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Item#: N82E16819117110

Intel Xeon X5355 Clovertown 2.66 GHz 2 x 4MB L2 Cache LGA 771 120W BX80563X5355A Active or 1U Processor

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  • 1333 MHz FSB
  • 65 nm Clovertown
  • 2 x 4MB L2 Cache
  • 120W

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Quad Core Xeon X5355 processor delivers impressive performance per watt numbers and up to 4 times the performance of earlier generation single-core processors. Each core runs at 2.66GHz and an FSB speed of 1333MHz will make short work of any task you throw at it. A massive 8MB increases efficiency of L2 cache-to-core data transfers, maximizing main memory to processor bandwidth and reducing latency,up to 4MB of L2 cache can be allocated to one core The 64bit cores are designed to handle all of today’s x86 32bit software with ease and effortlessly migrate to 64bit software.

Fully buffered DIMM technology allows up to 21GB/s which is 3 times the bandwidth of previous technology. You also get 4 times the memory capacity of up to 64GB. Intel Acceleration Technology helps with this and cuts CPU overhead by up to 40% which lets it handle other tasks more efficiently.

You also get Intel Virtualization Technology hardware enhancements that support software based virtualization. It works with VMware, Virtual PC and XenSource and products from an increasing number of software vendors. This combined with the processor’s great power efficiencies let you run virtual environments on 1U and blade systems fewer cooling challenges which gives you maximum power and services per square foot of server space.

  • newegg Quad-core Processing with 8MB L2 Cache The Intel Xeon X5355 processor features four complete processor cores in one physical package. Significant performance headroom, especially for multi-threaded applications, helps boost system utilization through virtualization and application responsiveness. Its 8MB (2 x 4MB) L2 cache increases efficiency of L2 cache-to-processor data transfer, maximizes main memory to processor bandwidth and reduces latency.
  • newegg Supports Intel Virtualization Technology (Intel VT) With Intel VT, one hardware platform functions as multiple “virtual” platforms. For business, Intel VT offers improved manageability, limiting downtime and maintaining worker productivity by isolating computing activities into separate partitions. In the home, Intel VT allows creating unique user environments for multiple family members using the same platform simultaneously.
  • newegg Intel Extended Memory 64 Technology (Intel EM64T) Enhances next-generation IA-32 platforms with 64-bit addressability and related instructions, allowing flexibility for both 64-bit and 32-bit applications and operating systems.
  • newegg Execute Disable Bit (EDB) Intel's Execute Disable Bit function can prevent certain classes of malicious "buffer overflow" attacks when combined with a supporting operating system. Execute Disable Bit allows the processor to classify areas in memory where application code can execute and where it cannot. When a malicious worm attempts to insert code in the buffer, the processor disables code execution, preventing damage or worm propagation.
  • newegg Enhanced Intel SpeedStep Technology (EIST) EIST allows the system to dynamically adjust processor voltage and core frequency to decrease average power consumption and average heat production. Combined with existing power saving features, EIST may provide an excellent balance between providing power when you need it and conserving power when you don’t.

Learn more about Xeon X5355

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Customer Reviews of Xeon X5355

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  • Eric S.
  • 1/28/2008 9:15:15 PM
  • Ownership: 1 month to 1 year

5 out of 5 eggsGreat performance

Pros: Look at the benchmarks. Running two of these puts you among the top-performing personal computers available.

Cons: Stock coolers are loud, and don't cool as well as they should.

Other Thoughts: I simply replaced the stock coolers with copper-finned heatsinks, and rigged up a cooler with two 120mm high-cfm fans to blow directly on the heatsinks. Works like a charm!

I have been using two of these for 6 months. I write some fairly CPU-intensive multithreaded applications, and this setup really shines like the benchmarks suggest. Enormous improvement over my previous Core 2 Extreme qx6700 setup.

P.S. - A 1000 watt PSU isn't necessary unless you plan on installing an 8800 Ultra, 8 sticks of FB-dimm memory, etc. 750 is plenty for a small server setup.

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  • Michael S.
  • 1/12/2008 11:12:48 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggs

Pros: This processor is great. I have 2 running together and my rendering times went from (one example) 1 hour and 23 min to 6 min. Huge difference.

Cons: You will know they are there. Sounds like a small hovercraft in my office.

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  • ALI A.
  • 11/17/2007 6:12:47 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsExcellet Processor

Pros: Runs fast and great. Handles load extremely well. I run 15 virtual machine on a single proc server, and it doesn't even even hit the 50% load while I'm completely out of my 16GB memory.

Cons: Pricy, but I suppose you get what you pay for. Low memory bandwidth for such processor comparing to AMD counterparts, even a low end 2246HE I'm running my Debian server on.

Other Thoughts: I'm an AMD fan boy and this is my first Intel processor ever since Athlon XP hit the market. I had no choice but to buy Intel when AMD failed to deliver their quad core on time. I'm quite happy with the purchase, but it doesn't take away the guilty feeling at all. Anyway... I'm kinda even now that I also purchased my first AMD quad core.

3 out of 3 people found this review helpful. Did you? Yes No

  • Mindy S.
  • 6/4/2007 8:12:53 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsSimply the fastest

Pros: Can decode a DVD in 30 seconds, always enough power to handle multiple programs, even large games switch back and forth smoothly.

Cons: Heatsink is loud.

Other Thoughts: You could add a second, but do you need it? Probably not! I've got this, the S5000Xvn motherboard, 4GB ram, 8800GTX, and X-Fi Elite pro. I couldn't ask for a better system.

4 out of 5 people found this review helpful. Did you? Yes No

  • Anonymous
  • 4/26/2007 7:31:08 PM
  • Ownership: 1 month to 1 year

5 out of 5 eggsFast but hot and hungry.

Pros: Great performance. Handles extremely high loads without getting bogged down. Has worked great powering several servers we are running in VMWare.

Cons: Runs pretty hot under max load. The heatsink/fan it comes with are not good enough.

Get a good PSU of at least 1000 watts. A couple of these, RAID array, and all the fans you need are power hungry.

Other Thoughts: If you choose to use 64 bit Linux or BSD OS it can be a bit of a pain to get everything installed and compiled correctly. Most apps' 64 bit support isn't as good as 32 bit although eventually everything we use worked. VMWare Server has to run in 32 bit which was a pain to figure out.

6 out of 6 people found this review helpful. Did you? Yes No

  • Anonymous
  • 3/10/2007 5:30:48 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsBlazin'

Pros: Put 2 of these in a Tyan 2696 and loaded FC6....yowza - makes the old XEONs (dual 3.0 single core) feel like a slow train to nowhere.

Cons: Heat sink is a tonner - and doesn't do that great of a job - you definitely need the active vs. passive and lotsa air flow.

Other Thoughts: Some of the speed over AMD is no doubt due to the 8MB of L2 vs. Opteron 2MB....but still - 8 cores in a workstation is some good juice.

11 out of 13 people found this review helpful. Did you? Yes No

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