gskill hz ddr500 is reading as ddr400

[MrX8503]

in memtest it says my ram is ddr400 at 200mhz with timings of 3-4-4-8 which are the correct timings for ddr500 not ddr400.

under cpuz under the spd tab it reads it as 250hmz but the timings are 3-5-5-10. SO what is going on here?

I heard that the new HZ's are reading as 3-5-5-10, if so, is my ram running ddr400 or ddr500?

 

[JBT]

in the BIOS did you manually set it to 250??? its not going to do it on its own as it defaults to whatever the CPU uses.

 

[MrX8503]

IN the bios i dont see where you set the ram speed. I went into dram configuration and i only saw ram timings and dividers. I set divider to 1:1 at 1t commandrate and the timings are on auto.

 

[xuemike]

hi i'm new to the forum but so don't flame me if i'm wrong.

out of curiousity just wondering what the specs of your system are.

and if it's overclocked

but i'm just speculating here but i think your ram is only *rated to go at 250 mhz which is 500ddr if you will. but most amd cpu these days will have a bus speed of 200 mhz unless you force your bus to higher frequencies(hence overclocked)

I believe most ppl buy ddr500 is because when you do overclock the motherboard bus the ram bus speed will also increase but if the ram is only rated to go at 200 the system might crash or very unstable unless they use a ram divider,

however the ram divider will limit the timing access from cpu to ram so alot of ppl want the 1:1 ratio. so ddr500 can let the bus run at 250 without problems or even more. but definatly stable at 250.

so i think 2 ways to solve your problem if you want your ram to go at 500.

1. set the ram divider to 4:5 so your bus runs 200 and your ram will run 250mhz so you can get a reading of ddr500 in memtest.

2. overclock your system to 250mhz bus. -- do more research before attempting this.

but it's just pure speculation at this point.

 

[MrX8503]

xue you are right, i just bumped my opteron to 2.0ghz by upping the fsb to 250 and left my ram on 1:1 which made it 250mhz or ddr500. I dont know how this slipped my mind.

 

[JBT]

you can't set the RAM speed. You need to set the CPU to run at a given speed IE default is 200 you need bump that up and then your memory will also run at that speed.
Say you have a 2GHz CPU its 200x10. You need to set tit to say 225x10 then your ram will run at 225 you just need to keep increasing your CPU speed until it reaches 250 which obviously with a 10x multiplier would give you 2.5 GHz

Most people would actually continue to raise the system speed and drop the mulitplier down say to 270x9 or something like that. This is where you start using the dividers in the memory settings. Who knows maybe you won't and your ram can clock that high and won't need a divider.

Also once you do start pushing your system speed that highier than 200 drop your LDT from 5 to 4 then if once you do start getting close to 250 to 3 so that you system is not unstable.

EDIT wups didn't know you posted again. Sounds like you got it.