MEMORY BUS SPEED TEST RESULTS See BUSSPEED.TXT for a description of the tests and results. 1. FROM W32BUSRD.BAT, DOSBUSRD.BAT and OS2BUSRD.CMD BUSSPEED Standard Parameters Loading 4 bytes with 32 byte increments using MOV At 4 bytes/xfer At 32 b/xfer 16 486 L1 L2 RAM L1 L2 RAM L2 RAM Vers CPU MHz MIPS MIPS MIPS MB/S MB/S MB/S MB/S MB/S DOS 80486DX2 66 29.3 2.8 2.0 117 11 8 45 32 DOS Pentium 100 90.7 6.6 3.1 363 26 12 211 99 OS2 Pent MMX 200 188.2 13.3 7.2 753 53 29 426 230 W95 Pent MMX 200 186.4 13.1 7.2 746 52 29 419 230 DOS Pent MMX 200 188.2 13.3 7.3 753 53 29 426 234 DOS Pent Pro 200 191.4 33.4 8.2 766 134 33 1069 262 NT Pent Pro 200 191.1 33.3 8.1 764 133 32 1066 259 BUSSPEED Loading, Increment 4, 1 Register Loading every 4 byte word using MOV At 4 bytes/xfer L1 L2 RAM L1 L2 RAM Vers CPU MHz MIPS MIPS MIPS MB/S MB/S MB/S DOS 80486DX2 66 35.1 8.2 6.4 140 33 26 DOS Pentium 100 97.2 31.1 18.7 389 124 75 OS2 Pent MMX 200 194.7 58.6 35.0 779 234 140 W95 Pent MMX 200 192.4 58.6 34.7 770 234 139 DOS Pent MMX 200 196.3 59.2 35.4 785 237 142 DOS Pent Pro 200 194.7 114.0 57.5 779 456 230 NT Pent Pro 200 196.2 113.5 58.2 785 454 233 BUSSPEED Loading, Increment 4, 2 Registers Loading every 4 byte word using MOV At 4 bytes/xfer L1 L2 RAM L1 L2 RAM Vers CPU MHz MIPS MIPS MIPS MB/S MB/S MB/S DOS 80486DX2 66 34.7 8.0 6.3 139 32 25 DOS Pentium 100 180.3 34.7 20.1 721 139 80 OS2 Pent MMX 200 368.9 59.0 35.2 1476 236 141 W95 Pent MMX 200 365.7 58.9 34.7 1463 236 139 DOS Pent MMX 200 369.9 59.2 35.4 1480 237 142 DOS Pent Pro 200 193.9 113.9 56.7 776 456 227 NT Pent Pro 200 194.5 113.8 58.2 778 455 233 BUSSPEED Check Data 1, Increments 4, 1 Register Loading every 4 byte word using AND and XOR At 4 bytes/xfer L1 L2 RAM L1 L2 RAM Vers CPU MHz MIPS MIPS MIPS MB/S MB/S MB/S DOS 80486DX2 66 31.7 7.7 6.1 127 31 24 DOS Pentium 100 49.6 24.1 16.1 198 96 64 OS2 Pent MMX 200 98.9 48.5 31.2 396 194 125 W95 Pent MMX 200 97.3 44.5 30.8 389 178 123 DOS Pent MMX 200 98.2 48.0 31.4 393 192 126 DOS Pent Pro 200 188.1 113.6 61.1 752 454 244 NT Pent Pro 200 189.4 114.1 60.7 758 456 243 BUSSPEED Check Data 1, Increment 4, 2 Registers Loading every 4 byte word using AND and XOR At 4 bytes/xfer L1 L2 RAM L1 L2 RAM Vers CPU MHz MIPS MIPS MIPS MB/S MB/S MB/S DOS 80486DX2 66 30.0 7.7 6.1 120 31 24 DOS Pentium 100 94.9 29.3 18.4 380 117 74 OS2 Pent MMX 200 190.2 59.0 35.2 761 236 141 W95 Pent MMX 200 190.3 58.7 34.7 761 235 139 DOS Pent MMX 200 190.3 57.9 35.2 761 232 141 DOS Pent Pro 200 190.3 113.8 61.8 761 455 247 NT Pent Pro 200 190.0 113.8 60.5 760 455 242 BUSSPEED Check Data 2, Increment 4, 1 Register Loading every 4 byte word using AND At 4 bytes/xfer L1 L2 RAM L1 L2 RAM Vers CPU MHz MIPS MIPS MIPS MB/S MB/S MB/S DOS 80486DX2 66 31.3 7.8 6.1 125 31 24 DOS Pentium 100 49.1 24.0 16.3 196 96 65 OS2 Pent MMX 200 98.9 48.5 31.0 396 194 124 W95 Pent MMX 200 97.3 45.0 30.7 389 180 123 DOS Pent MMX 200 98.3 48.2 31.2 393 193 125 DOS Pent Pro 200 190.3 113.1 61.1 761 452 244 NT Pent Pro 200 190.0 114.2 60.7 760 457 243 BUSSPEED Check Data 2, Increment 4, 2 Registers Loading every 4 byte word using AND At 4 bytes/xfer L1 L2 RAM L1 L2 RAM Vers CPU MHz MIPS MIPS MIPS MB/S MB/S MB/S DOS 80486DX2 66 30.3 7.7 6.2 121 31 25 DOS Pentium 100 95.0 29.6 18.5 380 118 74 OS2 Pent MMX 200 191.3 58.9 35.2 765 236 141 W95 Pent MMX 200 190.0 58.4 34.7 760 234 139 DOS Pent MMX 200 190.5 58.5 35.2 762 234 141 DOS Pent Pro 200 193.0 112.8 61.1 772 451 244 NT Pent Pro 200 192.6 113.7 60.7 770 455 243 2. FROM DOSBAT2.BAT 32 byte address increments, offset 0 to 32 DOS Version Data Address 0055cd20 PPRO MMX Pentium 486DX2 200 MHz 200MHz 100MHz 66 MHz EDO SDRAM FPM KB Offset MIPS MIPS MIPS MIPS 4 0 193.4 189.5 90.5 30.1 4 1 191.0 49.1 24.2 11.4 4 2 195.3 49.5 24.2 11.4 4 3 191.0 48.8 24.2 11.4 4 4 193.0 189.5 91.0 30.5 4 5 39.5 49.1 24.3 11.5 4 6 39.5 49.5 24.3 11.3 4 7 39.5 48.8 24.3 11.3 4 8 193.4 188.2 90.4 30.1 4 9 192.0 49.6 24.3 11.4 4 10 190.3 49.5 24.3 11.3 4 11 192.8 49.2 24.2 11.5 4 12 191.0 189.5 90.7 30.4 4 13 39.5 48.9 24.2 11.4 4 14 39.5 49.1 24.3 11.5 4 15 39.5 48.9 24.5 11.3 4 16 191.0 189.1 91.5 30.1 4 17 193.0 49.2 24.2 11.3 4 18 191.0 49.2 24.3 11.5 4 19 193.0 49.1 24.3 11.3 4 20 191.0 187.7 91.7 30.5 4 21 39.5 49.2 24.5 11.3 4 22 39.5 49.5 24.0 11.4 4 23 39.5 49.5 24.3 11.3 4 24 191.0 188.2 91.2 30.4 4 25 193.4 49.6 24.3 11.3 4 26 191.4 49.5 24.3 11.3 4 27 193.4 48.9 24.5 11.3 4 28 192.8 189.1 90.9 30.5 4 29 21.9 49.7 24.2 11.3 4 30 22.2 49.5 24.3 11.3 4 31 22.0 48.9 24.2 11.3 64 0 33.2 13.3 6.6 2.7 64 1 33.5 11.0 4.7 2.0 64 2 33.0 11.0 4.7 2.0 64 3 33.0 11.0 4.7 2.0 64 4 33.0 13.2 6.6 2.7 64 5 20.7 11.1 4.7 2.0 64 6 20.8 11.1 4.7 2.0 64 7 20.9 11.1 4.7 2.0 64 8 32.9 13.3 6.6 2.8 64 9 33.1 11.0 4.7 2.0 64 10 33.1 11.0 4.7 2.0 64 11 33.2 11.0 4.7 2.0 64 12 32.9 13.2 6.6 2.8 64 13 19.5 7.3 4.7 1.4 64 14 19.4 7.4 4.7 1.4 64 15 19.4 7.3 4.7 1.4 64 16 33.2 13.3 6.6 2.8 64 17 33.3 11.0 4.7 2.0 64 18 33.3 11.0 4.7 2.0 64 19 33.0 11.0 4.7 2.0 64 20 33.0 13.3 6.6 2.8 64 21 20.9 11.0 4.7 2.0 64 22 20.8 11.1 4.7 2.0 64 23 21.0 11.0 4.7 2.0 64 24 33.5 13.3 6.6 2.8 64 25 33.4 11.0 4.7 2.0 64 26 33.5 11.0 4.7 2.0 64 27 33.0 11.0 4.7 2.0 64 28 33.0 13.2 6.6 2.8 64 29 15.7 13.1 6.6 1.4 64 30 15.6 13.1 6.5 1.4 64 31 15.7 13.1 6.6 1.4 2048 0 8.1 7.2 3.1 2.0 2048 1 8.1 6.6 2.6 1.6 2048 2 8.2 6.5 2.6 1.6 2048 3 8.2 6.6 2.6 1.6 2048 4 8.2 7.3 3.1 2.0 2048 5 5.6 6.5 2.6 1.6 2048 6 5.6 6.5 2.6 1.6 2048 7 5.7 6.5 2.6 1.6 2048 8 8.2 7.3 3.1 2.0 2048 9 8.2 6.6 2.6 1.6 2048 10 8.2 6.5 2.6 1.6 2048 11 8.2 6.6 2.6 1.6 2048 12 8.2 7.3 3.1 2.0 2048 13 4.9 4.4 2.6 1.0 2048 14 4.9 4.4 2.6 1.0 2048 15 4.9 4.4 2.6 1.0 2048 16 8.1 7.3 3.1 2.0 2048 17 8.2 6.6 2.6 1.6 2048 18 8.2 6.6 2.6 1.6 2048 19 8.2 6.5 2.6 1.6 2048 20 8.1 7.3 3.1 2.0 2048 21 5.7 6.6 2.6 1.6 2048 22 5.6 6.6 2.6 1.6 2048 23 5.6 6.5 2.6 1.6 2048 24 8.2 7.2 3.1 2.0 2048 25 8.2 6.6 2.6 1.6 2048 26 8.2 6.5 2.6 1.6 2048 27 8.2 6.5 2.6 1.6 2048 28 8.1 7.3 3.1 2.0 2048 29 4.4 7.3 3.1 1.0 2048 30 4.4 7.3 3.1 1.0 2048 31 4.5 7.3 3.1 1.0 3. FROM DOSBAT3.BAT AND DOSBAT4.BAT 1 Register 2 Registers CPU PPRO MMX Pent 486DX2 PPRO MMX Pent 486DX2 MHz 200 200 100 66 200 200 100 66 EDO SDRAM FPM EDO SDRAM FPM KB Offse MIPS MIPS MIPS MIPS MIPS MIPS MIPS MIPS 4 0 196.3 196.3 98.1 35.0 193.9 370.2 179.9 34.7 4 1 65.8 49.6 24.8 11.8 65.6 65.8 32.8 11.8 4 2 65.6 49.4 24.9 11.8 65.6 65.6 33.0 11.8 4 3 65.8 49.6 24.7 11.8 66.4 66.3 32.7 11.8 4 4 194.7 194.7 97.0 35.0 194.7 370.2 179.1 34.7 4 5 65.6 49.6 24.8 11.8 65.6 65.6 33.1 11.8 4 6 65.6 49.6 24.9 11.8 66.1 65.6 32.7 11.8 4 7 65.6 49.2 24.8 11.8 65.6 65.6 32.7 11.8 4 8 196.6 194.7 97.3 35.0 193.9 370.2 180.9 34.7 4 9 65.6 49.6 24.7 11.8 65.6 65.6 32.8 11.8 4 10 65.6 49.6 24.9 11.8 65.6 65.6 33.0 11.8 4 11 65.8 49.6 24.9 11.8 65.6 65.8 32.7 11.8 4 12 198.3 194.7 97.0 34.7 194.2 369.4 179.9 34.7 4 13 65.6 49.5 24.7 11.8 65.6 65.6 33.1 11.8 4 14 65.6 49.6 24.8 11.8 65.4 65.8 33.0 11.8 4 15 65.6 49.2 24.7 11.8 65.0 65.4 32.7 11.9 4 16 196.6 194.7 97.2 35.1 194.3 370.2 178.1 34.7 64 0 113.9 59.1 31.1 8.2 113.8 60.1 34.7 8.0 64 1 64.1 33.2 17.0 6.1 64.3 38.1 20.4 6.0 64 2 64.3 33.2 17.1 6.1 64.3 37.9 20.4 6.0 64 3 64.3 33.2 17.1 6.1 64.3 37.7 20.4 6.0 64 4 113.9 59.2 31.4 8.4 114.3 65.4 35.4 7.9 64 5 64.3 33.1 17.1 5.7 63.7 38.1 19.4 5.8 64 6 64.1 33.1 17.1 5.7 63.7 37.7 19.6 5.8 64 7 64.0 33.2 17.1 5.7 64.1 37.9 19.6 5.8 64 8 113.9 59.0 31.4 7.8 113.8 59.1 34.7 8.0 64 9 64.9 33.2 17.2 6.1 64.3 37.7 20.2 6.0 64 10 64.9 33.2 17.1 6.1 64.2 37.9 20.4 6.0 64 11 64.9 33.6 17.0 6.1 64.9 38.1 20.2 6.0 64 12 114.2 59.1 31.4 8.0 114.0 65.7 35.0 7.9 64 13 64.1 33.2 17.1 5.8 63.5 38.1 19.6 5.8 64 14 64.3 33.2 17.1 5.8 64.0 37.9 19.6 5.8 64 15 63.7 33.2 17.1 5.8 63.7 38.1 19.6 5.8 64 16 113.8 59.2 31.4 8.1 114.2 59.0 35.1 8.0 2048 0 56.8 35.2 18.7 6.4 56.8 35.3 20.1 6.2 2048 1 47.7 24.1 12.5 4.9 47.7 26.5 14.2 4.9 2048 2 47.8 24.1 12.5 4.9 47.7 26.4 14.3 4.9 2048 3 47.7 24.1 12.5 5.0 47.7 26.4 14.2 4.9 2048 4 58.8 35.3 18.7 6.4 59.5 35.3 20.0 6.2 2048 5 47.7 24.1 12.4 4.8 48.3 26.5 13.8 4.9 2048 6 47.7 24.1 12.4 4.8 48.2 26.5 13.7 4.9 2048 7 47.7 24.0 12.4 4.8 47.7 26.5 13.8 4.9 2048 8 58.8 35.2 18.7 6.1 58.9 35.2 19.9 6.3 2048 9 47.8 24.1 12.5 5.0 47.8 26.5 13.9 4.9 2048 10 47.2 24.0 12.5 5.0 47.2 26.5 14.1 4.9 2048 11 47.1 24.4 12.5 5.0 47.8 26.5 14.0 4.9 2048 12 58.8 35.3 18.8 6.3 58.2 35.3 19.9 6.2 2048 13 42.6 24.2 12.5 4.9 42.7 26.5 13.7 4.9 2048 14 42.6 24.1 12.4 4.8 42.6 26.6 13.8 4.9 2048 15 42.6 23.9 12.5 4.9 42.6 26.7 13.8 4.9 2048 16 58.8 35.3 18.7 6.4 58.8 35.4 19.8 6.2 Roy Longbottom 14 November 1997