Work in progress - just rerunning everythig with 7/7/7/14....pics coming very soon
OC Report: Cellshock DDR3 1866 BLUE D9JNL
I have spend some quality time with a very nice set of Cellshock's newest line of DDR3 and was amazed to find out what nicely binned and matched Micron D9JNL can do. Unlike the Micron D9GTR which is scaling extremely well with Vdimm , the D9JNL chips are really shining at low Vdimm by outperforming the D9GTR chips at equal voltages. The Micron D9JNL chips, which most benchers consider to be inferior, are actually needing 0.1V - 0.2V less for equal clocks.
The Memory:
Part number : CS3222770
Capacity: 2GB-Kit (2x 1GB)
Configuration: 128Mx64 DRAM Micron Device
Config: 128Mx8 PCB 240pin
Module Info: unbuff. non-ECC, DDR3 DIMM
Speed: PC15000
CAS Latency: 8-8-8-16
VDIMM: 1,7V-2,0V
Warranty: 5years
The test setup:
OS: Windows XP SP2
CPU: Intel Xeon E3110 – air cooled
Mobo: Asus Maximus Extreme – Bios 9.05 - NB water cooled
PSU: PC Power & Cooling 750W
GPU: NVidia 9600GT / 9800GX2
HDD: Gigabyte I-Ram
The Windows XP installation is 100% bone stock without any tweaks, with the exception of having Large System Cache enabled for 32m runs.
The testing was done with the mindset for stability for Super Pi as well as 3D- and PC-Marks and NOT for max results ( for now...)
Secondary timings are often not tweaked to perfection – often these are too loose. For example tRFC could probably have been tigher at lower mhz - and really needed lossening up at high mhz
I have to revisit all my CAS6 results and post them later.[/INDENT]
Memory Bandwidth Results:
Everest Mem Read :2000mhz 7/7/7/14 @ 2.06V
Everest Mem Write: 2000mhz 7/7/7/14 @ 2.06V
Everest Copy: 2000mhz 7/7/7/14 @ 2.06V
Everest Latency: 2000mhz 7/7/7/14 @ 2.06V
3DMark Results:
3Dmark05
VDimm = 2.1V 7/7/7/14 1T @ 2000mhz
Asus P5E3 Prem. / 9800GTX all default settings
PC Mark Results:
PCMark05 memory suite
VDimm = 2.1V 7/7/7/14 1T @ 2000mhz
Asus P5E3 Prem. / 9800GTX all default settings
NOTES:
-Actual Vdimm was about 0.01V higher than set in BIOS – all above Vdimms are BIOS set ( so +0.01V for real value )
-This set of Cellshock DDR3 scales very well until 2.07V but at 2.11V it errors out hard to and refuses to boot had high clockspeeds.
-The max CAS7 clocks were done with 2.09V , but in memtest already a lot more errors were showing than when running 2.07V.
-This set does not like different CAS and tRCD timings, which I believe is common for this type of micron chips – hence the 7/7, 6/6, 8/8 timings used.
-Unfortunately CAS 6 results suffer a bit compared to D9GTR equipped memory, due to D9JNL's problem with handling higher voltages, which are needed for great CAS6 results.
-The Microns D9JNL allow running very tight Tras - 7/7/7/12 timings are possible to be run at almost the max clocks ( with between 4-16mhz hit in max frequencies compared to Tras 21), Tras 14 appear to be quickest for SuperPi 32m, Tras 12 is about 10 seconds slower compared to Tras14; Tras21 is about even with Tras 14
Cellshock DDR3 1866 compatibilty:
I have tested the Cellshocks on three different boards – the Asus P5E3 Premium ( X48), the Asus Maximus Extreme (X38) and on the EVGA 790I board. On all boards the memory ran without a hitch – but the X48 board really made this memory shine. Unfortunately I lost the board at the beginning of the testing due to extreme NB degradation and am not able to run with this board past 450FSB at this point.
I had pushed too much VNB; 1.89-1.91V on the P5E3 Prem. (with a very brief stunt of 1.97V to see if helps when things started going bad...to make things really really worse ...lol), while air cooling... ouch !
The Maximus now is on water cooling – which helps out greatly!
Memory Clocks were about 5-20mhz higher on the P5E3 Prem. vs. the Asus Maximus Extreme.
The X48 also allowed me to run 7/7/6 with tighter secondary timings, whereas the X38 board did not appear to like these primary timings at all.
The 790i is a decent performer, but the Intel chipsets are a bit better in terms of memory performance. Max mem clocks were also bit lesser for me on the EVGA 790i compared to the X38/X48 boards. I did not spend too much time on the 790i since massive OS corruption problems on this board ( Rev C0...hint) took all the joy out of memory clocking. With more tweaking I assume similar max memory clocks might be achievable.
Final thoughts
Compared to what Vdimm is necessary to match such clocks with older D9GTR Micron based memory, this trend is certainly a step forward for the real world user. Only for benching FSB limited Quad Core CPUs it could be preferable to have D9GTR based memory, where good sets can allow you to bench in the 1800+ region with CAS 6 timings. Something I still would love to also have in my arsenal.
All in all I really love this Cellshock set, it is a match made in heaven for a 24/7 high performance rig. The speeds that are obtainable with low voltages make them truly perfect for a insane gaming rig and/or bench systems which are running at the max all the time. Being able to run 1900mhz CAS 7 for my daily settings is more then I hoped for, especially without having to worry about potentially degrading the memory.
This set does not like different CAS and tRCD timings, which I believe is common for this type of micron chips – hence the 7/7, 6/6, 8/8 timings used.
Unfortunately CAS 6 results suffer a bit compared to D9GTR equipped memory, due to D9JNL's problem with handling higher voltages, which are needed for great CAS6 results.
Yep, that's the problem with JNLs. They don't like too much volts and they can't run tight timings. Other that that they are nice, certainly better than other chip makers
edited thanks - I got it off the cellshock website - and guessed some of it the values - thanks a bunch!
Quote:
Originally Posted by kiwi
Yep, that's the problem with JNLs. They don't like too much volts and they can't run tight timings. Other that that they are nice, certainly better than other chip makers
I know what you mean - but actually the perfromance hit appears to be minor. 24/7 performance is really what amazes me here, and you'll blow GTR away with this type of Micron chip at equal vdimm.
But I am also still hunting for some 6/5/5 godness. Unfortunately my Corsair Dominators 14400 C7 got damaged in shipping - and now I have no more voltage loving DDR3 - at least none that is running
nice thread mike!
im really amazed you managed to get that mem running stable at 2ghz cas7
i dont know if this kit is clocking better than average... i never tested any kits at 2ghz cas7, so i dont know how many kits can do this.
Looking forward to seeing more results from other guys
What surprised me even more is that you got it stable at higher speeds on an x48 than on a 790 board or did i get that wrong?
Quote:
Originally Posted by BenchZowner
I have a "feeling" telling me "those JNL will do a lot better at 6-6-5-18 than 6-5-5-18
well 665 didnt work for me, only 666. the only below jedec spec timings that worked for me was 776, all other timing combinations didnt really bring a clockspeed boost. D9JNL loves tight tras tho, in my testing 2 or more clocks tighter than D9GTR
and yes, the kit is brand new, more and more shops should have it now
I have take it today and now testing with my P5k3 dlx
1800 cas 7-7-7-21 T1 1,95 volt work well play crysis
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I have take it today and now testing with my P5k3 dlx
1800 cas 7-7-7-21 T1 1,95 volt work well play crysis
only? ah, thats a 1800 kit not an 1866 kit you have there right?
Quote:
Originally Posted by BenchZowner
Speak of the devil
Sascha check some kits for 7-7-7-x @ DDR3-2000.
I have a feeling that you'll find lots of them being stable at this freq/timings.
hmmm idk man... i guess the boards here must be limiting me... every kit i test runs a lot faster on the system of whoever i send it to
then again, i dont tweak the kits, i dont have time to find the sweet spots for every kit, i just need to seperate the great from the good kits, for that the boards still seem to work well, but i guess at higher speeds they hold me back... how much did you gain from modding your p5k dlx boards? think i should give it a try?
then again, i dont tweak the kits, i dont have time to find the sweet spots for every kit, i just need to seperate the great from the good kits
Hmm that statement and a few prior (on other threads) to the same intent held me back on trying out these new blue modules, in fear of receiving only a "good" kit, as all the "great" ones are distributed to the reviewers and PRs...
Would hate to receive a pair that was only "average" compared to my four 1800 CellShock modules and a farcry from the performance of those cherry picked samples.
Was refreshing MemoryC site for it to start selling them for the past 2 weeks... oh well..
Anyone has a retail kit to try out?
nothing personal by the way, just disappointed.
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Quote:
Originally Posted by creidiki
We are a band of fearless modern-day alchemists who, for fun, run solutions through sophisticated, if overpriced, separator setups, and then complain when we succeed in separating said solution.
Last edited by eternal_fantasy; 04-19-2008 at 11:33 AM.
Reason: Added the last sentence
its good to see some people finally recognizing that ram doesnt need huge voltages. if it OC's well... who cares how little voltage it responds to?
I certainly dont want to run 2.3 volts into my ram to hit 2100 mhz stable, if I can do it at 1.9 volts.
(thats a hypothetical comparison - just saying)
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Quote:
"The command and conquer model," said the EA CEO, "doesn't work. If you think you're going to buy a developer and put your name on the label... you're making a profound mistake."
Hmm that statement and a few prior (on other threads) to the same intent held me back on trying out these new blue modules, in fear of receiving only a "good" kit, as all the "great" ones are distributed to the reviewers and PRs...
Would hate to receive a pair that was only "average" compared to my four 1800 CellShock modules and a farcry from the performance of those cherry picked samples.
Was refreshing MemoryC site for it to start selling them for the past 2 weeks... oh well..
Anyone has a retail kit to try out?
nothing personal by the way, just disappointed.
Normally manuf' dont do that... I dont think Cellshock does neither, but ofcause i dont know...
Think its safe, atleast when using same chips.
Quote:
Originally Posted by Kunaak
its good to see some people finally recognizing that ram doesnt need huge voltages. if it OC's well... who cares how little voltage it responds to?
I certainly dont want to run 2.3 volts into my ram to hit 2100 mhz stable, if I can do it at 1.9 volts.
(thats a hypothetical comparison - just saying)
Yada yada yada... Its the chips.. GTR is vdimm hungry, GTS a little less.. JNL / JNM (same just 78 ball), they need alot less vdimm...
- But apart from the electricity bill, who cares..? : - )
And if one wants low voltage ram, micron isnt the better choice... You've seen the 900mhz (DDR3-1800) at 1.5v, right? Retail specs...
how much did you gain from modding your p5k dlx boards? think i should give it a try?
Hey Sascha,
Increasing the Vmch over the max in BIOS 1.7V gave me the following:
1) I could run a lower performance level than my previous best at the given FSB freq + DRAM Divider
2) Helped me gain stability in high frequencies ( past DDR3-2000 )
3) Helped my FSB overclocks on some CPUs...just a bit, nothing outrageous.
Hmm that statement and a few prior (on other threads) to the same intent held me back on trying out these new blue modules, in fear of receiving only a "good" kit, as all the "great" ones are distributed to the reviewers and PRs...
Would hate to receive a pair that was only "average" compared to my four 1800 CellShock modules and a farcry from the performance of those cherry picked samples.
Was refreshing MemoryC site for it to start selling them for the past 2 weeks... oh well..
Anyone has a retail kit to try out?
nothing personal by the way, just disappointed.
Maybe You misunderstood saaya - I think what he calls "only" a good kit will be labeled to 1800 and the "great ones" to 1866.
Might be the same procedure as done by labeling a chip - i.e. an 8200, 8400 and 8500 comes from the same production line, after testing the "great ones" will be labeled to 8500.
...lol), while air cooling... ouch
! 
some of it the values - thanks a bunch!
- and now I have no more voltage loving DDR3 - at least none that is running
Linear Mode
