Overclocking help

November 20, 2009 at 18:38:15
Specs: Windows 7, amd phenom x4 9650/ Kingston Hyper X PC2 8500
I have done some basic overclocking, but I need some help with this setup.

The memory is only running at 800 MHZ, s/b 1066 MHZ?? I tried to increase the voltage but no good .

Then I want to overclock the processor and I need some help as far as where to start. I still have the stock cooler, should I upgrade that first??

All advice will be appreciated!!

See More: Overclocking help

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November 20, 2009 at 18:42:49
What motherboard are you using?

Don't worry about the stock cooler.


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November 20, 2009 at 18:57:31

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November 20, 2009 at 19:22:35
The board gets pretty crappy reviews at newegg:


"Due to AMD CPU limitation, DDR2 1066 is supported by AM2+/AM3 CPU for one DIMM per channel only"

Do you have more than 2 sticks of RAM?

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November 20, 2009 at 19:27:43
2 2GB sticks, 1 per channel. Running Windows 7 32 bit OS, so only 3GB is recognized anyway. Tiger gave the board decent reviews. I bought this as a kit, had to swap some parts out due to stock problems. Windows 7 came for free with the kit so it was a no brainer.

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November 20, 2009 at 20:22:10
If it's such a decent board, why is it that it doesn't work as advertised? Try updating the BIOS.

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November 20, 2009 at 20:33:30
That's the first thing I did - usually solves most problems. I do not use the on board video, and I have had No problems with the ethernet connection.

Can you help me with the overclocking??

I have had ASUS boards before and have found them solid. I was going to try a BIOSTAR, but hard to find in a kit.

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November 20, 2009 at 21:49:03
Before you try overclocking, you gotta get the kinks worked out. Make sure your BIOS is setup correctly, especially the RAM settings. Do NOT use defaults or auto.

Make sure AI Overclocking is set to manual. Manually configure the RAM speed to 1066MHz, manually set the RAM voltage & timings...if you don't know what they're supposed to be, check the Kingston website. Set Cool 'n' Quiet & all Spread Spectrum settings to disabled. Lock the PCIe at 100MHz. Save your settings & reboot.

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November 21, 2009 at 18:59:12
I made all of the suggested changes and I get an overclocking error.

The BIOS has many more DRAM TIMING OPTIONS than the 4 I changed. Any more ideas?? I changed the speed to 1066 and the voltage to 2.2 as specified by Kingston with the 5-5-5-15 timing setup. Spread Spectuums and Cool'n'Quiet have been disabled.

This is far more involved than my old PC.

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November 21, 2009 at 20:19:41
"I made all of the suggested changes and I get an overclocking error"

The settings I gave are NOT overclock settings. Are you sure you didn't change something else?

"This is far more involved than my old PC"

You haven't even started overclocking yet. There are plenty of other settings that will need to be addressed to do that. Right now I'm just trying to help you to get the RAM to run at the right speed. What was your old PC?

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November 21, 2009 at 21:27:00
It's an old AMD Athlon xp 2000 on a PCCHIPS board PC3200 memory, running XP. Just had to change the frequency for overclocking.

I double checked all of the settings you suggested, and I had made all of them. PC wouldn't boot, F1 to load defaults and continue after verifying changes (F2).

I printed out the memory sheet on the Kingston site - there is one setting I haven't tried but do not see.

Command Rate =1,

The BIOS has a lot of settings and I am uncertain of. ASUS not much help so far.

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November 21, 2009 at 22:05:18
Don't mess with the command rate, it has nothing to do with your problem...leave it at 2T.

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November 22, 2009 at 06:18:10
Part Number Timings
KHX6400D2K2/4G 5-5-5-15-1

Timing Definition Abbreviations What it does
5 CAS Latency CL Delay between activation of
row and reading of row
5 RAS to CAS (or Row to Column Delay) tRCD
Activates row
5 Row Precharge Delay (or RAS Precharge Delay)
tRP/tRCP Deactivates row
15 Row Active Delay
(or RAS Active Delay, or time to ready) tRA/tRD/tRAS Number of clock cycles between activation and deactivation of row

1 Command Rate CMD Rate Delay between chip select and command

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November 22, 2009 at 07:52:56
I know what your RAM specs are, I already looked them up. It doesn't matter that it's spec'd out for 1T command rate...2T is more stable & is *probably* what it's defaulting to. Like I said in my last response, it has nothing to do with your problem. You're wasting your time if you think changing the command rate is the magic cure.

I still think you made a BIOS change, either acidentally or on purpose, that 's causing the overclocking error message. None of the settings I recommended are overclock settings so the only thing I can come up with is that you changed something else.

If you feel confident that you can update the BIOS & don't currently have the latest version, I suggest you do the update. Then use the Clear CMOS jumper to reset the BIOS settings to the defaults, then start all over again.

EDIT: just thought of something...are you sure you have the RAM in the correct two slots?

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November 22, 2009 at 08:09:46
Once you set the AI Overclocking to Manual the BIOS believes it is being overclocked.

The PCIe defaults to 100, and the FSB to 200 - left as is.

The memory is in A! and B!, 1st 2 yellow slots on the MB.

I didn't see the jumper, so I removed the CMOS battery for a few minutes to restore default settings lst night and tried again.

I went back to the Kingston site, and now I see that the 5-5-5-15 voltage says 2.2 - 2.3 V. Maybe I will try 2.3 and see what happens.

Not giving up, a bit frustrated - S/B easier.

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November 22, 2009 at 08:23:48
Like I said earlier in this thread, your board does NOT get good reviews. ASUS generally makes good boards but nvidia chipsets aren't the best choice for AMD systems anymore. Intel makes the best chipsets for Intel CPUs, AMD makes the best chipsets for AMD CPUs. You would have been better off with the ASUS M4A785-M.

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November 22, 2009 at 10:51:37
I actually do not like the BIOS - American Megatrends. I have had 3 other ASUS MB's, all had PHENOIX BIOS's.

I will live with the memory speed for now, I will call or email ASUS because the memory is supposed to support 1066 memory.

OK, next - OC this PC. Where do I start?? I am back to the default BIOS settings. Increase the Voltage or FSB??

I appreciate your patience and your reccomendations.


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November 22, 2009 at 13:24:30
"Increase the Voltage..."

Never increase the voltage unless it's absolutely necessary. Voltage does NOT increase speed.

"...or FSB??"

AMD hasn't used a FSB since the days of the socket A. As soon as the Athlon64 was released, the FSB was dropped in favor of the HyperTransport bus. The CPU speed is now the product of the CPU mulitplier & the CPU reference clock. The HT bus is the product of the CPU reference clock & the HT multiplier. Unfortunately, not all BIOS refer to them under these terms so you have to know what to look for. What this all means is there are now numerous settings that will have to be adjusted to overclock the CPU. It's a LOT more complex that it used to be.

Go back to response # 7 & do everything I listed except for changing the RAM settings...just leave the RAM settings on AUTO. All the rest of the settings I listed are "set & forget". You only have to do it once, then leave them that way. Then you can start playing with the CPU ratio, CPU frequency, CPU/NB frequency & HT link speed.

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November 30, 2009 at 15:18:00
I replaced the Kingston memory with OCZ Reaper PC2-8500, changed the settings 5-5-5-15, 1066 and 2.2v rebooted and it was running properly!!

I overclocked the Video Card already - now I am going to move onto the the CPU!!


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