The information on the manufacturer of the module the Manufacturer of the module: PDP Systems, Inc. The manufacturer of microcircuits of the module: the Site of the manufacturer of the module is unknown: The management on decoding Part Number of modules of memory DDR on a site of the manufacturer is absent. On web-sayta the manufacturer, devoted to the given modules, it is underlined, that the product represents the complete set from two modules in volume 512MB everyone, calculated on functioning in mode DDR2-10 at taymingah 5-5-5- and a feeding pressure up to 2. Century Given microcircuits SPD of the module the Description of general standard notebook gps reviews SPD: JEDEC Standard No. 21-C, 4.1. - SERIAL PRESENCE DETECT STANDARD, General Standard the Description of specific standard SPD for DDR2: JEDEC Standard No. 21-C, 4.1.2. - Appendix X: Specific SPDs for DDR SDRAM (Revision 1.2) Parameter of Byte Value Decoding Fundamental type of memory 08h DDR SDRAM Total of address lines of a line of the module 0Eh (RA0-RA13) Total of address lines of a column of the module 0Ah (CA0-CA9) Total of physical banks of the module of memory 60h physical bank the External trunk of data of the module of memory 40h bats the Level of a feeding pressure 05h SSTL 1.8V the Minimal duration of the period sinhrosignala (t CK) at the maximal delay CAS# (CL notebook gps reviews X) 20h 2. nanoseconds (500. MHz) Type of a configuration of the module 00h Non-ECC Type and a way of regeneration of data 82h 7.81 ms 0.5x the reduced self-regeneration Width of the external interface of the trunk of data (type of the organization) used microcircuits of memory 08h x Width of the external interface of the trunk of data (type of the organization) used microcircuits of memory ECC-modulya 00h are not certain Duration of transferred packages (BL) 0Ch BL = 4, Quantity of logic banks of each microcircuit in the module 04h delays Supported to duration CAS# (CL) 30h CL = 5, Minimal duration of the period sinhrosignala (t CK) at the reduced delay CAS# (CL X-1) 25h 2. nanoseconds (400. MHz) the Minimal duration of the period sinhrosignala (t CK) at notebook gps reviews the reduced delay CAS# (CL X-2) 00h is not certain Minimal time of additional charge of data in line (t RP) 28h 10. nanoseconds 5.0, CL = 4.0, CL = Minimal delay between activization of the next lines (t RRD) 1Eh 7. nanoseconds 3.75, CL = 3.0, CL = Minimal delay between RAS# and CAS# (t RCD) 28h 10. nanoseconds 5.0, CL = 4.0, CL = Minimal duration of an impulse of a signal RAS# (t RAS) 1Eh 30. nanoseconds 15.0, CL = 12.0, CL = Capacity of one physical bank of the module of memory 80h 5 MB the Period of restoration after record (t WR) 3Ch 15. nanoseconds 7.5, CL = 6.0, notebook gps reviews CL = Internal delay between commands WRITE and READ (t WTR) 1Eh 7. nanoseconds 3.75, CL = 3.0, CL = Internal delay between commands READ and PRECHARGE (t RTP) 1Eh 7. nanoseconds 3.75, CL = 3.0, CL = Minimal time of a cycle of a line (t RC) 41, 37h, 00h 55. nanoseconds 27.5, CL = 22.0, CL = Period between commands of self-regeneration (t RFC) 42, 4Bh, 00h 75. nanoseconds 37.5, CL = 30.0, CL = Maximal duration of the period sinhrosignala (t CK max) 80h 8. nanoseconds Number of audit SPD 00h are not certain the Control sum of byte 0- h (Truly identification code of software producer JEDEC 64- 7Fh, 7Fh, 7Fh, 7Fh 7Fh, notebook gps reviews 02h PDP Systems Part Number the module 73- are not certain Date of manufacturing of the module h, 00h are not certain Serial number of the module h, 00h, 00h, 00h are not certain Despite of a non-standard of mode DDR2-1000, contents SPD of considered modules it is programmed in good conformity with standard JEDEC. The maximal high-speed mode on which modules are calculated, corresponds declared DDR2-10 since it is characterized by time of a cycle of 2. nanoseconds (frequency of 5 MHz). To this mode there corresponds first of supported values t CL = 5, and the full scheme taymingov enters the name in the form of 5-5-5-15, that also corresponds to the declared characteristics of modules. To the notebook gps reviews reduced value of a delay of a signal CAS# (CL X- = 4) there corresponds the period sinhrosignala 2. nanoseconds, i.e. frequency of 4 MHz (standard mode DDR2-800). The full scheme taymingov in this case enters the name as 4-4-4- that it is possible to consider as a successful combination of absolute values of delays and the periods sinhrosignala, not supposing nonintegral final values taymingov. From the standard it is possible to consider as a small deviation incorrect (absent) number of audit SPD (00h) and absence of data about Part Number, serial number and date of manufacturing of modules while the identification code of the manufacturer is specified truly. Configuration of the test stand the Processor: Intel Pentium Extreme Edition 3. GHz (Prescott N0, MB L2 Parent payment: ASUS P5WD2-E Premium, version BIOS 02 from 0 Unlike two previous notebook gps reviews researches of high-speed modules DDR in which the new version of test package RMMA 3. was used, in the present research (executed earlier in vremenn about m the attitude) previous version 3. with old parameters podtestov, a little overestimating results of measurement of throughput of memory owing to rather great volume L2-ke`sha ( MB) in the ratio with the size of the tested block of memory ( MB) was applied. In the first series of tests the scheme taymingov, exposed in adjustments BIOS by default (Memory Timings was used: by SPD). Testing of the given modules, naturally, was planned in two high-speed modes as standard notebook gps reviews DDR2-8 (at frequency FSB of 2 and 2 MHz), and in non-standard DDR2-10 (frequency FSB of 2 MHz), however in the latter case, even at use of the slowest scheme taymingov 5-6-6- and a feeding pressure 2. In, in the test of stability of memory were quickly found out mistakes. It is sad, but the fact: considered modules have not pulled declared mode DDR2-1000. At least on given parent payment ASUS P5WD2-E Premium with given version BIOS (0206). For standard mode DDR2-8 BIOS of a parent payment as values taymingov has by default exposed the scheme 5-5-5-12, that, generally speaking, a little bit notebook gps reviews strange, considering presence of data about this mode in microcircuit SPD (taymingi 4-4-4-12). Parameter / Mode DDR2-8 Frequency FSB, MHz 2 2 Taymingi 5-5-5- 5-5-5- Average PSP on reading, MB/s 56 68 Average PSP on record, MB/s 23 25 Maks. PSP on reading, MB/s 66 87 Maks. PSP on record, MB/s 42 56 Minimal latentnost' pseudo-casual access, nanosecond 52. 45. Maximal latentnost' pseudo-casual access, nanosecond 61. 52. Minimal latentnost' casual access *, nanosecond 103. 93. Maximal latentnost' casual access *, nanosecond 126. 113. Minimal latentnost' pseudo-casual access, nanosecond (without hardware presample) 80. 70. Maximal latentnost' pseudo-casual access, nanosecond (without hardware presample) 106. 90. Minimal latentnost' casual access *, nanosecond (without hardware presample) 103. 94. Maximal latentnost' casual access *, nanosecond (without hardware presample) 131. 114.4 High-speed parameters of modules in mode DDR2-8 look is comprehensible on parameters PSP and modules do not concede delays to the analogues from other manufacturers notebook gps reviews (for example,). As it is usual, use of higher frequency of the system trunk (2 MHz) leads to appreciable reduction of delays. Values taymingov, except for t CL, varied on the move owing to the opportunity of dynamic change of adjustments of a subsystem of memory supported by a chipset built in test package RMMA. Stability of functioning of a subsystem of memory was defined by means of the auxiliary utility RightMark Memory Stability Test which is a part of test package RMMA. Parameter / Mode DDR2-8 Frequency FSB, MHz 2 2 Taymingi 4-3- (2. V) 4-3- (2. V) Average PSP on reading, MB/s 56 69 Average PSP on record, MB/s 24 25 Maks. PSP on reading, MB/s 65 85 Maks. PSP on record, MB/s 42 56 Minimal latentnost' pseudo-casual access, nanosecond 49. 44. Maximal latentnost' notebook gps reviews pseudo-casual access, nanosecond 58. 52. Minimal latentnost' casual access *, nanosecond 101. 92. Maximal latentnost' casual access *, nanosecond 125. 112. Minimal latentnost' pseudo-casual access, nanosecond (without hardware presample) 75. 68. Maximal latentnost' pseudo-casual access, nanosecond (without hardware presample) 102. 88. Minimal latentnost' casual access *, nanosecond (without hardware presample) 101. 92. Maximal latentnost' casual access *, nanosecond (without hardware presample) 127. 113.4 The minimal values taymingov which we managed to reach in mode DDR2-8 at use of a feeding pressure 2. In, look vpechatlyayusch'e as do not concede to the absolute record put by modules 4-3- (as it is usual, last parameter t RAS does not participate in razgonnoy to the scheme since change of its value is ignored). Considering this circumstance, the fact nerabotosposobnosti considered modules in more high-speed mode DDR2-10 at nominal (and even slower) taymingah notebook gps reviews looks strange enough. Tested modules Patriot DDR2-10 have proved as the high-speed modules capable steadily to function only in official mode DDR2-8 at least, with parent payment ASUS P5WD2-E Premium participating in tests (ability of functioning modules in informal modes, intermediate between DDR2-8 and DDR2-1000, it was not checked). In this mode modules possess good high-speed parameters and magnificent dispersal on taymingam they are capable to function at taymingah 4-3- (a pressure of a feed 2.2), than expose itself on a level of modules to which till now posessed an absolute record in the given category. In the Moscow retail: Modules of memory Patriot DDR2-10 2x512MB N/D (3) It is published on June, 23rd, 20 Other discussions in conference: [the day before yesterday, ] [8/31/2007, ] [8/30/2007, ] [8/29/2007, ] notebook gps reviews [8/27/2007, ] Comments? Amendments? Additions?

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