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Thread: Best OC RAM?




  1. #1
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    Everyone always says XMS3500, but is there really much difference between that and say Samsung or Micron PC3200?

    PC3500 is twice the price of PC3200
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  2. #2
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    Theres quite a difference actualy, Samsung makes decent RAM as well though. PC3500 gives you more room for overclock, and being able to keep extreme timings.

  3. #3
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    Corsair's XMS line has always given me better results at more aggressive timings than anyother brand.

  4. #4
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    But then some say to go with Kingston HyperX, or OCZ gold lines. I'd say it takes some luck to get a really good one.

    :cheers: to luck....
    [size=9If there's a pensieve fear, a wasted year, a man must learn to cope.
    If his obsession's real, suppression that he feels must turn to hope - DT

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  5. #5
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    The absolute highest OCers right now are mostly running OCZ Gold. Many use Corsair XMS, including myself. It isnt cheap stuff, my 2x256 XMS3200LLPT was $162 :eek:.

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  6. #6
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    I'm currently running my 2x256MB XMS 3500 at 400Mhz with CAS 4-2-2 CL2 timings. They cost but they shure deliver the goods too! :p

    PCMark2002: 5066

    3DMark2001:
    15807

  7. #7
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    Mine is Kingston 3200 cl2.5 (i think they're value ram) but i can push it to 213 (426 ddr) with 2-2-2-5 timings---> takes a good NB cooling tho.

    A crazy guy did a voltmod (done on the mobo) so his value ram can reach 3.4v (or more). So far he got 7000 in Sandra membench, with more than 300 fsb. CRRRAAAZZZZZYYYY....

    He told me most winbond 5 chip can do that (again, i'd say with luck)...

    [size=9If there's a pensieve fear, a wasted year, a man must learn to cope.
    If his obsession's real, suppression that he feels must turn to hope - DT

    rig:
    P4C800-Deluxe 2.8 C (+Vantec Aeroflow)
    Sapphire 9700 Pro
    4x256MB Kingston KVR400C25
    Audigy 2
    2x80GB Maxtor DM9 RAID 0
    Enermax 433W
    ALL AIR, no Vmod

    3DMark2001 = 20954
    3DMark2003 = 6038
    Sandra Mem = 6028/6018[/size]

  8. #8
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    Quote Originally Posted by benny_mankin

    He told me most winbond 5 chip can do that (again, i'd say with luck)...

    My RAM is WinBond chips, and it was PC3200, but it ran a 230FSB @ 2.5-3-3-8 @ 2.9V

  9. #9
    Join Date
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    I noticed this thread is a couple weeks old now but I had some input so here it is:

    First of all.....I've noticed that people have a tendency to buy more than they need for many applications. Don't waste your money buying Corsair XMS3500 if your going to run it on a 133MHz FSB!!! Gimp is running a nice overclock on a 1000MHz system to bring it up to 1400MHz but I seriously doubt he would get any benefit out of RAM capable of running at 500MHz!! You really need to buy the RAM that is best suited to your system for maximum value and performance.

    As far as brands go, I Have some Corsair XMS3200 and some Samsung PC2700 running on nearly identical systems. Both ASUS A7N8X dx (NForce2) mobos. One with a 2400+ and one with a 2500+. Since the 2400 defaults to a 133MHz FSB you can run some good quality PC2100DDR (cheap) and sync it with the FSB for maximum performance. The 2500+ runs at 166MHz so PC2700 would be the correct choice for such a system. This is ideal for a default configuration.

    HOWEVER!.......:D

    If you are reading this forum then chances are you would like to push those values somewhat to improve performance. An often overlooked technique for simple overclocking is to tweak your FSB to sync it with some higher speed RAM and leave the core speed of the CPU alone by backing off on the multiplier. This allows you to overclock your system without increasing the heat generated by the CPU so you don't have to install a fancy aftermarket HSF!! :cool: Most late model Athlons will run very well at a higher FSB with no increase in voltage demand or heat and no loss of stability. The result is greater memory bandwidth and greater overall performance with the same CPU core speed. Everyone is soooo obsessed with clocking the CPU they forget about how to really improve performance.

    My systems......

    I matched the Samsung PC2700 DDR with the 2400+ and tweaked the FSB from 133 to 166MHz and backed off on the multiplier from 15x to 12x to maintain a 2.0GHz core on the CPU. The RAM now runs in sync with the FSB providing a 20-25% memory bandwidth improvement. The CPU maintained the same temperatures with the stock HSF. Overall system performance was noticeably faster even with stock timings of 2.5,3,3,7.

    I matched the Corsair XMS3200 to the 2500+ and tweaked the FSB from 166 to 200MHz. With the lower latency timings of 2,2,2,5 and synchronized frequency I am able to achieve memory bandwidth of 3000 to 3100KBs which is very close to the theoretical max of 3200 for that configuration. I also overclock the CPU and use an aftermarket HSF but that's a different story.

    I also upped the DDR voltage to 2.7 on the Corsair as recommended by the manufacturer.

    I have maxed the 2500+ system out at 210MHz FSB but did not see any measurable performance improvement over 200MHz and I am very close to the instability point of 215MHz (for this system) so I don't bother. I could possibly relax the timings to improve my FSB overclocking potential but again the benefits would not outweigh the drawbacks. If I had XMS3500 RAM I could likely achieve the FSB higher while maintaining stability and low latency timings so I would probably benefit with this (2500+)system. Obviously XMS3500 would be overkill on the other (2400+) system.

    The point is faster RAM may or may not be beneficial so be careful what you spend your hard earned money on. Of course while RAM prices may be on the increase it could be prudent to pick up a couple high end sticks now and use them for a while until you get around to purchasing a new mobo and CPU to really wind them out.
    ASUS A7N8X Deluxe, Athlon Barton 2500+ with SLK-800 and 4800rpm 80mm fan, ATi 9700Pro(AIW), Dual 256MB Corsair XMS 3200c. Seagate Barracuda SATA. 200MHz fsb with 11X multiplier, RAM latency: 2,2,2,5

  10. #10
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    Well, ya, that I agree, but the multiplier thing cannot be applied to Intel systems, and with those, u can take the benefits of having high performance RAM.
    I remember that even the newest the DDR500 (now Geil even has the 533 :wow: ) sticks were built with "Intel systems in their mind".

    Nice writing tho..

    :cheers:
    [size=9If there's a pensieve fear, a wasted year, a man must learn to cope.
    If his obsession's real, suppression that he feels must turn to hope - DT

    rig:
    P4C800-Deluxe 2.8 C (+Vantec Aeroflow)
    Sapphire 9700 Pro
    4x256MB Kingston KVR400C25
    Audigy 2
    2x80GB Maxtor DM9 RAID 0
    Enermax 433W
    ALL AIR, no Vmod

    3DMark2001 = 20954
    3DMark2003 = 6038
    Sandra Mem = 6028/6018[/size]

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