Presentation on theme: "MEMORY TECHNOLOGY FOR SMALL FORM FACTOR SYSTEMS"— Presentation transcript:
1MEMORY TECHNOLOGY FOR SMALL FORM FACTOR SYSTEMS Bill GervasiChairman, JEDEC Memory Parametrics
2Market Changes Desktop PC getting smaller and smaller Flex/ATX form factorTiny sealed box legacy free PCsServer market shifts to 1U form factorPacking more CPUs into a smaller frameHeat dissipation a top concernPerformance ramping higher and higherSystem (fan) noise concerns
4Combine market segments DIMMSO-DIMMMicroDIMMHigh capacity server, “4U”, WorkstationDesktop, Notebook, “1U”, Router, BladesSubnotebook, PDA64MB – 2GB per slotMB per slotMB per slot
5It’s Time for a Change PC demand plateau at 128-256 MB DDR SO-DIMM clearly meets this need30% of FlexATX PCB is memory sockets & traces1U = 86% of server market (by unit)Trying to fit 6-8 CPUs in one 19” rackIncreasing operating frequency harder to achieve with 5¼“ DIMM
10FlexATX Footprint With DIMM: 17k mm2 With SO-DIMM: 7k mm2 North BridgeCopperSlotsWith DIMM:17k mm2With SO-DIMM:7k mm2Area saved ~ 60%
11Server Market 1U form factor or blade 600 MHz x86 CPU 256MB – 1GB RAM (by unit shipment; source = Intel)
121U Thin and 3U Blades1UVertical SocketRight Angle Socket3U
13Which do you think will run the fastest? Operating FrequencyDIMM4,8,9,16,18,36 chipsx4, x8, x16 devicesUnbuffered or RegisteredSO-DIMM4,5,8 chipsx8, x16 devicesUnbuffered OnlyMicroDIMM4,8 chipsx16 devicesUnbuffered OnlyWhich do you think will run the fastest?
17Of course, no one will make the move unless Discussions Under WayBegan negotiations with the major mother board manufacturers – all are open to evaluating the conceptOf course, no one will make the move unlessWE ALL MOVE TOGETHER
18Fire Started One major embedded application on the hook Production of 250 Ku/mo beginning 1Q02Enough to kick start the programTask group formedConference calls to gather requirementsSocket suppliers debating implementation & cost details
19We have an opportunity to establish the DDR SO-DIMM as the highest volume, lowest cost, highest performance memory module in the industry.
20What about MicroDIMM? Notebooks & subnotebooks PDAs and Web Tablets High density 1U servers???
21Interconnect fabric and I/O High Density 1UMemCPUCPUMemMemCPUCPUMemInterconnect fabric and I/OMemCPUCPUMemCPUCPUMemMem
22MicroDIMM Requirements DDR MicroDIMM used in high density 1URight angle socket okay… 1x2” footprintOne module per CPUNo vertical socket demand seen… yet…
26Fanless Desktop PC? What doesn’t fit? MP3 music 100W per channel amp Bose surround sound speaker systemPC fans with 75 dB of white noise
27Lower Voltage means Lower Power Power: DDR vs SDRLower Voltage means Lower PowerPC133(3.3V)2.0XPC100(3.3V)1.2XDDR266(2.5V)1.0X
28Double the Bandwidth yet Lower Power Power: DDR vs SDRDouble the Bandwidth yet Lower PowerDDR2661.0XPC100.31XPC133.25X
29DDR Reduces Power Using DDR for main memory helps control system power Lower power reduces or eliminates need for fans
30Bold ProjectionFanless desktop PCs for home and small office will become a significant market demandDDR will help enable this important market segment
31Another Wild Card Low Power SDR 1.8VNo DLLInventive refresh optionsSome focus here, especially for cell phones… will it spread?Features considered for DDR family, too
32Cached DRAM Power Profile Higher PowerPage Miss Power Profile…NOPACTR-PRER…RNOPCommand ActivityPage Hit Power ProfileLower PowerNOPRRRRNOPCommand Activity
33Conclusions Market form factors are changing New designs require rethinking our past assumptionsDDR SO-DIMM could replace the DIMM for desktop applicationsLower power would allow us to eliminate noisy fans