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OCZ intros PC3-14400

Robert Hallock July 19, 2007 1:08 PM ET in Tech

Using 8/8/8 timings and a happy helping of VDIMM, OCZ has introduced their blistering fast PC3-14400 memory. The memory has a theoretical bandwidth ceiling of 28.8Gbps, however the Intel bus for which these are designed are limited to the 9Gbps range. Boy howdy are these fast though, and we’re covering them because they’re currently the fastest production DIMMs in the world.

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21 Comments:

  1. Your Amish Daddy
    Banned
    19 Jul '07, 3:15 pm

    Damn that's nice. What's the vDimm?

  2. Robert Hallock
    Cad
    19 Jul '07, 3:18 pm

    1.9v. Standard DDR3 VDIMM is 1.5v.

  3. Your Amish Daddy
    Banned
    19 Jul '07, 3:32 pm

    Oh yeah, that's some DDR2 range. Wonder if I could get some for my psp..

  4. RWB
    Thank God for Blue Monsters
    19 Jul '07, 7:14 pm

    I've been out of the loop, but I would venture a guess there is a point where memory bandwidth at high timings does nothing for gamers where needing that information quickly is key, memory bandwidth is nice, but I guess it's kinda like having 512MB of dedicated memory on a TNT2 card... it's just bragging rights at that point, it's just not balanced enough.

  5. Robert Hallock
    Cad
    19 Jul '07, 8:20 pm

    Timings mean nothing when you have that much bandwidth.

  6. RWB
    Thank God for Blue Monsters
    19 Jul '07, 9:23 pm

    Got anything to back that up? I wouldn't know to be honest, but I'd sure like to.

  7. Robert Hallock
    Cad
    19 Jul '07, 9:37 pm

    http://www.digit-life.com/articles2/...mma-page3.html

    DDR2 at 5/5/5 only wins by 500Mb/s over equally-clocked DDR3 at 7/7/7. Now, given that DDR2 can't come close to the speeds DDR3 is reaching, we can now see that timings don't matter.

  8. RyderOCZ
    OCZ Guru / IC Groupie
    19 Jul '07, 10:30 pm

    A little more in depth too: http://www.thetechrepository.com/showthread.php?t=160

  9. RWB
    Thank God for Blue Monsters
    19 Jul '07, 11:33 pm

    Just to be sure I get the object of this post first... this new memory runs a base of 720MHz? Which seems to be would put this memory in the red zone of that chart showing in the link Ryan posted.

    Of course another part says the actual speed hasn't been posted...

  10. Robert Hallock
    Cad
    19 Jul '07, 11:41 pm

    PC3-14400 / 8 = 1800 (This is the chip type, AKA DDR3-1800).
    1800 / 2 = 900MHz (This is the bus clockspeed).
    900 / 4 = 225MHz (This is the memory clock).

    DDR2 bandwidth was (MEM MHZ) * 2 * 8.
    DDR3 bandwidth is (MEM MHZ) * 4 * 8.

    And this is the primary benefit of DDR3, it has 4 cycles per clock instead of 2 cycles with DDR2.

  11. RWB
    Thank God for Blue Monsters
    19 Jul '07, 11:47 pm

    Interesting... that kinda alters the table they show in the thread Ryan posted... unless I can translate...

  12. Robert Hallock
    Cad
    19 Jul '07, 11:53 pm

    Not really, no. The "Memory clock" is the speed of the chips themselves, separate from any quad-pumping of the bus and is really an obscure thing. For all intents and purposes, you can consider the "Bus clock" the working frequency of the stick just like 500MHz on DDR2 (PC8000) was really 500MHz.

    You can see that when you divide the "PC ratings" in his chart by 8, you get the DDR spec, and when you divide that figure by 2, you get the classic frequency put in the DDR2 frame of mind we're all used to.

  13. Your Amish Daddy
    Banned
    20 Jul '07, 2:41 am

    Where can I get some CL3 DDR2 800?

  14. RyderOCZ
    OCZ Guru / IC Groupie
    20 Jul '07, 8:06 am

    Who is Ryan?

    The link I posted was to demonstrate total latency as related to memory speed and timings. You can see in the chart that as you clock higher, you can still achieve the same overall latency at various CAS settings, etc. When DDR3 emerged, it started at DDR3-1066 and 1333 with a CAS latency of 8 or 9. Already you can see that we have come a long way from that and of course there is overclocking too, so when you buy a CAS 7 or 8 module, you still may achieve CAS 6 at XX speed through overclocking which could put you in the green on the chart.
    Overall latency is what matters to your applications, not the MHz/CAS setting of the ram. Keep the overall latency as low as possible and you have the best results.

  15. RyderOCZ
    OCZ Guru / IC Groupie
    20 Jul '07, 8:15 am
    Quoting Your Amish Daddy

    Where can I get some CL3 DDR2 800?

    Here: http://www.ocztechnology.com/product...lexxlc_edition

  16. Robert Hallock
    Cad
    20 Jul '07, 8:17 am

    What's the MSPR on a 2GB kit of PC3-14400, anyhow? ~$450?

  17. RyderOCZ
    OCZ Guru / IC Groupie
    20 Jul '07, 8:24 am
    Quoting Thrax

    What's the MSPR on a 2GB kit of PC3-14400, anyhow? ~$450?

    No idea just yet, hopefully they will pass this along to me.

  18. RWB
    Thank God for Blue Monsters
    20 Jul '07, 10:08 am
    Quoting RyderOCZ

    Who is Ryan?

    The link I posted was to demonstrate total latency as related to memory speed and timings. You can see in the chart that as you clock higher, you can still achieve the same overall latency at various CAS settings, etc. When DDR3 emerged, it started at DDR3-1066 and 1333 with a CAS latency of 8 or 9. Already you can see that we have come a long way from that and of course there is overclocking too, so when you buy a CAS 7 or 8 module, you still may achieve CAS 6 at XX speed through overclocking which could put you in the green on the chart.
    Overall latency is what matters to your applications, not the MHz/CAS setting of the ram. Keep the overall latency as low as possible and you have the best results.

    haha sorry, lack of sleep this past week... omg I could have slept in today as it's my day off but I have to help my aunt move(4hrs. DING!)... when I see your name Ryder I think Ryan... RyanOCZ.... this if your new name, like it.

  19. Your Amish Daddy
    Banned
    20 Jul '07, 4:37 pm

    Only CL3 on Nvidia 680i. I don't wanna have to replace my board to get cl3.

  20. Leonardo
    F@H Reign of Terror is back!
    20 Jul '07, 11:13 pm

    Not to be a smartass, but...then don't replace your board and don't get DDR3. It's just like the transition from DDR to DDR2, it requires a new motherboard architecture.

  21. RyderOCZ
    OCZ Guru / IC Groupie
    20 Jul '07, 11:34 pm

    Leonardo,

    The thread is about DDR3, but Y.A.D. asked about CL3 DDR2 for his system

    Quoting Your Amish Daddy

    Where can I get some CL3 DDR2 800?

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