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Thread: Prime 95 failing

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    MacDaddy! darrensen's Avatar
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    Prime 95 failing

    Guys,

    Here my current spec. Asus A8N-SLi Premium with 3700 San Diego ( stock cooling )

    My OCing is as follows 260 x 10 with Vcore 1.525

    Temps are 36 idle 44 under load.

    Its failed after around 6 mins. Will raising the vcore make it stable or do i need to do something else? I have not touch the ram settings yet. My ram is Kingston Pc3200 DDR 400. (nothing special)

    Cheers chaps

    Darren

  2. #2
    Senior Member SilentDeath's Avatar
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    Is it memtet86 stable? Do a few passes of test 5 (c, 1, 3, 5, enter, 0) to be sure.

    Are you running a divider on your ram? which one?

    On my dfi nf4 and many other nf4 boards, the option called "ram speed" is often just the divider setting (and the options will be a ratio, not a number), and the acctual speed is the fsb if you havent changed the divider (meaning your ram would now be 260mhz and probably not stable). When booting it also says "DDR 200" if running at 1:1 ratio, for whatever fsb speed you are at, which could be confusing.

    2.6ghz is quite good you can probably get 2.7 maybe 2.8 depending on temps.

    Stick core voltage at 1.6 and see if it makes it more stable. If it is, overclock it a bit further. 1.6v is probably going to be the max you should use for your cooling - I would expect the temps to stay below 55-60°c
    Last edited by SilentDeath; 29-07-2005 at 03:16 AM.

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    • oralpain's system
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    Memtest86+ test #5 should (let it do about 20 passes) find any obvious memory errors.

    Prime95 is far more sensitive to errors with the CPU itself, if your temps are good, more voltage should fix the problem (unless your at the limit of your CPU).

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    MacDaddy! darrensen's Avatar
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    Cheers guys,

    I'll download memtet86 and try that tonight. Its been running "memtest" over night with no errors so im happy with that so far. It's still running now so when i get home tonight at 7pm it would have been running for 22 hours......

    Does memtest 86 test the cpu though? I know prime 95 does a bit of everything.

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    i would guess it need a tiny bit more of vcore

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    MacDaddy! darrensen's Avatar
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    I havnt had a crash yet during windows. Ive been playing games and benchmarking and so far (touch wood) its been ok.

    I happy with 2.6 on stock for the moment, i'll get a good heat skins fan ( xp-120) and then i'll crank her up!

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    Banned Smokey21's Avatar
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    I for one, think memtest is useless. It found 15,000 errors on 1 pass of TCCD i tryed 2hand,, yet the memory was stable.

    Id use 32mb Super PI as a stabilty first, and once you get errors in that, play around with voltages and stuff, and then try Prime95. If prime fails after 6 mins, it's definatly not stable.

  8. #8
    MacDaddy! darrensen's Avatar
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    will i need to play with the voltages on the RAM?

  9. #9
    Now with added sobriety Rave's Avatar
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    Quote Originally Posted by Smokey21
    I for one, think memtest is useless. It found 15,000 errors on 1 pass of TCCD i tryed 2hand,, yet the memory was stable.
    No it wasn't. Memtest errors = unstable memory subsystem. It may have been stable enough for you, but that doesn't mean it's stable.

    Now that's fine, but don't make the mistake of thinking that just because a program isn't any use to you, it isn't any use to anyone.

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    Senior Member SilentDeath's Avatar
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    Quote Originally Posted by Smokey21
    I for one, think memtest is useless. It found 15,000 errors on 1 pass of TCCD i tryed 2hand,, yet the memory was stable.

    Id use 32mb Super PI as a stabilty first, and once you get errors in that, play around with voltages and stuff, and then try Prime95. If prime fails after 6 mins, it's definatly not stable.

    15,000 errors do not happen for no reson.

    The main issue with your idea of superpi is that you would have to boot windows first, which could easly get corrupted if its not stable. Not really a good idea unless you already know your memory is stable and in that case whats the point?

    I only use test5, as the lower number tests dont usually find anything and the higher numbers take far too long to compleat although probably more effective.
    I useually do 2-3 passes of test5 which should rule out overheating, which one pass will miss.

  11. #11
    MacDaddy! darrensen's Avatar
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    how do you select it just to do test 5?

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    Now with added sobriety Rave's Avatar
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    See the first line of SilentDeath's first post.

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    MacDaddy! darrensen's Avatar
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    Quote Originally Posted by Rave
    See the first line of SilentDeath's first post.

    sorry about that......you can tell its friday!! again!

  14. #14
    MacDaddy! darrensen's Avatar
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    Good news so far.....

    past memtest 86 16 times with no errors!!
    past superpi up for 16mb (not had time to do rest) i'll run rest later.

    Will try prime95 tonnight.

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    Banned Smokey21's Avatar
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    memtest means dick all.

    Y bother with it. Just use prime95, it stresses it a lot more.

  16. #16
    Ah, Mrs. Peel! mike_w's Avatar
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    Quote Originally Posted by Smokey21
    memtest means dick all.
    I've used Memtest on a number occasions to identify memory problems. It is the first thing I try when a PC becomes unstable - each time Memtest has found errors, replacing the RAM has solved the problem for me. Therefore, I would say that Memtest is very useful, and means slightly more than dick all.
    "Well, there was your Uncle Tiberius who died wrapped in cabbage leaves but we assumed that was a freak accident."

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