Server PC Memory

One of the most crucial pieces in your computer's hardware is the Synchronous Dynamic Random Access Memory or SDRAM. It gives the computer the ability to pick a certain data from the memory that you wish to use. As opposed to sequential access memory (SAM) like that of a tape drive, the computer doesn't have to go through all the other data in order to pick out its target. So whether you're buying an entirely new desktop computer or just upgrading your PC memory, naturally, you'd look for a fast RAM. But speed isn't everything, and as what you'd learn later there are other factors worth looking at before buying one. Read buying guide

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  • Crucial 16GB 2 x 8 GB DDR4 SDRAM Memory Module - For Server - 16 GB 2 x 8 GB - DDR4-2400 PC4-19200 DDR4 SDRAM - CL17 - 1.20 V - - CT2K8G4DFD824A
    $131.24
  • Kingston ValueRAM 32GB 4 x 8GB DDR4 SDRAM Memory Module - 32 GB 4 x 8 GB - DDR4 SDRAM - 2133 MHz DDR4-2133 PC4-2133 - 1.20 V - ECC KVR21R15D8K4
    $563.04
  • HPE 8GB DDR3 SDRAM Memory Module - For Server - 8 GB 1 x 8 GB - DDR3-1600 PC3-12800 DDR3 SDRAM - CL11 - ECC - Unbuffered - 240-pin - 669324-B21
    $206.40
  • Kingston 32GB DDR4 SDRAM Memory Module - For Server - 32 GB - DDR4-2400/PC4-19200 DDR4 SDRAM - ECC - Registered
    $313.43
  • Hynix original 8GB (1 x 8GB), 204-pin SODIMM, DDR3 PC3L-12800, 1600MHz memory module (HMT41GS6BFR8A-PB)
    $34.64
  • Kingston 32GB DDR4 SDRAM Memory Module - For Server - 32 GB - DDR4-2400/PC4-19200 DDR4 SDRAM - ECC - Registered (KTH-PL424/32G)
    $311.99
  • 8GB RAM Memory for Cisco UCS C210 M2 (DDR3-10600 - Reg) - Server Memory/Workstation Memory Upgrade (1223858-CI-8Go)
    $45.75
  • Hewlett-Packard HPE 16GB (1x16GB) Dual Rank x4 DDR4-2133 CAS-15-15-15 Registered Memory Kit - For Server - 16 GB (1 x 16 GB) DDR4 SDRAM - CL15 - Registered (726719-B21)
    $1,435.76 $1,651.12 13% off
  • AddOn AddOn AM1600D3DR8EN/8G x1 Replacement for HP A2Z50AA Compatible Factory Original 8GB DDR3-1600MHz Unbuffered ECC Dual Rank x8 1.5V 240-pin CL11 UDIMM - 100% compatible and guaranteed to work - TAA Compliance (A2Z50AA-AM)
    $104.30 $119.95 13% off
  • AddOn AddOn AM1600D3DR8EN/8G x1 Dell A6457991 Compatible Factory Original 8GB DDR3-1600MHz Unbuffered ECC Dual Rank x8 1.5V 240-pin CL11 UDIMM - 100% compatible and guaranteed to work - TAA Compliance (A6457991-AM)
    $104.30 $119.95 13% off
  • AddOn AddOn AM1066D3QR4VRN/32G x1 Replacement for HP 628975-081 Compatible Factory Original 32GB DDR3-1066MHz Registered ECC Quad Rank x4 1.35V 240-pin CL7 Very Low Profile RDIMM - 100% compatible and guaranteed to work (628975-081-AM)
    $249.90 $287.39 13% off
  • AddOn AddOn Lenovo 16GB DDR4 SDRAM Memory Module - 16 GB - DDR4 SDRAM - 2666 MHz DDR4-2666/PC4-21300 - 1.20 V - ECC - Registered - 288-pin - DIMM (7X77A01303-AM)
    $187.27 $215.36 13% off
  • AddOn AddOn JEDEC Standard Factory Original 16GB DDR4-2666MHz Registered ECC Dual Rank x8 1.2V 288-pin CL17 RDIMM - 100% compatible and guaranteed to work (AM2666D4DR8RN/16G)
    $187.27 $215.36 13% off
  • AddOn AddOn AM2133D4SR4RLP/8G x1 Replacement for HP 774170-001 Compatible Factory Original 8GB DDR4-2133MHz Registered ECC Single Rank x4 1.2V 288-pin CL15 RDIMM - 100% compatible and guaranteed to work (774170-001-AM)
    $111.04 $127.70 13% off
  • AddOn AddOn AM2133D4SR4RLP/8G x1 Replacement for HP 752368-081 Compatible Factory Original 8GB DDR4-2133MHz Registered ECC Single Rank x4 1.2V 288-pin CL15 RDIMM - 100% compatible and guaranteed to work (752368-081-AM)
    $110.32 $126.87 13% off
  • AddOn AddOn AM2133D4SR4RLP/8G x1 Lenovo 46W0788 Compatible Factory Original 8GB DDR4-2133MHz Registered ECC Single Rank x4 1.2V 288-pin CL15 RDIMM - 100% compatible and guaranteed to work - TAA Compliance (46W0788-AM)
    $111.04 $127.70 13% off
  • AddOn AddOn AM2133D4SR4RLP/8G x1 Lenovo 4X70G78061 Compatible Factory Original 8GB DDR4-2133MHz Registered ECC Single Rank x4 1.2V 288-pin CL15 RDIMM - 100% compatible and guaranteed to work - TAA Compliance (4X70G78061-AM)
    $111.04 $127.70 13% off
  • AddOn AddOn AM1600D3SR8VEN/4G x1 JEDEC Standard Factory Original 4GB DDR3-1600MHz Unbuffered ECC Single Rank x8 1.35V 240-pin CL11 Very Low Profile UDIMM - 100% compatible and guaranteed to work (AM1600D3SR8VEN/4G)
    $68.98 $79.33 13% off
  • AddOn AddOn AM1333D3DRLPR/8G x1 Dell A4188260 Compatible Factory Original 8GB DDR3-1333MHz Registered ECC Dual Rank 1.5V 240-pin CL9 RDIMM - 100% compatible and guaranteed to work (A4188260-AM)
    $55.20 $63.48 13% off
  • AddOn AddOn AM1333D3QRLRD/32GB x1 IBM 90Y3105 Compatible Factory Original 32GB DDR3-1333MHz Load-Reduced ECC Quad Rank 1.35V 240-pin CL9 LRDIMM - 100% compatible and guaranteed to work (90Y3105-AM)
    $276.20 $317.63 13% off
  • AddOn AddOn AM1333D3SRLPR/4G x1 Replacement for HP 652504-B21 Compatible Factory Original 4GB DDR3-1333MHz Registered ECC Single Rank 1.5V 240-pin CL9 RDIMM - 100% compatible and guaranteed to work (652504-B21-AM)
    $48.15 $55.37 13% off
  • AddOn AddOn AM160D3DR4RN/16G x1 Fujitsu S26361-F3781-E516 Compatible Factory Original 16GB DDR3-1600MHz Registered ECC Dual Rank x4 1.35V 240-pin CL11 RDIMM - 100% compatible and guaranteed to work - TAA Compliance (S26361-F3781-E516-AM)
    $71.86 $82.64 13% off
  • AddOn AddOn AM1333D3QRLRD/32GB x1 Fujitsu S26361-F3698-L517 Compatible Factory Original 32GB DDR3-1333MHz Load-Reduced ECC Quad Rank 1.35V 240-pin CL9 LRDIMM - 100% compatible and guaranteed to work (S26361-F3698-L517-AM)
    $276.20 $317.63 13% off
  • AddOn AddOn AM1333D3SRLPR/4G x1 Replacement for HP 647647-171 Compatible Factory Original 4GB DDR3-1333MHz Registered ECC Single Rank 1.35V 240-pin CL9 RDIMM - 100% compatible and guaranteed to work (647647-171-AM)
    $48.15 $55.37 13% off

Buying guide

Types of PC MemoryComputer Memory on Shopbot

Before the year 2000, all SDRAMs can only perform under the single data rate (SDR) interface. But as computers grew more powerful, so did the demand for a faster memory. This is when the double data rate (DDR) technology entered the scene. The DDR interface nearly doubles the processing speed of SDR while significantly reducing operational temperature and power consumption which made it the current standard in the industry. Its conception, in turn, gave birth to the three most common types of PC memory: DDR, DDR2 and DDR3.

DDR

 

The DDR interface is the first step in the evolution and was quite promising during its heyday. If your computer has been around for less than a decade, then most probably, it has a DDR-SDRAM. It comes in 184-pin DIMM format (see form factors) and has a clock rate of 100-200 MHz. Compared to the original SDR-SDRAM, the DDR consumes less electricity at 2.5 volts while delivering faster transfer rates of up to 400 MTps. For as long as they have the same speed, you can attach more than one DDR inside your CPU. 

DDR2

 

Just a few years after it first came out, the DDR proved insufficient, and DDR2 technology knocked it off from the pedestal. Sporting a 240-pin DIMM format, it promised to give PC owners back then more (200-533MHz clock rate, 1066MTps) for less (1.8 volts). You can even use multiple DDR2 SDRAMs with different speeds, however, the faster one will adapt to match the slower SDRAMÕs speed.

349-PC_Memory > CorsairMemory

DDR3

 

Though soon to be dethroned by DDR4, the DDR3 is the current SDRAM chipset standard. It also comes in the 240-pin DIMM format like the DDR2, however, you may not insert it into a DDR2 socket as its slots are slightly different.

 

It clocks at 400-1066MHz, has a maximum transfer rate of 2133MTps and is even more energy efficient, chugging only 1.5 volts.

Form factor

 

With so many manufacturers of computer parts all over the world, it is important for them to agree on the dimension, shape and other details of the products they produce, The standard created to refer to these external features is called form factor. With the form factor, it is possible to assemble a PC from parts with different brands. Remember, though, that you can only use a certain SDRAM form factor if your motherboard chipset supports it. Usually, the way to distinguish one form factor from another is the number of pins. The most common form factor today is the DIMM (dual in-line memory module). DDRs in DIMM format have 168 pins, DDR2 has 200 or 240 pins, while DDR3 has 240 pins, as well. Even if two SDRAM types have the same number, as in the case of the 240-pin DDR2 and DDR3, they can't be switched to fit each other's sockets because their "voltage keys" (indents separating the pins) are positioned differently.

 

With the DDR2's voltage key is near the center while DDR3's nearer to the left. The small outline DIMMs or SO-DIMMs and MicroDIMMs are just the smaller versions. Being more compact, they're more apt for use in devices that use less power such as laptops, sub-notebooks, network printers and routers. The fully buffered DIMM (FB-DIMMs), on the other hand, can be considered the elite version of the DIMM format. The most obvious difference that you'd see is that FB-DIMMS have lower pin count. But what really sets it apart from the mainstream SDRAM form factors is that it has an advanced memory buffer (AMB) that sends out signals among the controller, memory devices, and other modules without compromising its integrity and speed. It's also equipped with a cyclic redundancy check (CRC) to lessen transmission errors, making it the ideal SDRAM format for servers, critical networking equipment and high-end desktop computers.

Memory Speed349-PC_Memory > G.skill_Memory

 

SDRAMs have coded monickers that may be enough to turn you off, specially if you don't know how to read them. To understand these codes, you must first know that SDRAMs have a "friendly" name and a corresponding industry name, both of which describes the memory's specs. The friendly name starts with the SDRAM type, like "DDR-", "DDR2-", or "DDR3-" followed by the numerical value of its data rate or bandwidth per second. The industry name, on the other hand, starts out with "PC-", "PC2-", or "PC3-" (which corresponds to DDR, DDR2, and DDR3, respectively), followed by the peak transfer rate which is usually eight times the bandwidth per second. So for example, a DDR3 has the friendly name "DDR3-800", its industry name will then be "PC3-6400".

 

There are instances however, that SDRAM manufacturers round down the peak transfer rate in the industry name to make it look nicer. For example, DDR3-1066 has a peak transfer rate of 8533MBps, yet its industry name is just PC3-8500. But as mentioned before, faster isn't always better when it comes to PC memory. In simple terms, the clock speed can be described as how fast the memory can perform a task. However, there's also CAS latency (Column Access Strobe) which is how long it takes for the memory to go from one task to another. This means that sometimes, even a high-speed SDRAM with a high CAS latency can be trumped by a slower SDRAM with a lower CAS latency. Current DDR3s have relatively higher latencies (7-9) compared to DDR2s (4-6) but this is because the latter has had time to mature.

Memory Kits

 

While using one SDRAM may be sufficient for most applications, memory-intensive programs such as games will require more than one. This is where adapting a dual- or even triple-channel architecture becomes handy. You may compare it to having two or three roads leading to the same location instead of just one. More roads will mean less traffic congestion and therefore, faster travel. However, some using the multiple-channels will you require you to buy SDRAMs with identical specs, otherwise, the faster one will have to slow down to match the other SDRAM's speed - that is, if your motherboard will allow the use of mismatched SDRAMs, at all.

Newest Products

  • Corsair DOMINATOR PLATINUM RGB 32GB (4 x 8GB) DDR4 DRAM 3200MHz C16 Memory Kit CMT32GX4M4Z3200C16
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  • G.Skill Trident Z RGB (For AMD) DDR4 32GB (8GBx4) 3200Mhz F4-3200C16Q-32GTZRX
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  • G.Skill Trident Z RGB (For AMD) DDR4 16GB (8GBx2) 3200Mhz F4-3200C14D-16GTZRX
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  • Kingston HyperX FURY 32GB (2x16GB) DDR4 2666MHz HX426C16FRK2/32
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  • Kingston HyperX FURY 16GB (2x8GB) DDR4 3200MHz HX432C18FB2K2/16
    $123.89
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  • Kingston HyperX FURY 8GB (1x8GB) DDR4 2666MHz HX426C16FR2/8
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