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im running 2 256 corsair-xms2700 chips in dual channel on a MSI k7n2g-l that supports 200/266/333 FSB.I have the AMD2500+(thats unlocked-week20 of 03).and in the bios i raised the fsb to 200 left the multiplyer at 11 and raised the vcore from 1.6 to 1.625 and it loaded the os and said it was now a 3200+@2.2ghz but when i tried launching far cry it restarted so i raised it to 1.65 and is running fine.I have a TT 7+ at 4800rpm and cpu idle is 39c and load is 52c.Plays farcry fine,6 hours straight and cpu burn in for over 12 hours.Never reached above 52c.Case temps idle:31c and load 35c.but prime95 gave me an error in less than a minute.How stable is this ram and has anyone ever overclocked 333 past 166fsb?
The default voltage for a 2500+ Barton (assuming it's the desktop CPU) is 1.65v anyway, so you're not overvolting it at all.
Running dual channel mode on a socket A system is a waste...it doesn't hurt, but there's nothing to be gained by it.
Your system will perform better if the CPU & RAM are n'sync (both running at the same speed). It appears that your board doesn't officially support 200mhz/400FSB? <MSI k7n2g-l that supports 200/266/333 FSB>???
Since your CPU is unlocked, you may wanna experiment a little. If you have the option to raise the RAM speed, give it a shot...see if you can get it to run at 200mhz (DDR400). You may have to raise the RAM voltage. If you can't get it to go, your performance may be better if you compromise on your settings...for example, run the RAM at 185mhz (DDR370) & clock the CPU at 12 x 185mhz (2220mhz).
Asus A7N8X-X
1800+ @8x210mhz
512mb PC3200
Ti4200/8X 128mb
WDC 60GB
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Why is dual channel on socket A, a waste?yeah the default bios only supported up to 333 but i updated my bios and the fsb now goes past 200, goes to like 220.If i kept it at 200fsb will it destroy my memory?The highest i can get it using 166mhz fsb is a 2.08 ghz by bumping the multiplyer to 12.5 Couldnt i run asyncronously ?(have the cpu fsb at 200 and have whatever the rams supposed to be at for stability)couldnt i acheive over a 2.2? Im still hella new at overclocking. I get the multipler and fsb but when it comes to memory speeds and timings and ratio's i get lost.thanx for helping me
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I used Corsair XMS PC2700C2, it won't go over 200 Mhz Primetable; like you said it would do fine with many games but not Prime95. It won't do with Doom 3 neither.
I have better luck with Micron and Apacer PC2700 running over 200.
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"Why is dual channel on socket A, a waste?"
This has been discussed many times before. At 200mhz/400FSB, the CPU's bandwidth is 3200mb/sec. PC3200 RAM has a throughput of 3200mb/sec, so that's all that's really necessary.
If you pair up PC3200 in dual channel mode, you theoretically have PC6400 RAM (2 x 3200), but since you're limited by the CPU's bandwidth of 3200mb/sec, running dual channel mode offers no benefit.
Asus A7N8X-X
1800+ @8x210mhz
512mb PC3200
Ti4200/8X 128mb
WDC 60GB
0
Forgot to comment on this --> "Couldnt i run asyncronously ?"
You could do that, but you'll get better performance if you run n'sync. If you do run async, it's better to have the RAM faster than the CPU rather than the other way around...regardless, n'sync is best
Asus A7N8X-X
1800+ @8x210mhz
512mb PC3200
Ti4200/8X 128mb
WDC 60GB
0
So since im running 2 256 chips of 2700 in dual channel wouldnt that make it 5400?
"If you pair up PC3200 in dual channel mode, you theoretically have PC6400 RAM (2 x 3200), but since you're limited by the CPU's bandwidth of 3200mb/sec, running dual channel mode offers no benefit."
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Let me try to explain this again....
On a socket A system at 200mhz/400FSB, the bandwidth*** is 3200mb/sec...that's the maximum data that can be transferred at a time. You could have memory that's capable of handling 10,000mb/sec, but it wouldn't do you a bit of good because all that would ever pass thru it would be a max of 3200mb/sec. The CPU's bandwidth is the limiting factor!
If you had a P4 that runs at 133mhz/533FSB (because it's "quad-pumped"), the bandwidth would be approx 4264mb/sec, therefore dual channel PC2100 (2 x 2100 = 4200) would be the way to go. Both would be running at 133mhz & the CPU bandwidth/RAM throughput would be balanced.
If you had a P4 that runs at 200mhz/800FSB, the bandwidth would be 6400mb/sec, therefore dual channel PC3200 @ 200mhz (2 x 3200 = 6400) would make perfect sense.
***Bandwidth is calculated by multiplying the "effective" FSB by 8, so 400FSB x 8 = 3200mb/sec, 533FSB x 8 = 4264mb/sec, 800FSB x 8 = 6400mb/sec***
Now, to throw another curve at you...even if you had a system that could take full advantage of RAM running in dual channel mode, the gain would be less than 10%.
http://www.sudhian.com/showdocs.cfm?aid=480&pid=1769
Asus A7N8X-X
1800+ @8x210mhz
512mb PC3200
Ti4200/8X 128mb
WDC 60GB
0
OK lol now i get it.Sorry , im still a noob.Thanx for the info.So i HAVE to have 3200.This SUX! I paid like 70 bucks for both sticks and now i have to buy 2 new chips!I just put together my friends kit that he bought. He has a P4 3.2 800fsb 1 mb cache and the MSI 865PE NEO2-PFS Platinum Edition mobo with dual 256 3200 ddr with a FX5700 480W psu and a 120 sata HD.I was going to switch my ram with his but at the time i didnt think i needed it.DAMNIT! he would have never known the difference , he doesnt know anything about computers.How much you think i could sell 2 256 chips of corsair xms 2700 for?
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You don't HAVE to have PC3200....it's very possible your PC2700 will be able to handle 200mhz (DDR400)
Asus A7N8X-X
1800+ @8x210mhz
512mb PC3200
Ti4200/8X 128mb
WDC 60GB
0
I think i'll just overclock to 2.2 when i need to do video encoding but for now i'll leave it at 2.09ghz and leave my ram and cpu at the same fsb which is 166. I dont get anymore errors when i run prime95 so i think it was the overclocking of the ram to 200 is what was giving me errors.I never did up the voltage or mess with the timings when i did though i think they were left on default 7-3-3-2.5 what would you recomend when setting thoses numbers or the dram voltage or the ratio?
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hey jam. I tried that 185fsb X 12 and i had to raise my vcore to 1.650 and its runnin hotter than when i had it at 200fsb.temps were at 40c idle and 52c load and now on this 185 x 12 setting the temp is 47c idle and 58c load.doesnt seem safe to keep it at that setting so im gonna just run it at the ddr3332700 speed 166 x 12.5 @ 1.6v and be happy with a 2 ghz for now until i can get my hands on some 3200.When i make some dvd's i'll overclock it to a 2.2 ghz and run my fan at full speed 6500rpm.brings it back down to 39c idle and 52c load.THANX FOR YOUR HELP
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