iXBT Labs - Computer Hardware in Detail






ECS U-Buddie barebone for an Office Computer

October 13, 2004

It's no secret that the main obstacle on the way of barebones to the desks of users is their price. It's quite easy to picture a computer fan who is constantly updating his/her home computer, where one of the modern minicomputers will be a fair startup option. You can imagine an effective looking barebone on a desk of a director general (or his/her secretary). But it's hard to imagine such computers becoming popular on work places in offices, even for managers communicating with clients.

Today we are presenting one of the U-Buddie barebones from ECS. It's not a new model, but it does not claim the place of the most stylish novelty of the season – it's potentially a computer for work. Relatively inexpensive (details in the end of the article) and good. To find out how good is the point of our review.


Remember, we already reviewed one barebone from ECS – EZ-Buddie. This time the model is more out of standard and quite tinier.

The system case is of the desktop format, but its dimensions are speaking for themselves: 230x232 mm at the height of just 75 mm. Each of the sizes separately beats no records, while the volume of the system case is actually almost 3 times as small in comparison with the standard Shuttle XPC "brick". Note that you can also put the U-Buddie vertically – the bundle contains a special "foot" for this purpose. The case is made of aluminium, vent holes are made on one of the sides and on the rear panel. The front panel is made of plastic.

The front panel is of austere design, the set of ports is minimal (1 USB 2.0 + 2 Audio), though there is a reset button supplementing the power button. Pay attention to the slot for a CD/DVD drive – U-Buddie obviously supports only notebook models of the slim type. Running a few steps forward, a hard disk for this barebone must also be a 2.5-inch notebook one.


The use of a slim drive ensures that the system can work in vertical position – discs are held in place by the hole in the middle.

As any other miniature model, it cannot accommodate a power supply unit inside because of dimensions and its negative effect on the temperature conditions. In this case an external 78W power supply unit without active cooling from Lite-On is used. A power connector for this power supply unit can be seen on the left in the photo of the rear panel. A set of connectors on the rear panel is absolutely standard: 2 x PS/2, 1 x LPT, 1 x COM, a VGA port, 4 x USB, 100-Mbit LAN port, and 3 x audio-outs. You can see two phone jacks of the additional modem on top and a bracketed slot of a low-profile expansion card on the right.

Interior arrangement and functionality

To remove the lid together with the front panel attached to it, unscrew the two screws on the rear panel. As usual, you have to get prepared for the worst, because the lack of extra space turns the innards of the barebone into a mess of cards and cables. At least, at first sight.


The disk storage devices will be accessible right after the lid is removed: the optical drive is mounted horizontally, as we have already seen, on a special additional system case support. The hard disk is installed vertically, it is mounted by two screws to the support, which you can see on the right photo, close to the case wall. Note that both notebook storage devices use a special connector (adapters are included into the bundle) and the power connector is not standard either (the bundle includes a power adapter for a hard disk and a CD/DVD drive is powered from the FDD cable).


Of course it's silly to speak about the convenience of laying cables in this tiny system case, especially when you install an expansion card into the PCI slot. The situation is even worse with the connectors for the cables to the front panel being located on the mainboard closer to the rear panel. So, you have to accept that when you need to upgrade the system configuration, you'll have to remove the main internal modules and then thoroughly lay the cables once again. On the other hand, in case of office usage of U-Buddie, its upgrade urgency will be minimal.


However, to reach a memory module (the mainboard contains only one DIMM slot), you only have to remove the CD/DVD drive cage. Unfortunately, the CPU cooler partially overhangs the IDE slots, so to access them you'll have to unmount the cooler. An optional card of the MC'97-modem (56K) is mounted on the rear panel of the system case, which contributes to the cable mess.

On the left there is a power converter board mounted vertically, which has all necessary power connectors (including an additional 4-pin power connector for +12 V), but nothing more. However, the only (merely physical) opportunity to expand the system functionality is to use a low-profile PCI-card, and such models do not require additional power supply (at least I don't know about such cases).

You could have already formed a picture of the functionality provided by the mainboard, which is the base of this barebone, by its connectors. Note that there are several models in the U-Buddie series with three main variations – for Celeron/Pentium 4 (Socket 478), for Duron/Athlon XP (Socket A), and for C3/Celeron/Pentium III (Socket 370). In two latter cases the mainboards come shipped with CPUs already soldered in, which reduces the price of the end solution as well as its attraction for some groups of users. Our sample modification is 4m23 with "free" Socket 478, which mainboard (ECS ES4M) is based on the chipset combination SiS650GL+SiS962L. Of course, you cannot install a top Pentium 4 processor on this mainboard, but is it really necessary to all users? The chipset supports the 533 MHz FSB frequency, though unofficially, so U-Buddie 4m23 is claimed to support processors up to Pentium 4 2.66 GHz (except for those based on Prescott core). Frequency constraint is obviously dictated by the capacity of the external power supply unit as well as by the care about the thermal conditions in the system.

These are the mainboard characteristics defined by the chipset: support for Intel Pentium 4/Celeron processors with the FSB of up to 533 MHz (with the clock frequency less than 2.66 GHz), up to 512 MB DDR200/266 (one module), integrated video core of the SiS315 chipset, 2 UATA133 channels for 4 devices, 6 USB 2.0 ports (5 laid out ones), 10/100 Mbit/sec Fast Ethernet (the PCB incorporates the Realtek RTL8201BL PHY-controller) and 4-channel audio (AC'97 C-Media CMI9738 codec). Note that some U-Buddie models may use the SiS962 southbridge with FireWire support – in this case one connector is placed on the slightly modified front panel, and the other one - on the rear panel, where the corresponding hole is bracketed in our model. There are no overclocking options in ES4M – in BIOS Setup you can only select frequencies (100/133 MHz) and memory timings (extremely poor range), as well as the FSB frequency – 100/133 MHz.

We've been steadily getting improbably bad results in our audio quality tests of the integrated audio solution, so we publish our results as they are – unfortunately we had no time to correct the mistake (if it is really our mistake). The integrated audio quality was tested in 16bit, 44 kHz using the RightMark Audio Analyzer 5.2 test application and the Terratec DMX 6fire sound card:

FR passband ripple (from 40 Hz to 15 kHz), dB:
+0.15, -1.37
Noise level, dB (A):
Dynamic range, dB (A):
THD, %:
Intermodulation distortions, %:
Channel crosstalk, dB:
Very bad

General performance: Average (details).

Cooling system and temperature conditions

Our U-Buddie model comes shipped with an external power supply unit, which capacity is just 78 W. However, taking into account the CPU restraint, usage of notebook storage devices, and the impossibility to use a state-of-the-art video accelerator, this power limit seems quite reasonable. We had no problems with that during our tests. The problem of the cooling system noise goes the next in importance for many users. In this case the cooling system consists of one rather simple cooler with an air pipe.

The base of the cooler is a regular aluminium heatsink with thick straight fins, which is fixed by the screws through the holes in the mainboard to the lugs on the bottom of the PC case. The heatsink is covered with metal housing. After the cooler is installed, the housing beds the side of the case, right opposite to the air grating. Turbine blower with straight blades is located on the opposite side of the construction. It takes the air from both open ends (top and bottom) and forces it through the air pipe on the heatsink. In standby mode the fan speed is 2650 rpm, and though the noise was audible, it was intrusive neither in tone nor in loudness. It can be subjectively evaluated as "rather quiet". But at full system load the fan speed increases to 4000 rpm, and this is "loud" already, it's not very comfortable to work in this noise. It should be mentioned that the automatic fan speed control is carried out by the proprietary Fan SmartGuardian (it can be enabled in BIOS, it reacts to the CPU temperature).

For comparison purposes we took a recently reviewed barebone ASUS DiGiMatrix and test results of several barebones, which we tested over a year ago. All the systems used the same Pentium 4 2.53 GHz processor, and they all used their integrated video. As a result you can see how the cooling systems of these models coped with maximum possible heat load (the CPU frequency is limited, the external video card cannot be used in the majority of these systems).

U-Buddie cooler cannot boast of remarkable efficiency (it would have been strange, taking into account its performance attributes), but it does its bit keeping the processor far from the thermal deceleration border (71°C for this Pentium 4 model).

System cooling on the whole is still better – in case of full CPU load, U-Buddie is outscored only by the AOpen barebone with a powerful cooler designed for high end desktop systems. Temperature of the CPU voltage converter also remains within normal limits (up to 55°C), and the hard disk with its 38-39°C can be considered cool (this is in fact a merit of the miniature hard disk with low rotational speed). As you can see, the use of Fan SmartGuardian is quite justified.

Bundle and brief specification of the barebone

The bundle of U-Buddie can be called standard, "bare necessities". The only item worthy of attention is a set of replaceable faceplates for the front panel (they are installed under the upper plexiglass cover), but they look so childish that we refuse to consider them a real bonus.

As an option the company and its distributors offer the installation of an optical drive and a hard disk, as well as a wireless set of input devices (there is a special connector on the mainboard for the latter). Our model also came shipped with an optional all-in-one card reader (CF/SM/SD/MS), but the USB controller of the first version completely ruins the allure of this model for customers. However, if the operating speed is not important and the extra charge for this option is not too high, some customers may be tempted.

In conclusion we provide a brief specification of the barebone, which comes shipped in a nice cardboard box with a handle.

  • Bundle: system case, a foot to put the case vertically, external power supply unit, mainboard, modem card and a phone cord (optional), slim optical drive and a 2.5" hard disk (optional), external all-in-one USB 1.1 card reader (optional), CPU cooler, CD, manuals, 2 ATA66 cables, power cables and adapters for miniature disk storage devices, power cable for the kit, a set of faceplates for the front panel
  • PC case format: slim desktop with an option to put it vertically
  • PC case dimensions (WxDxH) in horizontal position: 230(244 with a foot)x232x75 mm
  • Bays: 1 x external 5.25" for slim drives
  • External power supply unit: Lite-On, 78 W
  • Mainboard, chipset: ECS ES4M, SiS650GL+SiS962L
  • Video: integrated video SiS650GL (SiS315)
  • Audio: 4-channel AC'97 C-Media CMI9738 codec
  • Network: 10/100 Mbit/sec Fast Ethernet (Realtek RTL8201BL PHY controller)
  • Expansion slots: 1 PCI (for low-profile cards)
  • Front panel connectors: 2 x Audio (microphone/headphones), 1 x USB (2.0)
  • Back panel connectors: 2 x PS/2, 1 x COM, 1 x LPT, 1 x VGA, 4 USB (2.0), 1 x LAN, 3 x Audio
  • BIOS capacities for finetuning/overclocking: memory timings, FSB/Memory frequency

Performance tests

Testbed configuration:

  • CPU: Intel Pentium 4 2.53 GHz, Socket 478
  • Mainboards:
    • ECS ES4M based on SiS650GL as part of ECS U-Buddie 4m23
    • ASUS P4SQ based on SiS651 as part of ASUS DiGiMatrix
    • ASUS P4S333-VF based on SiS651 as part of ASUS Prodigy (P4S)
    • AOpen MX4GR based on i845G as part of AOpen MX4GR
    • Shuttle FB51 based on i845G as part of Shuttle SB51G

  • Memory:
    • 1x512 MB PC3200(DDR400) DDR SDRAM DIMM TwinMOS, CL 2 (in tests it was used as PC2100(DDR266) for ECS U-Buddie and as PC2700(DDR333) for ASUS DiGiMatrix)
    • 2x256 MB PC3200(DDR400) DDR SDRAM DIMM Winbond, CL 2 (in tests it was used as PC2100(DDR266) for other barebones)

  • External video card: not used
  • HDD:
    • Seagate Momentus ST94011A, 5400 rpm (for ECS U-Buddie)
    • IBM IC35L040AVER07-0 and Western Digital WD400EB, 7200 rpm both (for other barebones)


  • OS and drivers:
    • Windows XP Professional SP1
    • DirectX 9.0b (for ASUS DiGiMatrix and ECS U-Buddie)
    • DirectX 8.1 (for other barebones)
    • SIS AGP Driver 1.17 (for ASUS DiGiMatrix and ECS U-Buddie)
    • SiS AGP Driver 1.13 (for ASUS Prodigy)
    • SIS IDE Driver 2.04a (for ASUS DiGiMatrix and ECS U-Buddie)
    • SiS IDE Driver 2.02 (for ASUS Prodigy)
    • SIS VGA Driver 2.21 (for ASUS DiGiMatrix and ECS U-Buddie)
    • SiS Video Driver 2.07 (for ASUS Prodigy)
    • Intel Chipset Software Installation Utility 4.10.1012
    • Intel Application Accelerator 2.3
    • Intel Extreme Graphics Driver PV11.4.1
    • AD1980 Driver dated 07.05.2003
    • C-Media CMI9738 UDA039

  • Test applications:
    • Gray Matter Studios & Nerve Software Return to Castle Wolfenstein v1.1
    • Croteam/GodGames Serious Sam: The Second Encounter v1.07

As we used the results of the above-mentioned systems (including ASUS DiGiMatrix) to compare with U-Buddie, we decided to content ourselves with the same tests in games. We certainly used the integrated video in all cases, because an external video card can be installed only to Shuttle SB51G. Performance of all reviewed systems based on SiS650/651 turned out the same (accurate within 3%). You can find the comparison of those SiS chipsets with their competitors in archives of our web site.

We can tell the same about U-Buddie what we already wrote about DiGiMatrix: with new drivers the performance in games raised considerably (you can compare with Prodigy), but there appeared problems with maximum graphics settings. However, the absolute fps values are still far from optimistic: you can play only in low game modes.

In newer games the situation is even worse, and the 640x480 mode cannot be seriously reviewed in 2004. Nevertheless, note that ECS U-Buddie squeezes everything possible from its integrated video, even outscoring the ASUS model.


The barebone under review allows to assemble a moderately fast (for these days, not among its classmates) computer of decent design and satisfactory noise characteristics. If you don't require too much from the functionality of this system, U-Buddie will not disappoint you. Perhaps the worst disadvantage of this reasonably priced minicomputer is the price for its component parts. Prices for slim optical drives and 2.5-inch hard disks are unfortunately not so low. However, a CD-ROM drive (instead of a combo-drive) and a hard disk with a moderate capacity are quite affordable, and it's quite enough for an office computer.

We wouldn't recommend this system to an average home user, if he/she has no idea of his/her needs for two or three years in advance (replacing this computer earlier is simply a waste of money). In practice, almost all users will require expansion capacities sooner or later, and though 5 PCI slots are not necessary for the majority of users, they will still want a couple of new features. Not all devices can be connected externally to a USB port. Besides, there are not too many available USB ports. On the other hand, one expansion slot for an office computer is quite enough, its functions being known for sure for the entire period of its service. The conclusion about the future of U-Buddie on the market seems to suggest itself.

In conclusion we'll publish a short list of the most typical pros and cons of the barebone under review.


  • Miniature dimensions
  • Support for USB 2.0 (though only 5 ports)
  • All necessary cables and adapters are included into the bundle
  • Good CPU cooler shipped in the bundle
  • Low noise level of the system (especially with enabled Fan SmartGuardian)
  • Low price for this barebone in comparison with its competitors


  • Plain design
  • Complicated assembling/disassembling
  • Average (for these days) functionality level
  • Expansion capacities are limited to a single low-profile PCI card
  • Only one memory slot
  • Support for processors is limited on the upper level
  • Evidently weak gaming capacity of the integrated video
  • Lack of TV-out, S/PDIF connectors, 6-channel audio, and other attributes necessary for a stand alone media center
  • (?) Complete lack of overclocking options
  • Highly priced components

This model on the official site of the manufacturer.

Sergei Pikalov (peek@ixbt.com)
Dmitry Majorov (destrax@ixbt.com)
September 13, 2004

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