GSkill HZ (PC4000) has arrived

geeza · 8 Mar 2006 at 20:28

It has arrived now and generates errors in memtest86 when its at 280x10 at 1:1 running 3-4-4-8 timings. I now have it on a 180 divider running 280x10. so the memory is at 254mhz.

should i try it at 270x10 and no divider (doing away with 100mhz) or try something else like adjusting the timings/voltage on the memory to get it to 280mhz at 1:1

Spec in sig

marc2003 · 8 Mar 2006 at 21:17

pc4000 ram is only rated for 250mhz.....

Jamie1984 · 8 Mar 2006 at 21:28

marc2003 said:
pc4000 ram is only rated for 250mhz.....

but its performance memory aint it? or does that count for nothin?

marc2003 · 8 Mar 2006 at 21:34

Jamie1984 said:
but its performance memory aint it? or does that count for nothin?

depends. i have no idea how this particular stuff clocks.

the ram in my sig for instance is pc3200 rated for 200 yet i'm running it at 245mhz. some people have got their's to 270 and above. mine simply won't do it but can i complain? nope. even if it wouldn't do 201 i can't complain so long as it runs flawlessly at 200....

Agent WD40 · 8 Mar 2006 at 21:38

Jamie1984 said:
but its performance memory aint it? or does that count for nothin?

And 250mhz isn't enough for you..? Mine topps out at about 270 mhz and seeing as this is a 2gig kit I am very pleased with it!

Agent. :cool:

geeza · 8 Mar 2006 at 21:49

marc2003 said:
pc4000 ram is only rated for 250mhz.....

we are on an overclockers forum here

should i leave on divider and be happy with just above 250mhz or take it off a divider and slacken timings/increase volts?

marc2003 · 8 Mar 2006 at 21:53

geeza said:
we are on an overclockers forum here

you missed my 2nd post then....

i take it you researched the ram before you bought it. everyone elses stuff doing 280+?

sorry i really have no idea about 2gb kits....

mp260767 · 8 Mar 2006 at 22:15

check this thread :

http://forums.overclockers.co.uk/showthread.php?t=17525559&highlight=gskill+4000

geeza · 8 Mar 2006 at 23:20

mp260767 said:
check this thread :

http://forums.overclockers.co.uk/showthread.php?t=17525559&highlight=gskill+4000

cheers, ill have a read

Jamie1984 · 9 Mar 2006 at 00:26

Agent WD40 said:
And 250mhz isn't enough for you..? Mine topps out at about 270 mhz and seeing as this is a 2gig kit I am very pleased with it!

Agent.

ill let you know when i get a new rig to overclock!..hey before i started reading these boards all i knew of was the FSB (LDT now?

) and a multiplier....now its all dividers, ram timings, volts!

Squidge · 9 Mar 2006 at 09:01

GSkill seems like it can be made to work in most situations

Mine was unstable at 260Mhz, but I finally managed to get it stable by dropping the voltage to 2.4V and messing around with the data drive strengths and various timings.

Just remember however that since it's labelled as PC4000, it's only guaranteed to 250Mhz.

geeza · 9 Mar 2006 at 10:09

Squidge said:
Mine was unstable at 260Mhz, but I finally managed to get it stable by dropping the voltage to 2.4V and messing around with the data drive strengths and various timings.

I dont understand why it prefers less volts (ie 2.6) but its default is 2.7 :confused:

Jamie1984 · 9 Mar 2006 at 12:14

so, say your g.skill maxes out at 260mhz, you could then get 260 x 10 (multi on opteron 170?) for 2.6ghz? or could you then add a divider to bump it up a little?

geeza · 9 Mar 2006 at 12:24

Jamie1984 said:
so, say your g.skill maxes out at 260mhz, you could then get 260 x 10 (multi on opteron 170?) for 2.6ghz? or could you then add a divider to bump it up a little?

the multi on an opteron 146 is X10, not sure about an opteron 170. you dont 'bump it up' with a divider.

you set the fsb higher, a la 280x10, then set the divider (of say 180) so it makes the memory stay at 250mhz. I dont know the maths behind how it works so just boot into memtest first and have a look, so it doesnt bugger up windows if its too high.

Im going to try for 1:1 with my Gskill tonight by changing from 3-4-4-8 trc 7 2.7volts to 3-4-3-8 trc 13 volts at 2.6. lets hope it works

Squidge · 9 Mar 2006 at 13:36

geeza said:
I dont know the maths behind how it works so just boot into memtest first and have a look, so it doesnt bugger up windows if its too high.

DRAM Clock = CPU Clock/(ceil(CPU Clock Multiplier/Memory Divider))

or just visit: http://xtremesystems.org/forums/showthread.php?t=44339 for a program that'll do it all for you

geeza · 9 Mar 2006 at 13:46

Squidge said:
DRAM Clock = CPU Clock/(ceil(CPU Clock Multiplier/Memory Divider))

or just visit: http://xtremesystems.org/forums/showthread.php?t=44339 for a program that'll do it all for you

thanks, good program, will be usefull to quite a few people i think.

thats why memory is at 254mhz because its actually 183 not 180!