Can't get 1066 speed from Kingston DDR2 1066 4GB memory sticks

[smev]

Specs:

Memory: Kingston (2GBx2) - PC2-8500 1066MHz CL5 (KHX8500D2K2/4G)
http://www.kingston.com/hyperx/products/khx_ddr2.asp

CPU: Core 2 Duo E6400 overclocked to 3.1GHz

CPU Cooler: Corsair A70

Motherboard: Asus P5W DH Deluxe

I'm a beginner at this but I am trying to overclock my system. I have got my Core 2 Duo E6400 so far to go from 2.13GHz to 3.1Ghz. E6400 is suppose to run at 1066MHz.

My Asus P5W DH Deluxe mother board is also suppose to be capable of running at 1066Mhz.

The memory is PC2-8500 and is suppose to run at 1066MHz but whenever I try to adjust it in the BIOS I haven't been able to get it to work at 1066Mhz. The furthest I've got was putting my CPU frequency to 355Mhz with the DRAM frequency at 1065Mhz. The memory voltage is at 2.3V. The computer starts up to about the Windows 7 logo animation and then freezes.

What do I have to do to get the memory to run at PC2-8500 1066Mhz?
And what else can I do get some more speed out of overclocking the CPU? The system is running betwen 30-40 degrees C.

 

[sportsfanboy]

You can try giving the north bridge and ram a +.5 or +1 to the voltage. Also skew to 150 can help with high frequency ram.

 

[4745454b]

Dude! Whats 483.5 times your 4:5 ratio?

Drop the ram voltage back down to whatever the specs call for. Change your ratio to 1:1. Up FSB as your able.

 

[smev]

You can try giving the north bridge and ram a +.5 or +1 to the voltage. Also skew to 150 can help with high frequency ram.

On the Kingston website for this memory the recommended settings it gives is 2.3V. Is it dangerous and does the warranty become void if I go above that and something bad happens?

KHX8500D2K2/4G 4GB DDR2 1066MHz Non-ECC CL5
(kit of 2 – 2GB) 5-5-5-15 2.2-2.3V

And how do I adjust the north bridge? Is that the vcore voltage? Because I haven't been able to access that vcore voltage setting in my bios. The only option it gives is auto.

 

[smev]

Dude! Whats 483.5 times your 4:5 ratio?

Drop the ram voltage back down to whatever the specs call for. Change your ratio to 1:1. Up FSB as your able.

What's wrong with the 4:5 ratio?

The memory voltage recommendation from Kingston website is 2.2-2.3V.

How do I get it 1:1 ratio and then eventually get the CPU overclock to 3GHz and the memory running at 1066Mhz (533Mhz)?

 

[4745454b]

No offense, but if you don't know the answers to these questions you shouldn't be OCing. I strongly suggest more reading about how to OC the C2D/C2Qs. The Vcore is NOT the NB voltage, and the 4:5 ratio is whats holding back your FSB overclock. You're already over 1066MHz with that ratio, putting it higher isnt' going to help. Drop down to 1:1 and you'll only be at 700 something.

 

[smev]

Ok,

Put aside the CPU overclocking part. How do I get my memory to start as PC-2 8500? All I am doing is going into the bios and adjusting the dram to 1065Mhz. I am leaving the FSB Cpu frequency to it's original 266MHz. When I change just the dram to 1065Mhz and the computer restarts it shows it as PC 8500 but it always stops loading at the windows 7 logo animation and the computer restarts. When I set the dram to 800Mhz the computer boots up fine as PC-6400. I just can't get pc 8500.

 

[4745454b]

The fact that you need 2.3V with a CL timing of 5 just to get to 1066 says to me you have some low end ram. (no offense.) Assuming you put everything the way it should be, I can only guess its some sort of compatibility issue.

I would set the ratio to 1:1, run the sticks at DDR2-800, and try to get the timings down to CL4. 800 or 1066, won't make much difference.

 

[smev]

Okay I put the timings at 4-4-4-12. The memory is at 2.2V i think.

Got 1:1 ratio. I can only get the cpu frequency stable at 380Mhz. So memory is also at 380MHz (760Mhz) not PC2-6400 800MHz.

Is the above on the right track?

How can I get the FSB upto 400Mhz and the memory upto 800Mhz for Pc2-6400 and still keep the 4-4-4-12 timings?

 

[4745454b]

You might not be able to if your already at 2.2v. Bump the timings down to 5-5-5-15 and see if you can hit 400MHz.

 

[smev]

Okay, thanks for your help 474545b.

I took out the cmos battery and set the jumpers to reset my bios. After doing that I was able to get over400Mhz. However, I can't get the 4-4-4-12 timings or the 5-5-5-15 timings. I just let the SPD thing decide the timings.

I think I'm just going to leave it at these settings.

 

[4745454b]

5-6-6-18 isn't bad. I still think with some better sticks you'll have better luck. I'm running Gskill DDR2-800 ram, but it runs at that speed with only 1.8v. (CL timing of 5) I haven't OC'd them at all, but I'm pretty sure I can hit CL4 with a voltage of 2, or keep the CL5 setting and hit 1066.

If you feel like playing around with it some more, try doing some real world benchies with the different settings. How much faster do things unzip if you have DDR2-800 or 1066? How many more FPS can you get between 5-5-5-15 and 5-6-6-18? Then again, considering how much work this took you might want to pass.

410MHz, not bad. I'd settle for 400MHz/3.2GHz. More so if you can drop the voltages down any.