GeIL 2GB (2x1GB) PC2-6400C4 800MHz ULL

overclock.jpg


Running 5/5/5/18 at the mo just slacked of for my first overclock

Bus Speed = 300
Rated FSB = 1200

now im running my CPU @ 3.2

overclock_3200.jpg


Bus Speed = 320
Rated FSB = 1280

Can it go higher?
 
Last edited:
Cream Cheese said:
They're all set to stock settings and i've run memtest on each of them seperatly and no errors are shown. It's just when I put them all in together.

I've even tried upping the voltage to 2.3v which is the max for my RAM and I still get blue screens when I get into windows!
Click to expand...


What operating system do you have , 4 gig won`t run with XP , I read this somewhere ,can someone please confirm this ?

tommysdad
 
Ok I am having a strange issue with this ram or my mobo/ram combination. I specifically bought these sticks because people said they suited my board the best and had minimal issues. The board is the Gigabyte P35-DS3R. I have 2x1gb sticks in dual channel obviously. I have an e2140 here with a good stepping and seems a good clocker. I can hit 3ghz with relative ease almost on stock volts (this board suffers from vdrop and vdroop). I have got it up to 3.2ghz with only 1.35 volts (BIOS reading, actual is around 1.3V) but I jumped the voltage up and I'm sure I can get that right down if need be. Temps at the mo are good and idle around 22 and load around 51 max.

Now, I can run this mem @ the rated 400mhz at either 5 5 5 15, 5 5 5 18, 4 4 4 12 and it will pass mem test fine. I can get into windows and bench Orthos for hours stable with the 3.2ghz clock and ram running 400mhz 1:1, BUT.... I absolutely cannot seem to even start overclocking this ram at all. The second I set the mhz to anything over 400 FSB (so ramis running over 800mhz) it just will not boot up.

I have tried adding ram voltage, slackening timings more, lowering the cpu multi from 8 to 6 so I am confident it is not the cpu, upped vcore, upped northbridge voltage, upped pci-e voltage and another one, locked pci-e @ 100 and 101, tried a different dram setting. I cannot get them to boot at anything over 400FSB at all, although they pass mem test and are abolutely stable in windows @ there rated 400/800mhz at whatever timings.
Sounds like I have a setting wrong somwhere, what do you think?
 
Garyj881 said:
Well what kind of overclock are you trying to achieve on the ram?
Click to expand...

Well the CPU easily does 3.2ghz (400x8) and hence I want to push this further. I cant push this further without raising the FSB even more. There are no dividers under 1:1 on my board so the memory is the bottleneck right now. It might be that the CPU could do 3.4ghz (425x8) but I wouldn't know, as the ram can't boot over 400. I thought I could atleast expect this ram to get to 850mhz. I cant even get it to 810mhz. It's not like its close either...will absolutely NEVER boot over 400FSB.
Any ideas?

EDIT: So what Im saying is it just wont boot if I go over it's rated 800mhz no matter what I try.
 
I have a P35c DS3R and the same ram, by default my board boots the ram at 1.8v ,you need to adjust the DDR overvoltage in bios.I have mine at +0.4 (2.2v everest reads it as 2.1v).
present settings

mem 4,4,4,12 @ 824 mhz ,SMM 2.0 , performance enhance ,standard

it will also run stable at

mem 5,5,5, 15 @ 989 mhz SMM 2.4 with the same DDR overvoltage of +0.4

the Geil memory is rated at 1.9v - 2.3v.I can`t get my board to boot past a stable 420 fsb so you should have a bit of headroom.

Good luck

tommysdad
 
tommysdad said:
I have a P35c DS3R and the same ram, by default my board boots the ram at 1.8v ,you need to adjust the DDR overvoltage in bios.I have mine at +0.4 (2.2v everest reads it as 2.1v).
present settings

mem 4,4,4,12 @ 824 mhz ,SMM 2.0 , performance enhance ,standard

it will also run stable at

mem 5,5,5, 15 @ 989 mhz SMM 2.4 with the same DDR overvoltage of +0.4

the Geil memory is rated at 1.9v - 2.3v.I can`t get my board to boot past a stable 420 fsb so you should have a bit of headroom.

Good luck

tommysdad
Click to expand...


cheers for the help mate.

Did you notice you had to increase FSB Voltage or PCI-e voltage or vcore by much in order to get past 400 FSB on this board? What do you have your PCI Frequency locked on? 100 or 101mhz? Any other settings I should take note of? Seems strange to get a brick wall at 400 bang on.

Cheers
 
Is it possible that to run high FSB of over 400, I would still need higher vcore despite that the CPU would easily be able to clock to the resultant clock speed with lower vcore? i.e. Is there a relationship between achieving high FSB and vcore requirment assuming a CPU was well within the limits of its clockability?

What I mean is, I have already tried higher FSb with CPU multi turned down to x6 so I know the CPU can clock that high on even less voltage. Perhaps this is my board that is the limit and not the ram?
 
smsmasters said:
Has anyone managed to this RAM to run at 1000MHz but with 4-4-4-12 timings? Just tried it at 2.3V and it wouldn't even boot.
Click to expand...

I had 2 sticks running 950mhz @ 4-4-4-12 with 2V
Currently running 4 sticks @ 4-4-4-12 @ 800mhz with 2V (didnt think it would but oh well :))
 
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