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SDRAM Compatibility

Review of Slot 1 Motherboards with Intel 440BX Chipset - Spring 1998
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The next test was the RAM compatibility test. I was using a 64 MB Corsair PC100 w/parity module which uses Samsung SDRAM chips (KM48S8030BT = 2Mx8x4, 4k refresh, mapping 14/11) and a 64 MB Toshiba PC100 module (TC59S6408FTL-80H = 4Mx4x4, 4k refresh, mapping 12/9). I also used two 32 MB Samsung PC66 SDRAM modules (module : SEC KMM366S403BTN-G0, chips : SEC KM48S2020BT-G10 = 2Mx8x2). It’s my experience that modules with 2Mx8 chips are running better than with 4Mx4 architecture. Corsair has always used 2Mx8.

These are the results :

PC100 Memory Compatibility Samsung SPD PC66 running at 100 MHz ?
Abit BX6 both memories stable up to 112 MHz yes, even at 112 MHz !!
AOpen AX6B both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !! Change RAS-CAS delay to 3
Asus P2B both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !!, Memory Timing to ’by SPD’
Chaintech 6BTM both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !! Change RAS-CAS delay to 3
DFI P2XBL (Yakumo Y686BX) both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !!
DFI P2XBL/S both memories stable up to 112 MHz yes, even at 112 MHz !!
Elitegroup P6BX-A+ both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !! Change RAS-CAS delay to 3, SDRAM Leadoff to 4, other 2 values to 3 as well
Intel SE440BX both memories stable no ! Board detects SPD and reports wrong spec, then system halts.
Iwill DBS100 Samsung only ! yes, at slowest memory timings
Microstar MS-6119 both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !! RAS to CAS delay ’3’
QDI Brilliant I / P6144BX both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !! RAS to CAS delay ’3’
Siemens D1064-E both memories stable board wouldn’t even boot
Soyo SY-6BA both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !! RAS to CAS delay ’3’
Supermicro P6DBS Samsung at fast settings, Toshiba only at slow settings yes, slow settings 3-3-3-4
Supermicro P6SBA both memories stable at fast settings yes, slow settings 3-3-3-4
Tekram P6B40-A4X both memories stable at fast settings up to 112 MHz yes, even at 112 MHz !! RAS to CAS delay ’3’
Tyan Tiger 100 S1832DL Samsung only yes, at slowest memory timings
Tyan Tsunami S1846 both memories stable at fast settings yes, even at fast memory timings
Tyan Thunder 100 Pro S1836DLUAN both memories stable at fast settings yes, even at fast memory timings
Zida Tomato Board 6ABX both memories stable at fast settings yes, even at fast memory timings
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