Prime95 - failed!

FATAL ERROR: Rounding was 0.5, expected less than 0.4

Well as some of you may have read, about my problems getting my C2D system up and running. I took the advice of board members and continued to do so by running Prime95.

Sadly, the second core failed the torture test after a pitiful 34 minutes. I'm now stressing the memory on one core and the second core without the memory on the second core. Another small point is, it says UNKNOWN for the L2 cache size? Hmm.

Is my new system doomed? Will these imporant bits be finding themselves going back to the supplier? Will they accept that "it failed Prime95 therefore its faulty?".

What do I do now? :?

*sighs* It failed after 9 minutes on the first core, which was testing the memory, with a blend test. This does not sound good!
31 answers Last reply
More about prime95 failed
  1. Might wanna tell everyone what memory you brought.

    And some CPU-Z validations to see what your system is set at.

    Not sure if you have it, but found:

    CPU-Z website

    Edit: if you click on my signature where the P4 is, that will give you an idea on how people see system at their settings.
  2. It was Corsair 2GB DDR2 Value Select PC5300 Dual Channel Kit (2x1GB) (VS2GBKIT667D2). Will get those CPU Z validations next. Thanks again Grimmy.
  3. CPU-Z Report
    CPU-Z version 1.35.

    CPU(s)
    Number of CPUs 2
    CPU#1 APIC ID = 0
    Name Intel Core 2 Duo E6600
    Code Name Conroe
    Specification Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
    Family / Model / Stepping 6 F 6
    Extended Family / Model 6 F
    Package LGA 775
    Core Stepping B2
    Technology 65 nm
    Supported Instructions Sets MMX, SSE, SSE2, SSE3, SSE4, EM64T
    CPU Clock Speed 2400.1 MHz
    Clock multiplier x 9.0
    Front Side Bus Frequency 266.7 MHz
    Bus Speed 1066.7 MHz
    L1 Data Cache 32 KBytes, 8-way set associative, 64 Bytes line size
    L1 Instruction Cache 32 KBytes, 8-way set associative, 64 Bytes line size
    L2 Cache 4096 KBytes, 16-way set associative, 64 Bytes line size
    L2 Speed 2400.1 MHz (Full)
    L2 Location On Chip
    L2 Data Prefetch Logic yes
    L2 Bus Width 256 bits
    CPU#2 APIC ID = 1
    Name Intel Core 2 Duo E6600
    Code Name Conroe
    Specification Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
    Family / Model / Stepping 6 F 6
    Extended Family / Model 6 F
    Package LGA 775
    Core Stepping B2
    Technology 65 nm
    Supported Instructions Sets MMX, SSE, SSE2, SSE3, SSE4, EM64T
    CPU Clock Speed 2400.1 MHz
    Clock multiplier x 9.0
    Front Side Bus Frequency 266.7 MHz
    Bus Speed 1066.7 MHz
    L1 Data Cache 32 KBytes, 8-way set associative, 64 Bytes line size
    L1 Instruction Cache 32 KBytes, 8-way set associative, 64 Bytes line size
    L2 Cache 4096 KBytes, 16-way set associative, 64 Bytes line size
    L2 Speed 2400.1 MHz (Full)
    L2 Location On Chip
    L2 Data Prefetch Logic yes
    L2 Bus Width 256 bits

    Mainboard and chipset
    Motherboard manufacturer Gigabyte Technology Co., Ltd.
    Motherboard model 965P-DQ6,
    BIOS vendor Award Software International, Inc.
    BIOS revision F2
    BIOS release date 06/29/2006
    Chipset Intel P965/G965 rev. C1
    Southbridge Intel 82801HB (ICH8) rev. 02
    Sensor chip ITE 8718
    Graphic Interface PCI-Express
    PCI-E Link Width x16
    PCI-E Max Link Width x16

    Memory
    DRAM Type DDR2-SDRAM
    DRAM Size 2048 MBytes
    DRAM Frequency 333.3 MHz
    FSB:DRAM 4:5
    CAS# Latency 5.0 clocks
    RAS# to CAS# 5 clocks
    RAS# Precharge 5 clocks
    Cycle Time (TRAS) 15 clocks
    # of memory modules 2
    Module 0 Corsair DDR2 PC5300 - 1024 MBytes
    Module 1 Corsair DDR2 PC5300 - 1024 MBytes

    Software
    Windows version Microsoft Windows XP Home Edition Service Pack 2 (Build 2600)
    DirectX version 9.0c

    *****

    Anything else I can post? Hope this helps. Oh yeah, just noticed it is NOT operating at advertise timings, wonder why.
  4. What timings should it be operating at?
  5. Advertised timings are CL3. Either way, Prime95 has been running for longe than the previous tests lasted, on just 8k FFT lengths. I'm going to see if it gets to an hour. Then have my eye on windows memory tester.
  6. Doh.. putting tables up from the manal kinda makes this hard to demonstrate what I'm thinking:

    Quote:
    The following is a Dual Channel Memory configuration table:
    (DS: Double Side, SS: Single Side, "--": Empty)
    2 memory modules
    4 memory modules
    DDR II 1 DDR II 2 DDR II 3 DDR II 4
    DS/SS - - DS/SS - -
    - - DS/SS - - DS/SS
    DS/SS DS/SS DS/SS DS/SS


    Anyhoo... Perhaps you need the DDRII memory in banks 1 and 3 for dual channel.

    I think you have banks 1 and 2 populated.

    Quote:
    Module 0 Corsair DDR2 PC5300 - 1024 MBytes
    Module 1 Corsair DDR2 PC5300 - 1024 MBytes


    So it should read, module 0 and module 2?
  7. The case is open right now, the manual said to use the same colours for dual channel. So both memory modules are in the yellow slots. Also, it claims to be in dual channel mode when it posts. I shall check my manual to tripple check then brb! (although, if that information says its in the wrong place, hmm).

    I did a create html report and banged it in? Was I sposed to do something else? :oops: Sorry!

    Edit: I can see the problem, coping that table may not have been such a good idea. If I had access to my ftp right now, I'd upload some screenies, but, only minimal software on here. CPU-Z says slot 1 and 3 are occupied.

    Second edit: *laughs* Im an idiot. Yes, I see what you mean. And yes, the memory modules are populated correctly and yes I understood what you meant :)

    Nearly an hour gone, perhaps time to test the memory directly.
  8. I find it very unlikely that Corsair's ValueSelect DDR2 RAM has CAS 3 latency. I'm guessing that the 5-5-5-15 timings listed are correct.

    Corsair's website doesn't list the info but Anandtech lists it as 4-4-4-12 with the model number you listed.
  9. That was off the PDF manual of your board - ga-965p-dq6.

    If you look at the motherboard layout, you will see in that picture:

    Slot one is the nearest to the cpu, the farthest is 4.

    So from what I saw, the 1st and 3rd banks should be populated, if I'm reading that correctly.

    Edit: lol lots of editing time. :D . o O (just wanna be sure)
  10. If thats the case Anoobis, they can have it back, because I REALLY wanted fast, low latency ram at a decent price. If I had of known it wasn't as advertised, I would have paid more for better RAM. It just seemed like a great deal. Those buggers!
  11. That's right Grimmy, and, thats how its populated now. For once I don't think the error is my fault? Or is there more ways to test for user error hehe.
  12. Did you test one stick and then the other yet?

    You might just have one bad stick.
  13. See my edited post.

    C2D isn't affected by slower timings as adversely as AMD CPUs. But if you wanted high-performance memory than that is not what you got. I'm sure it's still sufficient though.
  14. Quote:
    Did you test one stick and then the other yet?

    You might just have one bad stick.


    That could be a possiblity.

    Or that value ram may not like to play nice in dual channel.

    I remember the days when memory wasn't so... picky :?
  15. Quote:
    Did you test one stick and then the other yet?

    You might just have one bad stick.


    Windows memory diagnostic came back negative for faults. Is this conclusive? I only ran standard tests.

    I know Anoobis, but I didn't want to spend over £1000 on a pc then save on £40 only for reduced performace, or in this case, errors. Will continue testing. Please keep the ideas comming. I want as much info as possible come tomorow for sending back whatever needs to be sent back, if in fact, anything does!
  16. Try running 1 stick to see if Prime95 will run correcty?

    I usually will run it over 6 hours for testing, but it is allot of time.

    If it runs without errors on 4 hours, then try the other stick.

    I really can't say what to recommend at this point.
  17. Hmm, fair enough, although, i think to be perfectly honest I'm just going to play a game for the rest of evening and to hell with it lol. The website lied with the memory timings, I think I may just make them pay big time tomorow, threaten to them with the old credit card company unless they sort it out. Not that I have enough time to sort this out, going on holiday tomorow afternoon. *shrugs*
  18. I just read thru quickly, i assume you havent started overclocking yet? Also check your ram out and find out what the exact timing ant voltages are supposed to be, then go into your bios and set them manualy, they are probably on auto detect. Dont worry about it sgowing up as cas3, i believe thats a board bug, the ds3's do that too. So first off..

    Go to bios set timings and voltage for YOUR ram
    If it still bombs pull 1 stick test it for 3-4 hours (altho it will usualy fail within 1hr)
    Then switch the mem sticks and do it again.
  19. Quote:
    Windows memory diagnostic

    Hmm, I'm not sure what that one is?

    Might wanna try Memtest86 instead. It's pretty easy to use.

    Good point about entering the memory voltage/timing manually but he may have to contact Corsair directly to get the information as it isn't listed on their site. The Anandtech link I posted could probably be trusted though.
  20. if he got it off newegg its probably in the description/specs?
  21. I've not had the best of luck getting that corsair value ram to work reliably in certain boards. It's not defective, it just doesn't work in some boards, so just keep in mind that it may just be a hardware compatability problem.
  22. I checked them too. It's not listed there either. Kinda strange.
  23. VS2GBKIT667D2 is the product number for that product
    2x1gb 240 pin value-select ddr2 5300.

    I've checked 10 sites so far with no posted latency timings.
    I didn't see them on the corsair site I got the product number from either.

    Very safe to assume they're 5-5-5-15.
    Where did you order them from.
    I'd check more sites but right now I can't access google/anywhere..
    Yay for net at work.
    I think all machines are being scanned for security compliancy so massive network slowdown.

    UPDATE
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2341730&CatId=2261
    is a good deal if your able to return these.
    I'm guessing you got the timings confused with this ram.
    Memory Size 2 x 1024MB

    Memory Speed 667MHz PC5400
    Memory CAS Latency 4-4-4-12
  24. :P
    Quote:
    FATAL ERROR: Rounding was 0.5, expected less than 0.4

    Well as some of you may have read, about my problems getting my C2D system up and running. I took the advice of board members and continued to do so by running Prime95.

    Sadly, the second core failed the torture test after a pitiful 34 minutes.


    Well, Intel had to go back in time to base core on the older Pentium M core, maybe they re-introduced the Pentium Math Bug
    :P :tongue: :lol: :P
  25. if you keep getting that same error,try loosening the timings,it was happening to me so i changed some of the numbers and now my rig is stable
  26. I got the memory from here . I will try to play with it a bit tomorow. The good thing is the memory is lifetime warranty and the CPU is 3 year warranty. So I suppose I have a long while to sort this out if I can.

    I can't tell you how much I appreciate the help, I'll try playing with the ram tomorow. And, please, stop saying he lol :P

    *thinks of adding the line, "Yes, I'm a girl" to her sig*
  27. Interesting, OverclockersUK lists all of Value RAMS at CAS 3. This is wrong I believe. CAS 3 DDR2 is expensive and not usually offered on value series RAM regardless of the manufacurer.

    I found them all on Newegg but they only listed the CAS on VS1GBKIT533D2. They listed it as CAS 4.
  28. I pretty much agree. That has to be a typo from Overclockers UK.
  29. An update to the situation.

    Anandtech gave some examples of stable memory timings and voltalges, of course, attempting to try these out just made everything worse! Short on cache Prime95 on one core, fine. Large calculations taking up lots of memory, lasted 4 minutes!!!

    The memory is on it's way back home with a flee in it's ear. A complete refund is offered. Now to order some XMS2 like I should have done in the first place. Let's hope OC UK correct that error as they now know it's there.

    I'll be going for the Corsair 2GB DDR2 XMS2-6400C4 TwinX with CL4, apparantly. Although, it's only tested by Gigabyte to run in SS. Useless!
  30. I don't know if you've bought yet, but G. Skill makes excellent RAM. OverclockersUK has the model #F2-6400PHU2-2GBHZ on their site for less money than the Corsair you listed. I'm willing to bet the G. Skill stuff is just as good as Corsair's. Just pay attention to G.Skill's Specs on timings and voltage. You may have to enter them manually.

    It worked for Coolaler.
  31. Heh.. I just hope you have the bios settings right for memory timings.

    It should run properly with everything set to auto, but then C2D just came out so there might be some things yet to be matured (bios, drivers). Or fluctuation in voltage when under stress.

    Really would hate to see the same problem happen when you get your newer ram.
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