[MemoryReaction] G.Skill F2-8000CL5D-4GBPQ - Low in cost, high in speed!

[EnJoY]

I've been running this ram in my fathers system at his house at 1100MHz 2.1v since the week after I posted this review and he has yet to get a single bluescreen or crash and he does serious multi-tasking all day encoding video, burning dvd's, surfing the web, and sometimes Folding.

[Dainas]

Not sure about this RAM but 1200 5-5-5-15 can easily be stable at stock volts with many 8500 kits.

Not at this density, these are the first 2GB DDR2 dimms to break 1000. 1GB sticks, yeah for a long long time.

[Cronos]

Try a week to 12 days stability testing.

I've done near a month stability testing and i am pretty sure this memory cannot be expected to work at 1000MHz in 8GB configuration on most if not all P35 boards.

LINPACK is long outdated now, LAPACK is the one to be using for modern core archs and test basis for workstations/servers and still,

HPL Linpack is a standard performance test for supercomputers and clusters. Lapack is a collection of linear algebra subroutines. See the difference?

Memtest, Windows Memory Diagnostic, Prime95 suffice perfectly for testing desktop RAM stability and are the industries long proven methods used worldwide.

Not suffice for me. I want my computer(s) to be fully stable and that means it should be able to pass Linpack.

[tomb18]

Well on the skill web site, these modules are not guaranteed in 8G configurations. They will take RMA's but you may have to do it a lot until you get a set.
I have a set on it's way tomorrow.....I'll hope for the best!

[Cronos]

I have found two sets which, working together, are nearly stable at 1000MHZ. Nearly, but not anyway.

All other fail fairly quickly, this pair takes many hours to fail.

Very smart of G.Skill they don't guarantee 1000MHz for 8GB.

I really need to get my hands on ASUS P5E with its famous dual-phase DIMM VRM and test stability there.

[S1mon-]

I've done near a month stability testing and i am pretty sure this memory cannot be expected to work at 1000MHz in 8GB configuration on most if not all P35 boards.


HPL Linpack is a standard performance test for supercomputers and clusters. Lapack is a collection of linear algebra subroutines. See the difference?



Not suffice for me. I want my computer(s) to be fully stable and that means it should be able to pass Linpack.

I dunno what's the deal with Linpack, but I see you on every thread mentionning the word Linpack for stability...

I mean seriously 2-3 hours of P95 and your most likely settled as for stability

[TyphooN]

I dunno what's the deal with Linpack, but I see you on every thread mentionning the word Linpack for stability...

I mean seriously 2-3 hours of P95 and your most likely settled as for stability

rofl... qft

[Cronos]

I dunno what's the deal with Linpack, but I see you on every thread mentionning the word Linpack for stability...

I mean seriously 2-3 hours of P95 and your most likely settled as for stability

Yea, this type of "stability testing" is the main source of high overclocks, like yours for example.

I am not implying everyone should have the same strict requirements as mine, just want to find
ppl. who have so we can help each other find a way through generally misleading information available everywhere here
and on other OC forums.

[GSKILL TECH]

I have found two sets which, working together, are nearly stable at 1000MHZ. Nearly, but not anyway.

All other fail fairly quickly, this pair takes many hours to fail.

Very smart of G.Skill they don't guarantee 1000MHz for 8GB.

I really need to get my hands on ASUS P5E with its famous dual-phase DIMM VRM and test stability there.

i am sorry to say this but don't you think its your motherboard or other hardware / software is not well design to run 4 sticks of memory at the DDR2 1000

i do see some motherboards runs 2 sticks at DDR2 800 but not 4 sticks.

[Cronos]

i am sorry to say this but don't you think its your motherboard or other hardware / software is not well design to run 4 sticks of memory at the DDR2 1000

I hope so. I have tested on two P35 boards, ASUS P5k-Pro (three of them) and Gigabyte GA-P35-DS3P. These two are the most optimal P35 boards in my opinion.

Both can set tRFC 52, so this is not a problem.

I need to test on P5E. This will basically cover all sane options.

[S1mon-]

Yea, this type of "stability testing" is the main source of high overclocks, like yours for example.

I am not implying everyone should have the same strict requirements as mine, just want to find
ppl. who have so we can help each other find a way through generally misleading information available everywhere here
and on other OC forums.

I agree but that Linpack thing is wayyyyyyyyy overkill to test the stability of a system... I mean no software will rape your PC like P95, let alone Linpack...

[tomb18]

i am sorry to say this but don't you think its your motherboard or other hardware / software is not well design to run 4 sticks of memory at the DDR2 1000

i do see some motherboards runs 2 sticks at DDR2 800 but not 4 sticks.

Today I sent a support question to G. Skill asking if 8GB would work at stock speeds, and if not, would they work at 800MHz on a 680i. Here is my question and their response:

--------------------------------------------------------------
Here is an email that I received today from G Skill asking if 8G is supported:


Sent: Friday, February 15, 2008 5:46 AM
To: ustech@gskill.com
Subject: F2-8000CL5D-4GBPQ question

Hi,

I just purchased 2 sets of this ram to give 8GB memory on an nvidia 680i board.
This board has been running 4G (4x1G) ram no problem at 840mHz.
I will be receiving these memory modules today, and I was wondering if I will have any problems running them at stock specs with 8GB. I have read on xtreme systems that they may not work at stock specs on some systems.

In the event that they do not work at the rated speed, is there any problem running them at a reduced speed such as 800 MHz?

Or, would it be better to exchange them for another set in the hopes that the new set would work?

Thanks for your time.

Reply

Hi
It really depends on the chipset of 680i. Some 680i cannot run 4 sticks at DDR2 800. If your has no problem up to 840mhz, I think there is no problem for 8GB to run at DDR2 800. However, since our asus and evga 680i cannot run 4sticks at DDR2 800, I am not able to verify for you


Thank you

GSKILL USA REP

--------------------------------
Well I guess it is a crap shoot as toi whether you should buy this memory for 8GB or not.
G. Skill should put a disclaimer on their box, or in their advertising, or else rate them down so that 8G will work.
I'll know tonight but so far I'm not too happy.

[Crazy Chuckster]

Anyone have any 1T results with this ram as of yet? I just built an IP35/E8400 combo with some Crucial Ballistix 8500 ram. Looking to move into these and start some OC'ing

[GSKILL TECH]

but 8GB works on other motherboards at DDR2 1000.

some motherboards work but some motherboards don't

like DDR600 TCCD doesn't run at A8N-SLi but DFI works

some motherboard doesn't allow you to change FSB and memory speed, voltage. do you think we are responsible for all the motherboards on the market?

Today I sent a support question to G. Skill asking if 8GB would work at stock speeds, and if not, would they work at 800MHz on a 680i. Here is my question and their response:

--------------------------------------------------------------
Here is an email that I received today from G Skill asking if 8G is supported:


Sent: Friday, February 15, 2008 5:46 AM
To: ustech@gskill.com
Subject: F2-8000CL5D-4GBPQ question

Hi,

I just purchased 2 sets of this ram to give 8GB memory on an nvidia 680i board.
This board has been running 4G (4x1G) ram no problem at 840mHz.
I will be receiving these memory modules today, and I was wondering if I will have any problems running them at stock specs with 8GB. I have read on xtreme systems that they may not work at stock specs on some systems.

In the event that they do not work at the rated speed, is there any problem running them at a reduced speed such as 800 MHz?

Or, would it be better to exchange them for another set in the hopes that the new set would work?

Thanks for your time.

Reply

Hi
It really depends on the chipset of 680i. Some 680i cannot run 4 sticks at DDR2 800. If your has no problem up to 840mhz, I think there is no problem for 8GB to run at DDR2 800. However, since our asus and evga 680i cannot run 4sticks at DDR2 800, I am not able to verify for you


Thank you

GSKILL USA REP

--------------------------------
Well I guess it is a crap shoot as toi whether you should buy this memory for 8GB or not.
G. Skill should put a disclaimer on their box, or in their advertising, or else rate them down so that 8G will work.
I'll know tonight but so far I'm not too happy.

[Praz]

I have to kind of agree with G.Skill on this one. Them posting a disclaimer would be like expecting Intel to do the same with the Yorkfield processors and the 680i. There is nothing fundamentally wrong with the 8GB configuration. It's the motherboard itself that is the deciding factor.

[tomb18]

Yes they do have a point, but on the other hand they should at least post some guidelines as to which motherboards have been tested or not. This would save people a lot of grief.
Also it would be good to provide guidelines in their documentation as to how to configure it for best results on these boards.

[GSKILL TECH]

Yes they do have a point, but on the other hand they should at least post some guidelines as to which motherboards have been tested or not. This would save people a lot of grief.
Also it would be good to provide guidelines in their documentation as to how to configure it for best results on these boards.

that is what i am doing now.
http://www.xtremesystems.org/forums/...81#post2773681

i will have a lot of certify motherboard listed in there.

like which divider you need to use

[tomb18]

Well as soon as my backup is done....I'm popping in the 8G! Heck, forget the backup....Stay tuned!

[Cronos]

that is what i am doing now.
http://www.xtremesystems.org/forums/...81#post2773681

i will have a lot of certify motherboard listed in there.

Can you please prioritize ASUS P5K-Pro ? I have tested it very extensively with
F2-8000CL5D-4GBPQ in 8GB configuration. I have four boards and 8 kits in total.

[Reinvented]

680i works for me... 4 sticks...just up the voltage and make sure you ACTIVELY cool the memory.

[tomb18]

Ok first run! Set the voltage to 2 volts. Auto timing and 800 MHz and put the 8G in...
Disaster! Screen was all garbled and the system hung.
Ok, so I then set auto and linked mode giving me 1050 MHz and the auto timings.
I'm happy to report that so far, boots vista 64 fine, and runs superpi fine.
Timings are now set at 5,5,5,15 (but boots by default at 5,7,7,20)

So CPUZ reports 525 MHz, 2:3 ratio,5,5,5,15,32
Any hints on how to get more?

This is on a nvidia 680i system. The bios is set at linked auto settings for the ram giving 1050 MHz with a 1400 MHz FSB.

So far so good!@!!!!

[Cronos]

Before going "more" make sure this is working. Booting into Windows and running SPI is not really a great achievement.

[tomb18]

Before going "more" make sure this is working. Booting into Windows and running SPI is not really a great achievement.

No kidding.
I have had a few incidents so far.
I tried increasing the speed to 1150 resulting in a lock up. I had to reset my whole cmos and I forgot to set the ram to 2.0V.
It booted, sort of, and then procedded to corrupt by boot tracks for vista.
Luckily in seconds, a repair from the vista cd fixed it right up.
Now I will be trying out linpack. I did a while on prime95 on all 4 cores with no problem but this next step should be interesting.

[Cronos]

First thing you always MUST be doing is memtest86+. Current version is 2.0
http://www.memtest.org/

First pass tests 1-5, if no errors, try test 5 alone 10+ times. To iron out, pass the whole default set of tests 10+ times.

After this, try Linpack 64bit, problem size 30000, 100+ times. Good chance it will find some errors Memtest86+ missed.

P.S.
Don't forget to check the real vDIMM voltage. Many boards overvolt by default. Many ASUS boards overvolt by 0.05V.
And i wish you luck with 680i board, 680i is probably the most troublesome chipset for Intel CPUs.

[the highlander]

where do you get these for $114?

Thanks