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Corsair XMS2(5400) and E6600

post #1 of 14
Thread Starter 
I dont know much about overclocking memory or setting a good ratio between cpu and memory. I basically want to overclock my cpu around 3.0ghz and have it with a good ratio with my memory.
This is a my memory
Tw1l!ght
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Tw1l!ght
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post #2 of 14
1:1 FSB is best but I dont think youll have enough head room on your memory FSB to get to 1:1 probably 2:3 or 4:5 would be a good starting goal.
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My System
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Core 2 Duo E6400 Asus P5N32-SLI Premium (Nforce 590) Sapphire Radeon X1950XT 256MB 2 X 1GB Corsair XMS2 Dominator PC6400 
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Western Digital Caviar RE 16MB Cache 160GB SAMSUNG 18X DVD±R NZXT 500 Watt NZXT Lexa Classic 
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post #3 of 14
Thread Starter 
I dont know about memory overclocking. How would I go about finding a good ratio with my cpu and memory
Tw1l!ght
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Tw1l!ght
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post #4 of 14
You cannot overclock that memory very far, the most and stable that I'd recommend, its' the 1:1 ratio as suggested as well before.

Why? Because "IF" you were to use a 334fsb with a 4:5 ratio, then the RAM would be going above its rated speed and unfortunately the RAM you have may or will perhaps not able to handle such speeds as the RAM itself does not have good overclocking ICs.

That ram that you have, I used to have a kit myself and was able to overclock it to 450mhz (from its 333mhz) but I was using 2.30v and 4-4-4-10 timings.

Again, you may or may not get the same results but the least you can do try and it if it fails, you know what it'll be.

In order to reach 3.0ghz, you'll have to use a 334mhz fsb which means x9 (the multi) = 3.0ghz.
Now, for the speed and ratios, this it what it'll be:
334 for CPU and 664mhz for RAM = 1:1
334 for CPU and 835mhz for RAM = 4:5
334 for CPU and 1002mhz for RAM= 2:3

If you can pull the 4:5 ratio, then it'll be great, so try it if you want to overclock the memory. 2:3 would never happen.
post #5 of 14
Thread Starter 
how do you determine the ratio, like if I had my cpu at 2.7ghz, how would go about determining what the mhz should be in the memory to get the diff ratios
Tw1l!ght
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Tw1l!ght
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i7 920 Asus P6T Deluxe Sapphire 4850X2 GSKILL 3GB DDR3 1600 
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2 x 74GB Raptor Samsung 22X CD/DVD Burner XP PRO Samsung T220 22" 
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post #6 of 14
How do you determine the ratios? Well, you set a CPU speed and then RAM speed, after that you boot the system and check CPU-Z and write it down and next time you are fiddling with the CPU and RAM's frequencies you check and that way you'll know at which ratio you will boot...........but that's "IF" and "when" the RAM is able to handle that ratio, otherwise it could be a wall.

At 300 there's 1:1, 4:5, 2:3, 3:5 and 1:2 ratios with the RAM frequency set at 600mhz, 750mhz, 900mhz, 1,000mhz and 1,200mhz and most likely you won't be able to pass the 3:5.
post #7 of 14
Thread Starter 
do you have a good tutorial for overclocking intel cpu and ram?
Tw1l!ght
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Tw1l!ght
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2 x 74GB Raptor Samsung 22X CD/DVD Burner XP PRO Samsung T220 22" 
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post #8 of 14
No tutorial, just ask and I'll tell.

In a non-fruity way that is.
post #9 of 14
Thread Starter 
Im basically going to run my cpu at 3.294ghz(366fsb\\x9mult) 24/7. What ratio should I set my memory for best performance, or what ratio you would use for best performance.
Tw1l!ght
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CPUMotherboardGraphicsRAM
i7 920 Asus P6T Deluxe Sapphire 4850X2 GSKILL 3GB DDR3 1600 
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2 x 74GB Raptor Samsung 22X CD/DVD Burner XP PRO Samsung T220 22" 
PowerCase
Corsair 750TX Antec 1200 
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Tw1l!ght
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CPUMotherboardGraphicsRAM
i7 920 Asus P6T Deluxe Sapphire 4850X2 GSKILL 3GB DDR3 1600 
Hard DriveOptical DriveOSMonitor
2 x 74GB Raptor Samsung 22X CD/DVD Burner XP PRO Samsung T220 22" 
PowerCase
Corsair 750TX Antec 1200 
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post #10 of 14
Go and do it the safest way, the 1:1 would be the one, I'm not sure the 4:5 could handle it honestly. Your memory is good but "NOT" that good, after all, their ICs are not D9s and that's a factor there.

Just make sure when you set the CPU at 366fsb, the RAM won't go above 900mhz, anything more than that it caused a lock up in my PC and had to reset CMOS, so watch out for that.
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