://rog.asus.com/forum/showthread.php?2585-ASUS-Crosshair-V-Formula-BIOS-Guide-Overclocking

Here is also a guide I have created(based off others information and my experience) that will benefit your overclocking experience;

I would set the multi to 20(4Ghz) and OC from the FSB from there, that way you can get a Overclock of all your components, rather than just an overclock of your CPU.

First you will need to input a few things into the BIOS.
1. Disable all power saving settings
2. Set LLC(VRM) to CPU Ultra high(75%) and CPU/NB to High(%50)(change Over-Volt percentage to %120-%130)
3. Set CPU/NB to 2200Mhz
4. Set HTT to 2600Mhz
5. Set CPU/NB voltage to 1.3(will help with CPU/NB and FSB frequency stabilization)
6. Set RAM voltage 2 bumps more than stock(will help with RAM stabilization when overclocking FSB)
7. Increase FSB after setting multi to 20x by 5 each run(increase Vcore as you would with multi Overclocking
8. Test stability using Blend test P95 for 15-20 minutes(this will be sufficient if you will be overclocking further anyway.)
9. Keep HTT and CPU/NB as relatively close to their default values(listed above) when trying to achieve target overclock.
10. Upon achieving target overclock run P95 for 2-4 hours to make sure CPU OC is stable.
11. Try increasing CPU/NB frequency first after achieving target CPU overclock.(should be able to reach 2400mhz without bumping from 1.3v CPU/NB)
12. When Increasing CPU/NB freq. past 2600 give NB voltage 1 or 2 bumps.
13. Try increasing RAM Frequency(if changing frequency OC fails, then try playing with timings before touching drive trains or voltage.)

Alternatively you can just stick with Multi clocking. Generally speaking you COULD not WILL, miss out on %5-%10 of what your Computer is able to put out IMO;
1. Complete 1-4 on last set of instructions
2. Set Voltage to 1.5 or 1.45/1.475(AMD considers 1.5v to be the most voltage without causing degradation of the CPU, but what ever you feel comfortable with and your cooling is adequate for)
3. Bump up multi use P95 Small FFT's(the first option) 15-20 minutes in between
4. Upon reaching target Overclock run P95 for 2-4 hours
5. (optional) Complete overclock CPU/NB and RAM as described in last set of instructions

NOTE;
1. CPU/NB is the second most important frequency to overclock, after CPU freq. try to aim for 2600-2800 for best results(I hit 2700@1.4v)
as it is in direct correlation to the L3 cache which is how your CPU interacts with DIMM's and PCI-E lanes.
2. Going beyond 1866mhz RAM speed is useless as AMD processors will only function @ 1866 DDR3, going over 2133mhz will also
most likely cause instability in system(1866CL7 1T is theoretically faster than 2400CL10 2T)
3. Keep HTT @2600 unless CPU/NB freq. exceeds 2600, else match HTT freq. with CPU/NB.
4. Good RAM test is Memtest86 is considered the best RAM and tester.
5.P95 Custom Test, Settings;
I) Set RAM used to 2047
II) Set FFT test times to 10 minutes each
III) Run for 2-4hours

Glad to see you on OCN! And happy Overclocking!
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FX-8350 FX-4170 FX-6300 ASUS Crosshair V Formula  
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Optical DriveCoolingOSMonitor
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post #3 of 7
Thread Starter 
wow thanks lol i tried bios before and i got a 4.8Ghz stable but that was just me messing with it for 40 minutes biggrin.gif and p95 didnt make me crash. Now i think ill try 4.9 in bios with this method Thanks for the help
post #4 of 7
What prime wont show is NB issues. it can cause graphics issues even though prime95 works fine. It does nothing on the Vishera chips but generate lots of heat. Mine is fine at 2200, anything higher even with cpuNB at 1.3V causes graphics issues like flashplayer stuttering, some panels becoming transparent etc Yet to see it improve anything
post #5 of 7
Quote:
Originally Posted by mjrhealth View Post

What prime wont show is NB issues. it can cause graphics issues even though prime95 works fine. It does nothing on the Vishera chips but generate lots of heat. Mine is fine at 2200, anything higher even with cpuNB at 1.3V causes graphics issues like flashplayer stuttering, some panels becoming transparent etc Yet to see it improve anything

While, yes it CAN not WILL, cause graphical anomalies, I was able to get about an extra 5fps in all games taking the NB from 2200 to 2600. I also found it helped to increase it 200mhz over the RAM frequency, as it does directly function with the RAM and PCI-E slots. But it is very good you mentioned that. That way it can give the OP a better Idea as to what may be the cause of such a thing. To achieve that clock (2600) I needed to have it at 1.425v and NB set to 1.2v. Heat jumped a little with the Bulldozer chip. but it didn't seem to add much heat with Vishera.
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post #6 of 7
Hi thanks for reply, what was at 1.425 and was that NB or CPU NB Voltage. I took CPU Nb to 1.3 V Didnt change anything.
post #7 of 7
Quote:
Originally Posted by mjrhealth View Post

Hi thanks for reply, what was at 1.425 and was that NB or CPU NB Voltage. I took CPU Nb to 1.3 V Didnt change anything.

I took the CPU/NB voltage to 1.425v. I brought the NB to 1.175v. Also, not my self, but others had luck with bumping up the RAM VDD from 1.2 to 1.25 to help get rid of those anomalies you were talking about.
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RAMHard DriveHard DriveHard Drive
Trident X Seagate 1.5TB OCZ Vertex 4 Western Digital Green 
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ASUS 24x DVD writer/reader Hydro H70 CORE Windows Ultimate BenQ GL2450 
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