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CPU Types  | AT.R5100.504  | AT.R5100.506  | 
CPU max. support  | Intelฎ Xeonฎ DP Q uad-Core E 5607 (2.26 GHz, 4.80 GT/sQPI)  | Intelฎ Xeonฎ DP Quad-Core E5640 (2.66 GHz, 5.86 GT/sQPI)  | 
CPU Cache  | 2  | 2  | 
Memory  | 8MB L3 Cache  | 8MB L3 Cache  | 
Memory max. support  | 2GB (1x 2GB)  | 4GB (2x 2GB)  | 
ECC DDR3 1333MHz Registered  | ECC DDR3 1333MHz Registered  | |
Graphics  | Up to 192 GB Max (18 DIM M slot)  | Up to 192 GB Max (18 DIM M slot)  | 
PCI Slots  | Embedded graphics controller with 16 MB video memory  | Embedded graphics controller with 16 MB video memory  | 
(Total#,#,x xbit/xxxM H z)  | One PCI Expressฎ 2.0 x16  | One PCI Expressฎ 2.0 x16  | 
Harddisk  | One PCI Expressฎ 2.0 x8  | One PCI Expressฎ 2.0 x8  | 
Std. HDD Controller  | 1x 300G B 2.5" SAS 10,000 RPM  | 1x 1TB 2.5" Enterprise SATA 7,200 RPM  | 
H /W RA ID C ontr oller  | Integrated eight-port SATA S /W RAID 0,1,5*,10  | Integrated eight-port SATA S/W RAID 0,1,5*,10  | 
Max. # Internal Disks supports  | H /W RA ID 0/1/10/5/50/6/60 w ith 512M B cache  | -  | 
Optical device  | 8 x 2.5" Hot Plug bays for SATA /SAS HDD  | 8 x 2.5" Hot Plug bays for SATA/SAS HDD  | 
Onboard Gigabit Ethernet  | DVDRW (Slim-type)  | DVDRW (Slim-type)  | 
Redundant Power Supply  | Yes, Quad  | Yes, Quad  | 
Form Factor  | 1+1 hot-swappable, redundant power supply (optional)  | 1+1 hot-swappable, redundant power supply (optional)  | 
Sliding Rail Kit  | 1U rack-optimized  | 1U rack-optimized  | 
OS Support  | Free Bundled!!  | Free Bundled!!  | 
Windows Server 2008 (x86/EM 64T )  | Windows Server 2008 (x86/EM 64T)  | |
Windows Server 2008 R2 (EM 64T)  | Windows Server 2008 R2 (EM 64T)  | |
Windows Server 2003 Enterprise Edition  | Windows Server 2003 Enterprise Edition  | |
Red Hat Enterprise Linux 5.4 (x86/EM64T)  | Red Hat Enterprise Linux 5.4 (x86/EM64T)  | |
SuSE Linux Enterprise Server 11 (x86/EM64T)  | S uS E Linux Enterprise Server 11 (x86/E M 64T )  | |
VMWare ESX 4  | VMWare ESX 4  | |
VMWare ESXi 4 Installable  | VMWare ESXi 4 Installable  | |
Warranty  | VMWare ESXi 4 Embedded  | VMWare ESXi 4 Embedded  | 
Promotion for End User  | 3 Yrs warranty Part & Labor, 5x8, Onsite Sevice NBD Thailand  | 3 Yrs warranty Part & Labor, 5x8, Onsite Sevice NBD Thailand  | 
Acer S mart C onsole (KVM over IP )  | Acer Smart Console (KVM over IP )  | |
Acer Smart Server Manager (S/W Management)  | Acer Smart Server Manager (S/W Management)  | |
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