HELP : New (faster) Ram, Now Won't Cpu Won't Reach Same Overclock?

harris1986

harris1986

harris1986

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4 Aug 2005
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ok guys i recently had some 2x512mb pc5300 geil value running 800mhz up from the stock 667mhz giving my cpu a clock speed of 3.2ghz this was nice and stable and had no problems!

i received my new ram this morning - Geil Pc6400 2x1gb Ultra Low Stuff, popped them in and thought well 800mhz is stock for these sticks so i tried booting to no avail :S, i dropped my cpu fsb back to 375mhz again i just get a blue screen!

so my question why the hell won't these sticks run at the stock speeds with the cpu overclocked when my others will run overclocked? but they will run 800mhz with the cpu at stock speed? :confused:
 
ok a little update for you, i manually set my cpu to stock speeds and ram to standard 4-4-4-12 timings all on stock volts and ran orthos and failed and rebooted within 5 seconds! stuck everything to it's Auto defaults and cpu-z is running my ram at 5-5-5-18 timings? what the hell is that about?
 
hmm i thought this but i only received it yesterday, i'l have to give it a good memtest and see what it comes up with! will be mightely annoyed if the ram is borked on arrival!
 
harris1986 said:
ok a little update for you, i manually set my cpu to stock speeds and ram to standard 4-4-4-12 timings all on stock volts and ran orthos and failed and rebooted within 5 seconds! stuck everything to it's Auto defaults and cpu-z is running my ram at 5-5-5-18 timings? what the hell is that about?
Click to expand...
the on chip spd timings of the geil ram is pretty poor. So 5-5-5-18 is to be expected.

I would try it with each stick individually, and maybe the other slots for dual channel.
 
urm the thing is if everything is at auto then it sets spd timings to 5-5-5-18 but these are the clocks for this ram! it's not the value stuff it's the ultra low latency that's got timings of 4-4-4-12 so why is it defaulting to slower timings? it even says it's cas4 on the modules!
 
yea ive got the same ram, it does default to really slack timings for maximum compatibility. They all do that, its not the problem. Have you run memtest?
 
they seem pretty good, i run my 6300 @ 3.2ghz (458x7=06mhz) so the ram is running at 916mhz @ 5-5-5-15. I expected more when i initially bought them going by gibbos thread on them but still pretty pleased with them. I got them about a week after ocuk got them in.

They do default to crappy timings if you run them on auto but even though they are rated for 800mhz at 4-4-4-12 the spd timings they default to are much slacker. If you go into cpuz and look at the memory tab it shows what timings/speed is written onto the chip memory.

Im running the DS4 so cant set a memory divider less than 1:1 so cant really go any further than 3.2ghz.

Im running them at 2.1v btw, didnt get any better with 2.2v, havent tried 2.3v. :)
 
hmm okies, i'm doing a reformatt with my new raptor tonight anyways and all afternoon my comp has been sat with no power and clearing cmos so should well an truly have cleared it :p, will do a install then try clocking up again setting timings to 4-4-4-12 innitially and see how high it will go, i'l be disapointed if they won't do 3ghz! as my pc5300 overclocks like a beast :p
 
hi i got the same ram as you today Geil Pc6400 2x1gb Ultra and im having the same problems as you on my set up i can only get my machine to boot up @ 350fsb with 4-4-4-12 timeings 2.1 volt. if i turn on auto spd in bios they will run @400 fsb , in fact they wont even boot my pc up with anything more than 350 even with 6-6-6-18 @2.3.

e6600 9x400 3600mhz
asus pw5 dh
Geil Pc6400 2x1gb Ultra
 
romper76 said:
hi i got the same ram as you today Geil Pc6400 2x1gb Ultra and im having the same problems as you on my set up i can only get my machine to boot up @ 350fsb with 4-4-4-12 timeings 2.1 volt. if i turn on auto spd in bios they will run @400 fsb , in fact they wont even boot my pc up with anything more than 350 even with 6-6-6-18 @2.3.

e6600 9x400 3600mhz
asus pw5 dh
Geil Pc6400 2x1gb Ultra
Click to expand...

just out of interest did you clear cmos? or run memtest?
 
Got my Geil 6400C4 ULL about a week ago now and its working like a charm, does stock 800Mhz 4-4-4-12 @ 2.1V no problems, and its now running @ 952Mhz 5-5-5-15 @ 2.1V in the rig in my sig.

I noticed you both have the ASUS mobo, maybe incompatability? any newer bios's out for that board? as like I say this stuff works flawlessly in my DS3... :confused:
 
i think it's to do with the spd timings that once it hits a certain fsb the board tries to default the ram to something like 5-5-5-18 for some bizzare reason!
 
i haven't but i will thanyou for the link :), as the post is 84 pages long are there any specific parts i need to pay attention to? or that relate to my problems?
 
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