800Mhz or 1066Mhz DDRII for Intel Q9450? Tags: Memory Product Last response: December 12, 2007 10:54 PM in Memory Share tomsonman December 12, 2007 6:09:11 PM Have a question. Building a machine for Q9450 (till february will have E6750). I will not OC the machine, just want pure stability and quality of all the components. Now, my question is: Q9450 has 1333fsb, what DDRII memory should fit here, 800Mhz or 1066Mhz? (I will not OC) Mobo will be Asus P5K-E. (Not shure what it means for 1066Mhz DDRII becouse it says "The chipset officially supports the memory frequency up to DDR2 800MHz. Tuned by ASUS Super Memspeed Technology, this motherboard natively supports up to DDR2 1066MHz" More about : 800mhz 1066mhz ddrii intel q9450 Maziar a b } Memory December 12, 2007 6:24:57 PM DD2 800(even if u wanted to OC, i would recommended DDR2 800 because the difference isnt much and DDR2 800 OCs very well too) Crashman a b } Memory December 12, 2007 6:33:53 PM I'd get Crucial Ballistix DDR2-800. It actually supports higher speeds and lower latency than any competing-brand DDR2-1066 I've tested. Related resources The Best Board for a Intel Core 2 Quad Q9450 ? - Forum 4-4-4-12 , 5-5-5-15, 800 or 1066mhz ...??? - Forum need help... DDR2 800MHz to @ 1066MHz ? - Forum DDR2 1066Mhz or 800Mhz - Forum ddrII 667 vs 800 on a 1333Mhz Fsb - Forum Can't find your answer ? Ask ! Get the answer zenmaster December 12, 2007 6:35:22 PM I would look at DDR2-1066. You would want to reach at least DDR2-1000 Speeds to start pushing the OC limit of that chip. DDR2-1000 will put it just under 4.0 Ghz. Folks were hitting this on 1.4v on some tests I saw and that was with reasonable temps. That would mean that the Low 4.x Ghz should be doable if your ram is fast enough. I'm not sure what the FSB walls of that Mobo is, however. You may want to research a bit. tomsonman December 12, 2007 7:00:24 PM But I WILL NOT overclock, becouse I need the machine rock solid for audio production. tomsonman December 12, 2007 7:06:55 PM What about the CL4 and CL5 difference? I was thinking GEIL 2x2Gb 800Mhz CL4 DDRII. Is that a good choice in my case? Crashman a b } Memory December 12, 2007 7:36:23 PM Crucial Ballistix DDR2-800 is rated CAS 4 as well. tomsonman December 12, 2007 7:50:25 PM Is there a difference in my case if getting CL4 over CL5 ? What is actually difference between two? zenmaster December 12, 2007 8:04:18 PM If you are not going to OC, then DDR2-800 is perfectly fine. You will not notice a difference in the RAM. tomsonman December 12, 2007 8:13:25 PM Ok, tnx for your help. lafontma December 12, 2007 8:39:24 PM Actually if you arent overclocking and want a 1:1 memory/bus ratio you dont need anything above DDR667. So basically anything 667 and above will be fine. Crashman a b } Memory December 12, 2007 10:16:18 PM tomsonman said:Is there a difference in my case if getting CL4 over CL5 ? What is actually difference between two? CAS 4 has a 20% faster response time than CAS 5. This has minimal effect on most programs, since CAS 5 is already so quick at DDR2-800 cycle times. tomsonman December 12, 2007 10:24:31 PM So there is no sense of buying CL4? (the price diference is 20€) As I'm building this comp for using it with VSTi's (Software Instruments) which works above all with memory, is there maybe an effect in this programs like Cubase, Nuendo ... ? Crashman a b } Memory December 12, 2007 10:54:37 PM I know that some programs show larger performance gains from lower latency memory, but I'm not sure which programs are affected. Too bad you don't get U.S. prices, I was recommending Ballistix in part because 2x1GB costs around $60 here. Can't find your answer ? Ask ! Publish Related resources : ForumIs 2gb ddr2 running at 1066mhz in dual mode better than 3gb at 800mhz ForumUpgrading an Alienware Q9450 - or new build? ForumDDR2 RAM: Better performance with 5GB @ 800MHz or 4GB @ 1066MHz ? ForumOverclocking DDR2 from 800Mhz to 1066Mhz , is it worth the risk? ForumPC2 - 8500 1066mhz being read as PC2 6400 800mhz ForumDDR2 PC2 8500 1066mhz read as PC2 6400 800mhz Forum[CHANGED] thoughts about gaming build ForumWant to overclock my Q9450 to 3.2. Should I change my memory? ForumWant to OC a q9450 to 3.6ghz ForumQ9550 and q9450 rig suggestions anyone? ForumNo RAID access on Sabertooth z77 ??? ForumRecommend new MB for Intel E6600 Please ForumIntel Pentium D935 with P5ND2 SLI ForumEmaxx Intel P35 Pro ForumLooking for a SLI and 1066mhz ram supporting motherboard More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !