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Ram: CL3 667mhz or CL5 1066mhz

post #1 of 9
Thread Starter 
This is a tough one I think personally, what would I benefit more from?

Mushkin XP2-5300 with timings of 3-3-3-10 @ 667mhz
or
Corsair TWIN2X2048-8500C5D with 5-5-5-15 @ 1066mhz

The Corsair one is the "Dominator" type of memory, which costs a little more but it doesn't matter as long as it's at or below €375 for a 2GB set. 1GB module in each system and later I buy another set of 2GB. So what are your thoughts?
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post #2 of 9
What processor is it going to be paired with?
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post #3 of 9
Thread Starter 
X2 3800, planning to reach 2.6-2.7 on air.
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post #4 of 9
Quote:
Originally Posted by Acoma_Andy
X2 3800, planning to reach 2.6-2.7 on air.
I would go with the lower clock/tigher timings then. AMD's seem to like that more.
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post #5 of 9
the ddr2-667,
I wonder If you can get DDR2-800, that is like a 2:1 ram to fsb

but nonetheless, amd like tight timings, like fishie36 pointed out
 
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post #6 of 9
No point having RAM run faster than the CPU really, since the RAM can only use what the CPU hands it. Best to have it running 1:1
    
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post #7 of 9
DDR2-667 CL3 performs better than DDR2-800 CL5 in AMD systems and even in C2D systems. This is a little table I did to see what performs better: (1 being the fastest and 6 the slowest)

1. DDR2-800 CL3
2. DDR2-1066 CL5
3. DDR2-667 CL3
4. DDR2-667 CL4
5. DDR2-800 CL5
6. DDR2-667 CL5

Tests were done on a E6600. Some of them are pretty close so not much difference e.g. between DDR2-800 CL5 and DDR2-667 CL4. And also between DDR2-1066 CL5 and DDR2-800 CL3. Hope this helps

--Edit--

The only other main one I am missing is DDR2-800 CL4, I think it would go in between the 667 CL3 and CL4
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by adam144
No point having RAM run faster than the CPU really, since the RAM can only use what the CPU hands it. Best to have it running 1:1
What exactly do you mean with this? If I set my BIOS to run DDR2 at 800mhz effective and start overclocking from there, there would be too much bandwith for the cpu to catch up?
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post #9 of 9
Quote:
Originally Posted by Acoma_Andy
What exactly do you mean with this? If I set my BIOS to run DDR2 at 800mhz effective and start overclocking from there, there would be too much bandwith for the cpu to catch up?
That was somewhat true back in the days of DDR but with DDR2 it doesn't really apply anymore.
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i5 2500K Asus P8P67 EVO GTX 980 16GB DDR3 1866mhz 
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