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Help me find the right corsair ram for my new 650i system!

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January 11, 2007 8:38:57 PM

I'm building a new system, core 2 duo, 650i motherboard, but what RAM should I get?

Corsair's website gives me a long list of supported modules.

I guess the three I'm looking at right now are:

TWIN2X2048-6400C4D ($304) *Before $40 MIR
TWIN2X2048-8500C5D ($369)
TWIN2X2048-6400C3DF ($477)

It looks as though the 6400C4 sticks are all using Promos now :( 

The 8500C5D's are still hand-picked Micron chips, as are the 6400C3's (although $477 is pretty expensive)

See here: http://ramlist.ath.cx/ddr2/
And here: http://forumz.tomshardware.com/hardware/corsair-dominat...


Any recommendation's?



I opened this topic in the wrong section by mistake, so I'm moving it here.

For reference, the old one is here:

http://forumz.tomshardware.com/hardware/Help-find-corsa...
January 12, 2007 10:39:51 AM

This is an awesome deal, use promo code EMC109BALLISTIX2GB and there only $266. I belive they use hand pick D9's as well. Better hury though, the deal ends in 3 days.
January 12, 2007 5:49:24 PM

I used the OCZ platinum DDR2-800's and they run at 4-4-4-12 at 2.1V easily. Have not tried to run them higher yet. I only paid a little over 220$ for them.


Edit: i have the Asus P5N-E Sli board as well.
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a b } Memory
January 12, 2007 5:59:37 PM

If you are still interested in the Corsair, personally I would pick the 6400C4s or the 8500s if the C3 is out of budget. If you intend to OC at 1:1, the PC6400s are still good up to and usually well past 800mhz. We are seeing them hit 900-1000mhz although that's past the official rating. If you want to use the memory upclock ratios, then the 8500 is great on that board.

If you go with another brand, good luck with your build and OCing 8)
January 12, 2007 7:36:28 PM

Fortunately for Corsair I purchased the 8500's shortly before retiring to bed last night - only to awake this morning to apt403's post.

I don't mind spending a little bit more for a better product - but I hate wasting money. I've always bought Corsair ram, and I'm running 3200 2-2-2-5 right now, so I'm not new to spending a lot on ram either. I just hope the difference in price relates to something.

I'll be sure to post my results here as soon as my new hardware arrives - hopefully I won't have spent over $100 for some nifty heatsinks.
January 13, 2007 4:18:00 AM

Sorry to hijack but if you replace memory heatspreaders does it void the warranty? BTW that crucial memory looks delicious =/ (it has LEDs!)
January 13, 2007 10:33:43 AM

Quote:
Sorry to hijack but if you replace memory heatspreaders does it void the warranty? BTW that crucial memory looks delicious =/ (it has LEDs!)



Yeah, im kicking myself for not waiting on my ram, i bought my curret 2gb set of super talent ram for the same price.

Between the Crucial and Corsair memory there pretty much the same price without the rebate, so your paying more for...um...nothing. Is there anyway that you can cancel the order?
January 14, 2007 4:19:27 AM

Quote:
This is an awesome deal, use promo code EMC109BALLISTIX2GB and there only $266. I belive they use hand pick D9's as well. Better hury though, the deal ends in 3 days.


That's a good deal :D 
January 18, 2007 6:50:27 AM

I recieved my 8500's and my 650i board (Asus P5N-E SLi) - The install went well, everything seems to be working, but I do have a question about that corsair ram:

Under CPU-Z it shows as only running at 6400, although the latency is still 5-5-5-15. So 5-5-5-15, at a frequency of 533. What is the frequency supposed to be? 1066 right?

I was under the impression it would be 1066, and 1:1 with my CPU (which FSB is also 1066).



Does this look right?
a b } Memory
January 18, 2007 2:16:23 PM

What you are seeing there is the SPD tab. That is simply the "generic" or JEDEC compliant timings programmed into the SPD to allow the memory to boot with a variety of MOBOs at the bios defaults. Your actual speed is shown under the memory tab.

Keep in mind that your CPU FSB is 266mhz. PC6400/DDR800 runs at 400mhz but tranfers data 2 times per cycle. So, you get a dual data rate of DDR800.

If you run your system at stock speeds at 1:1, you will be running the memory at 266mhz or, DDR533. You will need to manually overclock the CPU and/or use the dividers ( aka - ratios ) to get your memory to run at 533mhz or DDR1066/PC8500.
January 18, 2007 8:44:32 PM

Sorry about that. Here's the correct memory tab from CPU-Z, although it looks wrong also.

Am I right in saying that instead of running at 5-5-5-15 as they should be, they're operating at 5-5-5-31? And at only 399Mhz instead of 533Mhz?

Is this something wrong with the bios? It's a brand new board but corsair's website does list it as a supported board for this ram.

Image attached below:

a b } Memory
January 18, 2007 8:58:51 PM

Quote:
Am I right in saying that instead of running at 5-5-5-15 as they should be, they're operating at 5-5-5-31? And at only 399Mhz instead of 533Mhz?
"IF" CPU-Z is reading the info correct, then yes, the bios has set 31 for tRAS. In any event, you should set these timings manually in the bios. And, yes your memory is running 399mhz because your MOBO is set up to use a 2:3 divider and the FSB is at 266mhz. As I said, you'll need to OC to get the memory to 533mhz.
January 18, 2007 11:52:37 PM

I'm still having some trouble, I brought my CPU up to 3Ghz without issue. The motherboard seems to think that 333Mhz bus at 5:4 that should be 1066Mhz on the memory. Unfortunately it freezes loading windows.

If I bring my RAM down to 3:4, it runs at 444Mhz, and I can take the CPU up to 3.3Ghz, and it's still loading into windows - so I think it's the memory that isn't making it.

My motherboard doesn't have a 2.2V setting on the memory either, it's 2.17V or 2.259V. I left it on auto for now so it might be using an even lower setting, which one should I be using?

Here's some more screens from CPU-Z:

a b } Memory
January 19, 2007 12:11:40 AM

Set it manually to either setting, 2.17v or 2.259v if 2.17v fails. You should not be having issues at the memory with that speed. Set your memory for unlinked and enter 1066 manually with the CPU at stock.
January 20, 2007 5:20:25 AM

Turns out it might have been the North Bridge that was causing the instabilities with the RAM, not sure why. I increased my ram voltage to 2.259V, and the NB. voltage to 1.563V

My system is now stable at 3Ghz, with the ram at 4-5-3-12, and 533Mhz.

I followed the instructions outlined here for overclocking the memory: http://www.tomshardware.com/2007/01/18/overclocking-guide-part-1/page4.html

The system wouldn't pass post at 3-5-5-15, it reached windows but didn't pass my stability testing at 4-4-5-15 (system rebooted during Lost Coast stress test with Prime95 in the background), and similarly at 4-5-3-10.

Picture included with Super PI 16M test and 3DMark 06 Score:

!