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CPU Intel P4 840 D P4 820 D P4 630 P4 640 P4 650 P4 660 P4 670 AMD Athlon64 3500+ 3700+ 3800+ 4000+ X2-3800+ X2-4200+ X2-4400+ X2-4600+ X2-4800+ 1-Way Opteron Opteron 144 Opteron 146 Opteron 148 Opteron 150 Opteron 152 2-Way Opteron Opteron 240 Opteron 242 Opteron 244 Opteron 246 Opteron 248 Opteron 250 Opteron 252 2-Way Dual Core Opteron Opteron 270 Opteron 275 nVidia GF 7800GT GF 6800GT GF 6600GT ATI R X850 XT PE R X850 XT R X800 XT PE R X800 XT R X800 XL Memory Corsair Crucial Kingston Mushkin OCZ |
LOSTCIRCUITS |
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| High Performance DDR DIMMs Ups and Downs or "how do I keep my stick happy?" | |
| (Review by MS, July 17, 2001) |
The Test Candidates
128 MB Density
After the above said, it should be clear that it is impossible to do a fair comparison between 128 and 256 MB DIMMs and for this reason the modules are grouped by density. To start out, let's take a look at where we came from:
Micron 128 MB Engineering sample 266 MHz

A double-sided 266 MHz CL2.5 Micron Engineering sample using two banks of 8Mx8 PC2100 DDR chips
Micron has discontinued the 8Mx8 DDR chips (64 Mbit density) since the production of 16Mx8 (128 Mbit) is more cost effective and allows higher density modules (256 MB in a double sided configuration). Note that all 8 chips are on one side.

Standard Crucial 128 MB Module as it is available from Crucial's On-Line store
Mosel-Vitelic was kind enough to ship a few chips so that we could solder them onto a PCB for testing. The chips were untested Alpha Silicon without tweaks based on an Infineon Design. The cleaned up revision of these chips is supposed to run up to 166 MHz at 2:2:2 timing and a whopping 85 centigrades

A prototype of what the Mosel-Vitelic DIMMs might look like once they hit the street

Close-up of the Mosel-Vitelic chip. Markings and serial numbers may change in the final revision. In addition, Mosel-Vitelic is ramping up the production of 256 Mbit chips to allow for densities of 256 MBytes (single sided) and 512 MBytes (double sided) which will hit the streets within the next few weeks. One specialty of the Mosel-Vitelic chips is their extremely low power consumption that can be as little as 1/10 of comparable Samsung chips.
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