Set memory to 800 or 1066 in bios?

Bigmonty

Bigmonty

Bigmonty

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6 Mar 2007
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Hi

I have just bought 4gb of kingston hyperx ddr2 8500 (2x 2gb). I have a Q6600 processor overclocked to 3ghz at the moment (FSB 333). I have the memory set to 5-5-5-12 800MHZ at the moment as it seems to work fine.

However people in guide for overclocking and Kingsons webpage tells me that I shoudl be putting it to 1066MHZ. Is there any advantage to doing this? I tired it and my PC bootup appeared a bit unstable.

Cheers.
 
same here , if you upped the voltage to the value it recommends and it still seems problematic drop it to 800mhz and have peace of mind it won't crash
 
I would say that the RAM should work at it's rated speed, make sure you have the correct voltage going through it would be all I can suggest.
 
I upped my voltage to 2.2v which I believe is it's correct voltage. I have 800MHZ running at that voltage at the moment.

Is there any benefit to upping ti to 1066 though at my current overclock and bearing in mind I will never reach 500+ FSB.

Cheers
 
A cut and paste as i was also wondering the same.

In full tweaker's fashion, it is possible to eke a little more performance out of DDR2-1066 vs DDR2-800. Since DDR2 suffers from high latencies, it all comes down to the timings! And in general it is preferable to stick to one of Intel's high-end chipsets for max memory controller speed and efficiency, or to stick to one of AMD's faster CPU's for a faster clock speed for the on-die memory controller. You may also have to jack the RAM voltage way up for low-latency stability, or increase the RAM's speed to compensate for relatively high latencies (which is what DDR2 was meant for!).

However, when OC'ing or tweaking, consider the balancing act required for max performance for your usage model. Gaming benefits more from lower latencies than extra speed on a ratio basis. Thus 4-4-4-12-1T @ 1066 MHz is far better than 4-5-5-14-2T @ 1200 MHz. Also keep in mind that the performance hit associated with higher latencies and RAM speed is more noticeable on a mid-range AMD CPU vs a high-end Intel chipset w/Intel CPU. So simply increasing the RAM speed with the same timings is beneficial to Intel-based systems more than AMD-based systems. This is why Intel is pushing these insanely fast 1333 MHz DDR3 modules for their systems - it really will help them more than AMD, which is holding off on DDR3 until 2009.
 
I have ordered the Kingston HyperX 4GB (2 X 2GB) DDR2 8500C5 1066MHz Dual Channel Kit (KHX8500D2K24G) as people recommended it. I currently have an 1066FSB processor, the one in my sig, and was wondering on my Asus P5Q Deluxe board, will i be able to set the Kingston 1066MHz DDR2 Ram to run at 1.1 1066MHz mode or 800MHz 1.1 with my cpu overclocked to 3.8GHz - Bus speed 346.0 MHz, Rated FSB 1383.8 MHz???

Thanks for responding.
 
I run my 8GB of Kingston HyperX memory at 1066MHz mode which means my memory is running at 1080MHz at 2.2v 5,5,5,15 which is gives a 5:6(FSB/Dram). with my CPU overclocked to 4.05GHz - Bus speed 450 MHz, Rated FSB 1800 MHz

For 1:1 (FSB/Dram) will will need to run memory at 800MHz
 
Last edited:
Simon D said:
I run my 8GB of Kingston HyperX memory at 1066MHz mode which is 5:6(FSB/Dram).

For 1:1 will will need to run memory at 800MHz
Click to expand...

so what`s gonna give better performance, the memory running 1:1 mode at 800MHz or it running at 1066 MHz on higher FSB/DRAM ratio???
 
Had a nightmare trying to get 4 sticks of kingston running at the stated speeds so have never bought them again. Nothing "wrong" with the memory but it needs a lot of volts and doesnt do what it says on the can in my expereince.
 
littlepuppy said:
Had a nightmare trying to get 4 sticks of kingston running at the stated speeds so have never bought them again. Nothing "wrong" with the memory but it needs a lot of volts and doesnt do what it says on the can in my expereince.
Click to expand...

You are correct it can be a nightmare to run 4 sticks at 1066Mhz does need 2.2v on memory with cooling as well and extra volts of the NB to give a stable system, but it is possible.
 
Simon D said:
You are correct it can be a nightmare to run 4 sticks at 1066Mhz does need 2.2v on memory with cooling as well and extra volts of the NB to give a stable system, but it is possible.
Click to expand...

So you need extra cooling on the RAM aswell to get 8GB working and you need to spend hours mucking around with voltages not specified in the instructions to get it to work - hmmm.
 
You need extra cooling on the NB as you need to put extra volts thought it to get 4 sticks of ram stable at 1066mhz. 4 sticks put more strain on the NB than 2 sticks.
 
I have had no probs with OCZ or Corsair but lots with kingston when trying to hit the really high speeds.

My advice. If you want 1066mhz with 4 sticks in. Dont buy Kingston. Needs too many volts and is more trouble than its worth.

All IMHO though and there may well be some who have managed to get this going without a prob.
 
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