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Build Advice £850 First Build - Advice pleeaaase!

Discussion in 'Hardware' started by Nubble, 9 Jan 2010.

  1. Xonar

    Xonar New Member

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    I just did an online search and it appears I'm correct about the voltages, any more and it'll damage the controller on the CPU. I think there's a warning comes with the motherboards warning not to give them anymore than 1.65v.
     
  2. PureSilver

    PureSilver E-tailer Tailor

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    Sorry - I didn't check the memory carefully enough and you're absolutely right - 1.8v is far too high. As you suggest the maximum suggested memory is 1.65v (although most people running 1600MHz at XMP run 1.66 without any issues), though that's not an absolute; there's a BiT article somewhere explaining the actual voltage issue.

    Sorry OP :blush:
     
  3. Nubble

    Nubble New Member

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    eh...had to be the £20 dearer version didnt it :(

    will i be able to cancel/change the order before its sent off on monday...im guessing so.

    its a shame that there is no way to cancel it from within the site itself :\
     
  4. Xonar

    Xonar New Member

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    Ah there you go, glad we cleared it up. It's a hard thing to spot, I only pointed out as I myself made the exact same error last week. They really should list it more suitably that it won't run at it's full speed using an i5/i7 system. I'm sure there's a lot of people out there running that RAM fine but not realizing that it's being throttled back.
     
  5. Nubble

    Nubble New Member

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    I've sent an email to CUSTOMPC now, so hopefully they'll rectify the error in future magazines :)

    Thanks for help guys, guess I'll just phone up scan on monday morning.
     
  6. smc8788

    smc8788 ...at least I have chicken

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    Just drop Scan an e-mail or give them a ring on Monday morning and ask them to remove it from your order. It shouldn't be any problem, I've done it before as they don't start processing orders until Monday morning.

    Then just order this set, it's much cheaper than the Corsair one from Scan.
     
  7. mycopia

    mycopia New Member

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    I am about to pick up a very similar system, only differences would be p55a ud3r mobo, sapphire vapour x 4890 gpu and a 650w be quiet dark pro psu.

    My question is do these memory sticks work well with this motherboard, should i follow custompc's recommendtion of Corsair Dominator xm3 pc3-12800, or get the ripjaws which help my wallet and do the job?

    It is the memory choices to put in this system that are causing the most headaches and whether they work well with the mobo that i am considering ie not bought yet.

    So if any pointers and guidance can be put my way it would be most appreciated!!!

    ps - decided with p55a because of issues with burnt cpus on earlier foxconn socket motherboards and not interested in multiple gpu's and on an atx size board.
     
    Last edited: 10 Jan 2010
  8. Aracos

    Aracos New Member

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  9. wyx087

    wyx087 Homeworld 3 is happening!!

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    you are correct in saying that the maximum voltage is 1.65v for the RAM's.

    but i am telling OP that my RAM, exact models, 2 sets of it, works perfectly at 1.55v. so there is no reason to buy a £20 dearer one.

    the 1.65v is the voltage difference between internal memory controller and memory voltage, came from 1.1v default IMC voltage. when you overclock and rising the memory controller voltage, you can also rise the memory voltage.
     
  10. Xonar

    Xonar New Member

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    The point I'm making is, the RAM the OP linked requires 1.8v to run at 1600Mhz. Now if what you say is true, and you have that exact model, how can you be running it at 1528Mhz with only 1.55v? This would only be possible using the RAM i linked earlier. Are you positive you have the exact same RAM as the OP.

    Also the RAM in your sig is running at 8-8-8-24, the model the OP is referring to runs at 9-9-9-24 so this again leads me to believe you have a different kit.
     
  11. wyx087

    wyx087 Homeworld 3 is happening!!

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    the RAM sticks is running at the following speeds perfectly rock solid, done at least 3 memteset passes on each: (all tests are done using 4 sticks)
    1333 7-7-7-21 1.5
    1450 8-7-7-24 1.55
    1508 8-7-7-24 1.6375
    1520 8-8-8-24 1.55
    1600 9-9-9-24 1.55

    and i am positively sure i have the exact same model as i bought them. i started up with i5 750 and Asus motherboard before Intel's release at end of August 2009, no Intel i5/i7 memory was released, so i bought those Dominators.

    edit: see my thread: http://forums.bit-tech.net/showthread.php?t=173953
     
  12. Xonar

    Xonar New Member

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    Do you still have the box? If so you can check the code on the back (or possibly using CPU-Z i'm not sure if it displays it) to verify the part number.

    It should read either 'TW3X4G1600C9D' or 'CMD4GX3M2A1600C8'
     
  13. Moyo2k

    Moyo2k AMD Fanboy

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    Switch out that GTX 260 now... The 4890 is cheaper and will kick the silicon crap out of it
     
  14. Nubble

    Nubble New Member

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    niceone will do - thanks :)
     
  15. wyx087

    wyx087 Homeworld 3 is happening!!

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    TW3X4G1600C9D on the box, CM3X2G1500C9DHX on CPU-z part number.

    believe me, the 1.65v memory are either just marketing hype created by memory manufacturers. or because most of manufacturers have crap memory chips that doesn't have a large enough overhead, only works at specified voltage.

    i known from experience that Corsair always puts an overhead on their XMS memory, so i took the gamble and bought Dominators, which turns out to have a HUGE voltage overhead. had it running 1.3v 9-9-9-24 1528Mhz for a while no problem.
     
  16. Nubble

    Nubble New Member

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    so what your saying is that I can definately use the memory I have already ordered (and that custompc magazine is not wrong about recommending the 1.8v memory to be used in a core i5 system)?
     
  17. Xonar

    Xonar New Member

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    It could be possible. I was having a think and it may be the case that as you purchased the memory when i5/i7 were not in full release that you purchased memory that was listed at 1.8v but, nowadays, would have been put aside as Core i5/i7 stock due to it's ability to run at it's specified speed at only 1.65v, as required by P55/X58 motherboards. I reckon you must have been extremely lucky in getting a kit capable of this but nowadays if you were to by the same kit, chances are it wont be capable of the same speed/voltages as all the good chips will be kept aside as i5/i7 stock.
     
  18. Xonar

    Xonar New Member

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    Nubble, you can use the memory you have purchased, it will work as all DDR3 is required to run at only 1.5v due to the JEDEC spec, but may only run at 1066 or 1333Mhz, anymore will require an increase in voltage above 1.65 which Core i5 CPu's arent designed to do. Better to buy a kit that you know will run at it's specified speed rather than buying a 1600Mhz kit that you will have to downclock.
     
  19. smc8788

    smc8788 ...at least I have chicken

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    You could do, but the other low voltage stuff is £15 cheaper anyway so it's worth the hassle of a short phone call/e-mail IMO.
     
  20. wyx087

    wyx087 Homeworld 3 is happening!!

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    indeed.

    there is nothing wrong with those RAM. Corsair is a company of quality, won't screw you over. but if you can be bothered to phone them up, might as well save £15.
     

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