SDRAM Compatibility
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 :
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| 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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