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Kingston HyperX ram only running 400mhz?

Last response: in Memory
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March 12, 2008 9:55:09 PM

I received today my order of Kingston HyperX memory: PC2-6400 CL4 1gb sticks x 2 - part No: KHX6400D2LLK2/2G

I have installed both memory sticks and ran CPUZ and confused at its listing, it states the ram is running at 400mhz, yet this should be 800mhz ram? Also the timings should be 4-4-4-12 and again it lists 400mhz at 5-5-5-18.
Any ideas why this is?

I tried to upload a piccie of CPUZ report but guessing this cant display on here.
My mobo is M2N32-SLI Deluxe with latest bios / CPU AMD64 x2 5000+ black edition / Kingston DDR2 recognised as PC2-6400 (400MHZ)

I have tried looking around but people seem to have different problems dependant on their own set up or motherboard.

March 12, 2008 10:06:44 PM

400mhz is right, since it's DDR2 ram it's effective speed is 800mhz dual channel, but each individual stick is 400mhz

As far as the timings go, try to set them manually in the BIOS
March 12, 2008 10:21:33 PM

Thanks! So the fact it states 400mhz is right as its doubled up to make the 800mhz.

Timings against 400mhz show the 5-5-518 BUT on the 266mhz they show as 4-4-4-12 which is what they should be but against the 400mhz column not 266mhz.

I checked the bios out and its set to auto configure although 800mhz does appear in the display as an option. I dont like to play around in the bios as im not experienced in these kind of settings, I worry about frying the ram or worse off the board itself.

On another similar note: I quickly tried adding another 1gb stick of HyperX ram to dimm slot 3 on the mobo. Ran CPUZ and it noted all slots as single as apposed to dual, but the weird part was that slot 3 stated it was Kingston PC-5300? Yet this is the same ram as what I just bought? (the reason I bought new ones was the first set had a dodgy stick in the pack, ive been running on 1gb until todays new arrival)

AND finally, if this all sounds normal, would I be better running 3gb of single channel ram or 2gb dual channel?

Thanks again!
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March 12, 2008 11:05:55 PM

Not sure about the mis-reported PC-5300 but as far as I know you can't have single and dual channel memory running at the same time, it's either one or the other.

2gb dual channel will probably serve you better than 3gb single, as dual channel has double the bandwidth of single, meaning it literally runs twice as fast.

In terms of messing around in your BIOS, you're probably best not doing it unless you're confident or have some good guides to help you along. You're not losing THAT much in 5-5-5-18 over 4-4-4-12, maybe 2-3% performance loss
a b } Memory
March 12, 2008 11:35:17 PM

^It is possible to run Dual Channel and Single channel if you have 3 RAM sticks.
March 12, 2008 11:46:05 PM

You learn something new every day ^^
March 13, 2008 1:08:23 AM

OOT>

To shadow: is it 100% guaranteed that we can run 3 stick on a dual channel board? In theory it is, but I read on some threads reporting problem on 3 stick.

And also I bet that there a slight decrease in performance.

And btw: it's got effective speed of 800MHz (double of it's actual 400MHz) is due to DDR (double data rate), not dual channel. Indeed dual channel increasing performance :) 
March 13, 2008 1:31:52 AM

Eh close enough... I know what i meant anyway :p 
I'll just blame that lapse of intelligence on way too little sleep... *shakes fist at Lost Odyssey for stealing sleeping hours*
!