DDR3 1066 running at 800mhz?

Just got my 1647 set up (replacement for my 1640) and got sent an additional 4gb dimm and popped it in for a total of 8 gigs.

CPU-Z shows 8 gigs, everything works fine..The Memory tab is blank so it doesn't show what its actually running at or its timings or dual channel mode or not...Which caused me to think it wasn't running in dual channel mode..So I got everest ultimate edition and it indeed showed it was working in dual channel so I was happy..But then I noticed it reported the memory was running at 100mhz and in ddr3 terms that effectively is 800mhz...The ram should be running at a base clock of 133mhz or 1066mhz effectively. All the tabs report it as being rated at 1066 and all that registers fine..Its just the "actual clock" reports it at 100mhz instead of 133..

I thought back to the 4gb dimm I recieved..It was refurbished which made me think it was the culprit..So I did some tests. I tested each dimm individually and each time (alone and together) everest reported 100mhz (800mhz)..

So is everest to be trusted? Are both my dimms bad? Whats causing my dimms to run at 800mhz instead of 1066? There is nothing in bios to tweak so how can I change this? And let me repeat, both dimms, when installed BY THEMSELVES (so 4gb total) still report 100mhz...so it cant be the refurb dimm...


What gives??

My window index score on memory is 6.8..which is about what it was on my last machine which used the same speed ram..

Could everest be wrong?

 

If the new one which you installed won't operate at 1066 then it will force all RAM to operate at the lower speed. What speed is the new RAM rated at?

 

Both are rated at 1066..Yea I know how it works..I tested them both individually. Bios recognize them at 1066 but everest shows actual clocks at 800...Dunno if its accurate..

 

Sometimes programs get things wrong, for example there can be about 5* difference in the temperatures different programs report.

I guess you could benchmark the speeds and latencies to see what you're getting. If the latency you get is significantly lower than what the specified latency is for when it runs at 1066 then you're probably running at a slower speed.

 

Have you tried HWINFO32

http://fileforum.betanews.com/detail/HWiNFO32/950009060/1

 

ok I just tried this HWINFO32 and I was surprised by my results. I its showing my memory clocks 666.7 MHZ or am I reading it wrong?????

EDIT heres my CPUZ results also.

Shall I call tech support and replace the ram?? or can it be the motherboard too?

Can other 1645/47 post their results too?

 

It looks like hwinfo32 think you have pc3-10600 which is 1333MHz 666MHz x2 , and CPU-Z says the same.

 

oh I didn't know that you have to multiply them... I just though it was 1333mhz per ramstick.

 

No you double it so you are fine you have DDR3 1333Mhz