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Item#: 9SIA5EM3PG5987

SUPERMICRO SYS-5046A-XB 4U Rackmountable / Tower Server Barebone Intel X58 LGA 1366 Intel Core i7 / i7 Extreme Edition, and Intel Xeon 5600/5500/3600/3500 series

  • 1 x LGA 1366 Support Intel Core i7 / Xeon
  • 6 x 240Pin Memory Slots (Max 24GB)
  • Support 6 x SATA 300
  • 865W AC power supp

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  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the SuperMicro SYS-5046A-XB



CPU Supported

CPU Type
Intel Core i7 990X, i7-980X, i7-975 and i7-965 Extreme Edition
Intel Core i7 series
Intel Xeon 5600/5500 series
Intel Xeon 3600/3500 series
CPU Socket
LGA 1366
Installed CPU
No CPU Installed
Max Processors


North Bridge
Intel X58
South Bridge

Memory Supported

Memory Slots
6 x 240Pin
Installed Memory Size
No Memory Installed
Max Memory Supported
Memory Type Supported
DDR3 1600/1333/1066/800
Channel Supported
Triple Channel
ECC Supported

Storage Supported

Installed HDD
No Storage Installed
Serial ATA
6 x SATA 300
RAID 0/1/5/10

Expansion Slots

PCI Express
2 (x16) PCI-e 2.0 slots
1 (x4) PCI-e slot (using x8 slot)


Onboard Audio
Realtek ALC883 7.1 HD audio


First LAN
Intel 82574L
Second LAN
Intel 82574L
Max. LAN Speed
Dual 10/100/1000Mbps

Expansion Bays

5.25" Bays
2 x 5.25" Peripheral Drive Bay
1 x 5.25" Bay For Floppy Drive
Hot-Swap Bays
6 x SATA Hot-swap Drives
2 x Spare Trays

Panel Ports

Front USB
Rear USB
Rear Audio Ports
6 x analog outputs
1 x S/PDIF digital output

Power Supply

Max. Power
865W AC power supply (cooling-redundant) w/ PFC


Color: Black

Intel Core i7-980X, i7-975 and i7-965 Extreme Edition
Intel Core i7 series
Intel Xeon 5600/5500 series
Intel Xeon 3600/3500 series

QPI (up to 6.4 GT/s)

Buttons: Power On/Off, System Reset

Power LED
Hard drive activity LED
2x Network activity LEDs
System Overheat / Fan Fail LED

SC743 SATA Backplane w/ Enclosure Management

2x 8cm Hot-swappable PWM Cooling Fans
1x 9cm Hot-Swappable Rear Exhaust PWM Fan
1x Active heatsink w/ heatpipe.

Supports nVidia SLI and ATI CrossfireX Technology.

Other: Chassis intrusion detection, Chassis intrusion header.

RoHS Compliant.


Form Factor
4U Rackmountable / Tower

Dimensions & Weight

25.5" x 17.2" x 7.0"
63 lbs.
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 3 years
  • Read full details

Customer Reviews of the SuperMicro SYS-5046A-XB

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  • Chris T.
  • 1/25/2012 4:34:12 PM
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsIt's Been Solid

Pros: Quiet and fast. We use this for software development for a team of 10 developers. Windows Server 2008 R2 with the adaptec RAID code base. OS is on 2 drives RAID 1 and VMs are on 4 drives RAID 10. Core i7 standard series processor 24 GB RAM, using a PCI RAID/IDE card to interface a CDROM and a simple PCIX 256 MB Video Card.

Cons: Would not post. Powered on and showed only the Overheat Light. Very Disapointing. Taked to SuperMicro Support and RMAed the Motherboard.

Other Thoughts: It has been solid for at least a couple years. Just bought another one. Hopefully it will work first time.

Did you find this review helpful? Yes No

  • Anonymous
  • 2/18/2010 9:24:02 AM
  • Ownership: 1 day to 1 week

5 out of 5 eggsAwesome Server box

Pros: Quiet, Quality!, Hot plug Sata Drives. Man is this thing NICE!

Can be rackmounted. Supermicro name!

Cons: Not available in an AMD version (if you can even call that a con)

Other Thoughts: Added a nice (8) port 3ware 9650 PCI X4 controler - with 8 WD 300Gb Raptor drives.
Added 12Gb Kingston Memory (2) KVR1066D3N7K3/6G
Added (1) Intel Xeon E5520 Processor

Wow this thing screams! It will absolutely KILL HP/Compaq hardware - cost about 1/10th as much.


1 out of 1 people found this review helpful. Did you? Yes No

  • Atiq M.
  • 10/12/2009 3:07:22 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsTwo bad apples in a row?

Pros: Sturdy box.

Cons: Lasted only a day. Not to mention this was the replacement for the last DOA.

BIOS was set to RAID and I created RAID 1 on the system before installing OS. Briefly turned on the BIOS self-test to make sure everything was fine. Also turned on the BIOS boot up details. Installed Vista x64, updated the three drivers from the Supermicro web-site. Installed other drivers and updates. Every install required a restart and it came back up fine. Enjoyed it for a few hours, installed a few applications, on one of the restarts the BIOS froze on checkpoint 78.

I rebooted a couple of times and was unable to get past check point 78. So I reset the BIOS by shortening the reset pads and also by taking the battery out. Reset cleared the BIOS boot up details so then I only saw frozen SUPERMICRO logo. Took all the components out and plugged them back in. Tried various bootable media: hard drive, DVD drives, USB flash, USB floppy, IDC floppy... nothing helped.

Other Thoughts: All in all I have spent four weeks in waiting for the machines, setting them up, diagnosing what's wrong, packing and shipping them back for RMA. I'm already behind my schedule. The next RMA will cost me at least another week. I cannot afford to take risks like this in the business.

Configuration was W3520 processor, Crucial CT25672BA133 (2G DDR3 1333 U ECC), 2 Velociraptor drives in RAID 1, GeForce 8800 GT, and LITE ON DVD.

Supermicro tech support was courteous and helpful but he did not have an immediate resolution. Newegg was helpful in RMAing both pieces.

1 out of 1 people found this review helpful. Did you? Yes No

  • Darren A.
  • 10/5/2009 6:04:50 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsAutodesk Inventor Workstation

Pros: Very easy to assemble. Plenty of room in the case. Can handle large graphics cards (AMD Radeon 5870).

Cons: Bios not really for overclocking. Somehow the BIOS reverted back to enhanced SATA instead of AHCI and that caused a few tense moments as Windows 7 blue screened during startup due to driver mis-match. Win7 was also unable to diagnose and repair the drivers. I just happened to look in the BIOS and notice that some items had changed. Have no idea what caused it, but it coincided with plugging in a new DVI monitor, that I originally setup with D-Sub. Could be a coincidence.

Have to use one of the 6 available SATA connections for a CD/DVD drive.

Do not quite understand why Supermicro put 2 standard USB ports on the motherboard. For internally mounted USB devices the header pins are more standard, so I had to go buy a couple of cables to hook up an internal flash card reader.

Other Thoughts: Very good setup with a i7-920 for a 3D CAD workstation. The 5870 drivers will need to mature some to be on par with the older drivers I use with a 4870 on another Workstation. So far I have had very good luck with ATI/AMD gaming graphics cards for the newer Autodesk software, since they are moving to all DirectX and away from OpenGL.

For some reason the two storage drives I am using will have the status lights blinking red on re-starts. I can go in the Intel Matrix utility, right mouse click on the drive and select activate LED and the blinking will stop. There are no problems with the drives, so I do not know why the SATA cage LEDS indicate a drive failure on restart. The board has revision 1.0b for the BIOS, so that could be the problem, but since Supermicro does not comment BIOS updates I do not know if 1.0c will fix the problem.

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  • Atiq M.
  • 9/23/2009 7:45:00 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsdidn't work

Pros: Case is solid built, good-ventilation, and easy to work with. Nice heat-sink.

Cons: Didn't work. Upon power on the system gives two beeps and nothing happens. Called Supermicro tech support. They asked me to unplug memory, video card, drives, and battery etc. Power on with just the CPU. I did that, again two beeps and nothing. I was using W3520 microprocessor and Crucial memory (PC3 10600 ECC Unbuffered) that is listed as tested on the Supermicro web-page.

Other Thoughts: Supermicro manual and web page says it comes with a round floppy cable (CBL-0112L). There was no such cable in the box.

Their included checklist says the box has Air shroud (MCP-310-74301-ON) and Rails kits Assy (CSE-PT26L-B). No such parts in the box.

None of these parts are shown in the Newegg product photos either.

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  • Cory C.
  • 7/15/2009 12:51:51 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsNICEEEE

Pros: Nice Little Barebone kit- just built another one- Rock Solid construction, nice PS and nothing complains with a 3ware sata controller and 8 raptors :)

Yeah on RAID ten this is one fireball of a web/mail/exchange server

Cons: OE Fans are okay, but I swapped the 4 behind the drive cage for some vantec tornados, just a word to the wise.... dont do that unless this thing is in your server closet it will be loud as all get out- but its worth it when during heavy use your HDD's are only 5 degrees above room temp.

Other Thoughts: Overall nice kit, keep it up SM. :)

Did you find this review helpful? Yes No

  • Mark G.
  • 5/11/2009 11:18:41 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat server

Pros: Solid build, super quite, easy to work on.

Cons: Only two expansion slots available, no built in video, SATA controller on MB only supports 6 drives.

Other Thoughts: If you put in your own SATA RAID card (and you should) you'll need pretty long SATA cables. I used 18" and they just reach.

If you install a floppy (ie, so you can load the RAID card driver in a Windows install) you'll need a super long floppy cable, the floppy connector is as far away from where the floppy drive goes as is possible.

Not PATA connections at all so be sure to get a SATA DVD/CD drive... oh, and that eats one of the 6 SATA connectors on the MB...

2 out of 2 people found this review helpful. Did you? Yes No

  • Joel K.
  • 4/20/2009 7:19:05 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsIts HUGE! ;-D

Pros: Solidly built system all around! Connectors/cables setup and ready to go. Clean ... and so far very reliable - hotplug works nicely. Quite happy.

Cons: Would also be nice if it could have used 120mm fans instead of the 90mm ones it has. Its fairly quiet but still has some rear exhaust noise that's louder than expected and a bit irritating frequency wise and can be heard over the drives. Still fairly quiet all things considered.

Dual power supply fans run at high speed when system is off but plugged in - so its actually noisier when off versus when its on and all fans are (PWM) speed controlled.

Remember - 8 drive slots but only 6 SATA connectors. Need a separate controller to fill the case. No SATA/IDE connector for DVD/CDROM.

Other Thoughts: Its heavy and extra long ... not at all bad just something to note.

Two T-SGPIO cables connect motherboard to SATA backplane - so if you want to replace the motherboard you and have full functionality - you will need an HBA/chipset that supports this feature.

0 out of 1 people found this review helpful. Did you? Yes No

  • Leslie H.
  • 4/14/2009 11:47:48 AM
  • Ownership: 1 month to 1 year

5 out of 5 eggs2 TB limit on Hard Disks

Pros: Great barebones system, solid design, the chassis would withstand a nuclear strike. The C7X58 has a balance between performance and stability, and has been certified by both nVidia SLI and ATI CrossFire for dual graphics support.
Now, the 2 TB limit:
The Windows XP-32 2 TB limit is per-volume. There is a limit to the total number of sectors that a MBR partition table can have. With the standard 512K sectors, that limit is about 2TB, which would be inclusive of all partitions on the drive/array. The partition table has a count of the start and end sectors of each partition, so you can not create a 2 TB partition and then have another beyond that on a larger than 2 TB drive.
The 2TB volume size is a limit of the MBR partition - not Vista , XP, NTFS, Linux, 32bit, 64bit, etc. The MBR structure only supports 4 primary partitions. Three common means of exceeding the 2 TB limit in a single volume are:
1. RAID controller that supports LBA64.
see 2 more items below under other thoughts

Cons: You have to watch using a SATA Optical drive and the SATA hard disks for RAID configurations. It seems the Adaptec drivers don’t want you to have a SATA CD-ROM drive installed.

Other Thoughts: The 2 TB limit is not related to the hardware.

continued from pro's
2. Use dynamic disks or an application like unRAID that combines physical volumes by using dynamic volumes.
3. Use GPT volumes.

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  • Anonymous
  • 3/3/2009 12:41:32 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat setup, but with one issue

Pros: The wire management in this case is par none. Everything has it's place in this case. Great hot swap SATA3 bays and Intel/Adaptec RAID controllers. No sharp edges inside the case and plenty of expansion available. Server is silent with the provided heat sink.

Cons: Couldn't get the ACH10R drivers to install XP on a RAID array. Windows would bluescreen when getting to the half-way point of the windows installation. Really not this products' fault, but the motherboard drivers could have issues. Had to remove a drive from a raid array and stripe the rest of the drives to make redundancy. Drives were three TB so I lost 1tb of capacity.

Other Thoughts: Great buy for the money, would buy again. Ended up with a nice i7, 6gb of ram and 3tb of hard drive space. Great little file server.

Did you find this review helpful? Yes No

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Item#: 9SIA5EM3PG5987
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