Rick Perez said:
I'm using 4 sticks of Corsair PC3500 256 that weren't matched or
paired, running at cas 2 on a MSI 875P. Running a 2.6 @ 3.2 without
any problems.
Internal clock: 3201.86 MHz
System clock: 246.30 MHz
System bus: 985.19 MHz
Multiplier: 13
Bios: v1.8
This is really hard to believe !!!
If set at ratio 1:1, your Corsair 217 (434) MHz rated memory should run in
cas2 at 246 MHz without any problem...
Professional testers like
www.bit-tech.net write the following after testing
the (paired) Corsair DDR3500 modules:
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As expected, when running at the manufacturers rating, the memory performed
perfectly. Unfortunately, when it comes to overclocking, the memory turned
out to be expectedly limited. Allowing only a 3MHz increase in speed taking
it up to 220MHz. Although this was achieved using aggressive timings,
relaxing the timings made no practical difference. The system would boot
into Windows XP at 222MHz but was very unstable. (An unstable overclock is
no overclock at all).
Max Memory Speed Best CAS Latency Timing
220MHz (440MHz DDR) 2 - 2 - 3 - 6 - 1T
Conclusion
The memory does what it says on the box. It runs perfectly at 217MHz,
(434MHz DDR), with aggressive timings. This makes it one of the fastest
modules currently available. Unsurprisingly, this leaves very little
overclocking headroom, less than 1%. Arguably, this makes it unattractive to
overclockers but in reality this memory is capable of running at higher
speeds than most people can currently reliably obtain from their systems. As
such, most purchasers can be confident that it is not their memory holding
them back in the overclocking stakes.
To realise the full benefits of this ram it needs to be run synchronously
with the CPU FSB. In other words the CPU FSB should be the same speed as the
ram., (200MHz - 220MHz). This is difficult to achieve with stability for
most current systems. Owners of nForce 2 motherboards and unlocked Athlons
who can run at 200MHz FSB synchronously will see the best results from this
memory.
A final point, the data sheet implies that only one memory module should be
used. The memory specification can not be guaranteed when using multiple
modules. Corsair is producing a range of matched module pairs designed to be
used together. In the end this module from Corsair gives you get what you
pay for, high performance RAM that does what the manufacturer claims. Just
don't expect to overclock it!
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