Dual-Channel & FSB: Calculating The Bottlenecks (Is Dual Channel Worth It?)
Dec 2009: Re: Where can I find these Antec drive bay adapters? Tech Support Guy is completely free -- paid for by advertisers and donations. Dec 2009: Re: Fuck...No by Onide... 29. How can we tell if his mobo/pc has gone into Dual Channel mode? http://webtrekkie.com/dual-channel/dual-channel-ram-in-single-channel-mobo.php
For example, is the I/O of 800 MHz FSB basically 4 bytes x 800 MHz (3.2 Gig / sec)? Adding memory will usually speed the bejeebers up out of a system. 2. Hes got two 512MB sticks of RAM in there, both DDR333, the mobo supports upto DDR400 RAM. pepsi_max2k Seniorius Lurkius Registered: Nov 24, 2007Posts: 5 Posted: Sat Nov 24, 2007 3:41 pm quote:Prototyped: that was the best explanation of the relation between FSB and memory I've ever seen. you could try here
I know dual channel mode works because the computer has actually worked with dual channel a few lucky times. Now, this delay is expressed in terms of memory clock cycles, so with DDR2-533 CL4 memory, we're talking about 4 cycles / 266 million cycles per second = about 15 nanoseconds. Dec 2009: Re: Fuck...No by Onide... 29. Core2's are very good at hiding memory latency, and are pretty insensitive to memory speeds as far as actual application performance goes.Common case is probably overlapping transactions hitting an open page,
I'm currently waiting for funds to buy a 1066 bus speed processor. Even the newest Phenom processors can use any DDR2 down to DDR2-400.quote:I'm currently trying to decide whether to purchase some DDR-667 (5-5-5-15) or DDR-800 (5-5-5-12). Stay logged in Welcome to PC Review! on 05.
I'm currently waiting for funds to buy a 1066 bus speed processor. Each stick is being read with its own controller and the data is being pulled simultaneously each at 200, resulting in a clean 1:1 with the processor's FSB. TechSpot Account Sign up for free, it takes 30 seconds. http://www.techspot.com/community/topics/dual-channel-ram.5943/ read the ram guide in the guides forum.
Similarly at a "DDR2-667" setting it'd try to use an 8x divider, so at 3.0 GHz it'd end up trying to run the memory at 375 MHz. What would be the proper ratio when I get the 1066 processor when I get it for the 667 memory?(I think I worked this out already, but would like someone to Do you know the rules here? THANKS!
No, create an account now. It's loaded with real-world advice presented in a concise style that clearly delivers just the information you want, without your having to hunt for it. sf1 Seniorius Lurkius Registered: Dec 2, 2007Posts: 1 Posted: Sun Dec 02, 2007 2:50 pm Hi I am new here,I am trying to get a 1:1 ratio for my Athlon x2 If the motherboard's BIOS insists on a ratio, you can use 4:5 (FSB:mem), though leaving it on automatic should do the trick as well.
It would barely even notice memory speed if the code loop is under 4mb.... http://webtrekkie.com/dual-channel/dual-channel-ddr-ram.php Since the bus speed is "quad pumped" to get the fsb speed, the fsb is faster than the memory, it does not get "outraced." 10-17-2009, 05:30 AM #15 greenbrucelee The 10% extra bandwidth at 733 MT/s is probably not worth the 20% extra cost. DDS Logs: Flash Player for Edge Malicious software removal tool how to print attachment already...
Once upon a time, it was always a good idea to try to match your memory speed to your FSB speed; decoupling them was always bad for performance. Or is it 64 bits (8 bytes) wide? my2centsClick to expand... have a peek here Dec 2009: Re: A Questionable Question About Caps by sugie... 29.
I'll see cpuz refer to things like FSB:memory as "1:2", which I'm not sure refers to the memory controller taking advantage of the up and down side of the clock waveform, There are several cases I've wanted to install memory in pairs to achieve dual-channel memory speeds, but I've come across a caveat or two about whether or not this is worth Dec 2009: Re: Fuck...No by Agent... 29.
noob question here, I just got confused by this.
tgm1024, Oct 14, 2009 #5 Sponsor This thread has been Locked and is not open to further replies. Dec 2009: Re: off group question by Al-hp... 29. One stick may have timings to respond to the other stick. the psychosomatic effect of knowing that you have dual-channel could well explain any attribution to it.Click to expand...
And the few experts who have run the benchmarks conclude that dual channel is not significantly faster. Gigabyte mobos should auto sense Dual Channel memory, however it wont work unless the memory sticks are the same size. 2x256 or 2x512. Basically they are tested to be same timing so they work well together. Check This Out These processors derive their memory controller's clock rate from the processor's clock speed. (This processor clock speed is in turn determined by the HyperTransport bus that feeds off the system clock
If you dual channel or triple channel or whatever, you are multiplying the width of the spreadsheet, so that data can be accessed quicker. Someone had specced out a 6750 (1333 FSB) with 800Mhz RAM, and using my older knowledge, I told him that I thought a 6700 (1066 FSB) with 1066 RAM would probably dijo Ars Scholae Palatinae Tribus: Toronto Registered: Nov 3, 2003Posts: 622 Posted: Sun Nov 04, 2007 9:48 am Prototyped: that was the best explanation of the relation between FSB and memory dual channel Matt Anderson, Jan 5, 2005, in forum: DIY PC Replies: 15 Views: 567 Mitch Crane Jan 7, 2005 Bottlenecks Jure Sah, Jul 20, 2006, in forum: DIY PC Replies:
Thanks a bunch! Dec 2009: Re: Windows XP CD will not recognize existing installation by peter... 28. How do I calculate whether or not the FSB is fast enough to take > advantage of the memory speeds. Sign Up Now!
If there is a memory bound application, whether or not it is grabbing 10% of the stick of memory, as long as it is exceeding data cache it is going to Well I have a 256 and a 512 also.. even setting to 533 gives something like DDR551??? btw, the brands are diffrent.
The "Bearlake" P35/G3x/Q3x/X38 chipsets support DDR2-533 through DDR2-800.