Notices

Overclockers Forums > Hardware > Memory
Memory
Forum Jump

DDR3 1600 vs DDR3 2000 in the real world

Post Reply New Thread Subscribe Search this Thread
 
 
Thread Tools
Old 04-29-09, 12:32 AM Thread Starter   #1
FuriousGeorge
Member



Join Date: Mar 2004

 
DDR3 1600 vs DDR3 2000 in the real world


I just got my ci7 and Asus Rampage II today, but my impression thus far is that those super high ram speeds may be an overclocking bottleneck.

Depending on my settings, I can run my mem at 2Ghz if my CPU is at 2.86Ghz, 3Ghz, 3.33Ghz, or (I think) 3.5 Ghz.

Then, if I allow my memory speed to drop to around 1.91Ghz I can get my CPU up to 4.03 Ghz... but my QPI / DRAM Voltage is at a too-hot-for-comfort 1.56V.

I get the impression that if I lower my bclck ratio by a multiplier or two and mem speed by a divisor that I could achieve the same speed, with a faster bclck, but slower mem (around 1.7Ghz)...

So can someone tell me how real the advantage is of DR3 2000 over DDR3 1600 if it means taking the block from say 200 to 191? Is a waste of time and an unnecessary strain on the CPU?

__________________
DFI LANPARTY Ultra B NFII
Athlon XP-M 2600+ @ 133mhz X 19 = 2.54 ghz (i know)
Thermalright SI-97 w/ 2 fans.
FuriousGeorge is offline   QUOTE Thanks
Old 04-29-09, 12:51 AM   #2
Evilsizer
Senior Fourm Spammer


 
Evilsizer's Avatar 

Join Date: Jun 2002
Location: Austin,Texas

10 Year Badge
 
RW difference is zero, but in super pi it would be a good little boost. when i was checking out tri vs dual reviews. they showed that DDR3-1066 cas7/8 in tri mode as near DDR3-1600 cas8 in dual for bandwidth. i took the middle road and hit up DDR3-1333 cas7 sticks so that in terms of bandwidth should be at or slighlty higher then DDR3-1600 in dual more. now the other thing is that tri mode doesnt offer much over dual in the way of RW results. for setting WR's for speed and benches tri mode is great. the other thing is after chatting with mate about i7 and ocing. that in dual channel mode you can get away with less votlage. since the imc is on the cpu now and with tri mode ram, the imc is more worked then in dual mode. guess the question is, if you dont notice the difference from DDR3-2000 vs DDR3-1600 can you live with it? either that or can you live with dual channle mode for the higher ram speed? in either case in RW your not going to notice it.. you can buy a fast car but the speed limit is still 65mph on highway.

__________________
i7 920@3.6ghz | Asus R2G | GK F3-12800CL7D-4GBRH | Galaxy GTX660 GC | C650TX | OCZ VERTEX EX 120GB, VERTEX 250GB
i3 330m | Jetway NF98 | 2x2gig DDR3-1066 | pico 120WI
i5 2450 | Jetway JNF9G-QM77 | 2x2gig DDR3-1333 | WIP
"I Love To Camp!"
"Commensing Shock Therapy!"
I'm jonnyGURU of jonnyGURU.com and we don't overload PSU's - JonnyGURU

HeatWare
Evilsizer is offline Heatware Profile   QUOTE Thanks
Old 04-29-09, 09:52 AM   #3
Froggy
Member

 
Froggy's Avatar 

Join Date: Sep 2003
Location: Ca

10 Year Badge
 
Here is a great expose on your dilemma.

Link

__________________
Travis

Haswell, Kepler, & MLC

My HeatWare 74-0-0
Froggy is offline Heatware Profile   QUOTE Thanks
Old 05-07-09, 03:39 PM   #4
3oh6
Member

 
3oh6's Avatar 

Join Date: Aug 2007
Location: London, ON Canada

 
Quote:
Originally Posted by Evilsizer View Post
RW difference is zero, but in super pi it would be a good little boost.
i have to agree. with i7, anything over DDR3-1600 seems to be a waste in the real world aside for benchmarking or perhaps a couple specialized apps here and there (CAD type stuff). i have been doing a lot of motherboard reviews and i have been using them to do all kinds of benching at various memory frequencies and timings.

the results are always the same...the same. what the OP is running into is likely the IMC being stressed too much to run high mem clocks and CPU at the same time. increasing VTT "should" alleviate that but you only want to go so high with VTT.

you can see a lot of my benching results at hardwarecanucks.com...just look up the motherboard reviews. the EVGA X58, Classified, and DFI all have a pretty good comparison between memory sets.

__________________
living life 32M digits of Pi at a time...
3oh6 is offline   QUOTE Thanks
Old 05-09-09, 05:52 PM   #5
Malakai
Disabled

 
Malakai's Avatar 

Join Date: Dec 2001
Location: Fl

 
Remember you will likely be able to drop your timings some going from 2ghz to 1.6... considering you are getting more cpu speed, and lower timing memory from the deal, it is certainly worth it in my book =)
Malakai is offline   QUOTE Thanks
Old 06-28-10, 10:12 AM   #6
kazu5535
New Member



Join Date: Jun 2010

 
Quote:
Originally Posted by Malakai View Post
Remember you will likely be able to drop your timings some going from 2ghz to 1.6... considering you are getting more cpu speed, and lower timing memory from the deal, it is certainly worth it in my book =)
Can you please tell me who is that on your avatar picture?
kazu5535 is offline   QUOTE Thanks
Old 07-01-10, 03:49 AM   #7
hollowtek
Registered

 
hollowtek's Avatar 

Join Date: Jun 2010
Location: central california

 
Quote:
Originally Posted by kazu5535 View Post
Can you please tell me who is that on your avatar picture?
that's a typical crazy anime character. i bet he's out to destroy humanity

__________________
1090t - Asus Crosshair III usb3 - OCZ ddr3 1600 BE - Sapphire HD 5850 - Corsair 850tx - CoolerMaster Hyper 212+ - CoolerMaster HAF 922
hollowtek is offline   QUOTE Thanks
Old 07-01-10, 03:55 PM   #8
Yellowbeard XMS
Official Corsair Tech Support

 
Yellowbeard XMS's Avatar 

Join Date: Oct 2004

 
My rule of thumb has ALWAYS been;

NEVER SACRIFICE CPU SPEED TO GET MORE MEMORY FREQUENCY.

If you can get both great but CPU cycles are what actually do the work.
Yellowbeard XMS is offline   QUOTE Thanks

Post Reply New Thread Subscribe


Overclockers Forums > Hardware > Memory
Memory
Forum Jump

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Mobile Skin
All times are GMT -5. The time now is 07:44 PM.
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
You can add these icons by updating your profile information to include your Heatware ID, Benching Profile ID or your Folding/SETI profile ID. Edit your profile!
X

Welcome to Overclockers.com

Create your username to jump into the discussion!

New members like you have made this the best community on the Internet since 1998!


(4 digit year)

Why Join Us?

  • Share experience
  • Max out your hardware
  • Best forum members anywhere
  • Customized forum experience

Already a member?