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What memory for Q9450 overclocking? DDR2 800 or 1066

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February 9, 2008 1:11:03 AM

Hi,

Is DDR2 800Mhz (4x1GB) enough for a heavy overclock on an X38/X48 motherboard? A few forum posts said you would need about 1000Mhz DDR2 to reach around 3.8Ghz on the Q9450. The below memory links both have reviews that they overclock quite well. However is it worth paying extra for 1066 vs 800? I found 4x1gb of the DDR2 800 version for $80 vs $160 for 4x1gb of the 1066.

http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=8A...
http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=D4...

Thanks
February 9, 2008 1:53:17 AM

well, you can overclock the memory too
February 9, 2008 2:05:49 AM

Hi. Well yes, I was planning to overclock memory as well to help with the Q9450 overclock. But what I was asking was if I should go with the 800Mhz or the 1066Mhz as a starting point. Again though, 4x1gb for 800Mhz is $80 vs $160 for 4x1 of 1066Mhz.
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February 9, 2008 3:36:04 AM

Find out what FSB you're going to be setting the quad to. For example, If you were to set it to 450, then you would either want DDR2-800 that can easily hit 900Mhz (450x2) or DDR1066 that you downclock to 900.

I don't see you pushing it a whole lot more than that, then again the multiplier sucks on the Q9450. DDR2-800 in my opinion.
February 9, 2008 10:09:13 PM

your probably not going get the fsb any where near 533 so if you used 1066, it would have to be underclocked, but if you get the fsb higher than 400, then the ddr2 800 would have to overclocked as well... so it depends how much you want to overclock, and remember: the less things you have to overclock to get what you want, the better it is.
February 10, 2008 12:13:38 AM

As per the below review, it seems the Gigabyte X48-DQ6 can reach 545 FSB when using an QX6700:
This motherboard also supports DDR2-1200Mhz memory, so I could go even higher then 1066Mhz memory if needed.

  1. In our overclocking tests we did a double whammy but for reality sakes we only included one set of overclocking results in our tests. We tested the board using the DES both enabled and disabled. With DES enabled our overclocking limited us to just over 502MHz FSB; this is where we found instabilities when the CPU wanted to rush to full speed, the voltages just weren%u2019t stable enough to handle this with the DES enabled. Running with the DES system disabled we managed to get 545MHz out of the board which was a lot better than our X38-DQ6 using DDR2 memory. It seems Intel has done a good job picking these chipsets from the batches.
  2.  
  3. Important Editor Note: Our maximum overclocking result is the best result we managed in our limited time of testing the motherboard. Due to time constraints we weren%u2019t able to tweak the motherboard to the absolute maximum and find the highest possible FSB, as this could take days to find properly. We do however spend at least a few hours overclocking every motherboard to try and find the highest possible overclock in that time frame. You may or may not be able to overclock higher if you spend more time tweaking, or as new BIOS updates are released. %u201CBurn-in%u201D time might also come into play if you believe in that.


http://www.tweaktown.com/reviews/1271/5/page_5_bios_and...
February 10, 2008 1:06:46 AM

even if the fsb is that high, the system wont run at that speed, even if it did, the vcore would be so high that running it for long periods will damage it. as for the q9450, unless your trying to run it at 4 ghz, the fsb will be lower than 500, at fsb 400 it will be 3.2, and at fsb450 3.6.
it you want no more than 3.2, ddr2-800 would be the best choice. any more than 3.2 means overclocking ddr2-800 or under clocking ddr2-1066.
February 10, 2008 1:25:47 AM

What ram would be needed for a goal overclock of 3.66Ghz/3.80Ghz? I think for 3.8Ghz you would need 475FSB, which on this motherboard, looks to not be a problem. As I said, this motherboard supports up to DDR2-1200, so you can go with 800/1066/1200. Was looking to go with 4GB of whatever ram speed is needed.
February 10, 2008 2:17:37 AM

Overclocking 4GB of RAM @ 1200MHz might be more trouble than you think. It sounds like you guys want huge overclocks so be smart and get DDR2 1066 for the ultimate overclock, its better to have more headroom.
February 10, 2008 2:23:06 AM

I'm planning to do a build with the same CPU and looking at running 4ghz at a 500FSB, right now I'm pretty much decided on this ram:

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231145


These will do 1:1 at that speed stock. They also make DDR2 800 in this model as well if you choose to go that route for slightly cheaper. Getting faster ram and then underclocking might give you additional room to tighten timings as well.
February 10, 2008 2:39:26 AM

nope, 50$ more is not worth it. with ddr2-1000, you can overclock the cpu (q9450) up to 4.0 ghz without overclocking the memory.
February 10, 2008 2:46:20 AM

imrul said:
nope, 50$ more is not worth it. with ddr2-1000, you can overclock the cpu (q9450) up to 4.0 ghz without overclocking the memory.


The cost is way more then $50... in fact, it is $75 more. So not worth it at all for just 66 extra Mhz.

G.SKILL 4GB(2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) : $189.99
G.SKILL 4GB(2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1000 (PC2 8000) : $114.99

This forum has 11 pages worth of posts about the G.SKILL DDR2-1000Mhz. It seems to max out at about 1150Mhz.

http://www.xtremesystems.org/forums/showthread.php?t=16...
February 10, 2008 2:47:48 AM

Some G Skill memory, such as the PC6400, uses micron chips. But the G Skill PC8000 uses the inferior powerchip chips. Also here is more on G.Skill PC8000 from the unhappy folks that have bought it: G.Skill PC8000 Reviews

If you are looking for 2x2GB, might I suggest the
MUSHKIN 4GB(2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1000 (PC2 8000) Dual Channel Kit Desktop Memory Model 996593-REDLINE - Retail Cas Latency: 5
which uses the real deal, micron D9GMH chips?

Lastly, here is a good RAM reference: ramlist.ath.cx
February 10, 2008 2:59:41 AM

That must be why the G.SKILL DDR2-1066 2x2GB set costs $75 more then the G.SKILL DDR2-1000 2x2GB set. It would seem it has the higher quality micron chips, but you pay a lot extra for it.
February 10, 2008 3:18:26 PM

those mushkins look delicious
February 10, 2008 3:33:08 PM

c0llin said:
those mushkins look delicious


Too bad they aren't 1066. :pfff: 
February 10, 2008 5:38:48 PM

I bet they'd run 1066 no problem.
February 11, 2008 2:46:58 PM

Called G.SKILL and was told that the 2x2GB DDR2-1066 set uses the same memory chips as the 2x2GB DDR2-1000 set. He said they don't use micron chips as they don't last longer then six months?
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