Silent PC Review is passionate about ergonomic spaces for people and finding creative, practical solutions to silencing all kinds of IT machines. We provide detailed reviews and ground-breaking knowhow about the acoustics of computers and components, as well as their energy efficiency and thermal performance.

Calibrate Your CPU Temp Reporting

Cooling
Intelligent thermal management is the key to silent computing, but CPU temperature reporting mechanisms in current processors and motherboards are inaccurate, with results that can vary by 10°C or more. The causes of the inaccuracies are complex, but correcting them to a more reasonable margin of error is not terribly difficult. Russ shows you how.

AMD A64 90nm power consumption measured

The Tech Report gives us a quick comparison of power consumption between a new 90nm core A64-3500+ against a current 130nm version and a P4 Prescott 90nm at 3.4GHz.. The quick & dirty: "Our die-shrunk Athlon 64 came out looking pretty darned good." Under load on three different apps, the total system AC power draw ranged 146W~151W for the 90nm core vs 175~179W for the 130nm core. 19-28W in AC is a very sizeable difference, suggesting at least 12~19W less power draw between the CPUs. These numbers translate to cooler measured CPU temps as well. The P4-3.4 is not even in the running, efficiency-wise, with total system AC power draw at 23-236W.

Archive: SPCR's Test / Sound Lab: A Short Tour

Reference|Recommended | The Silent Front
Sometimes it is still a rat's nest of equipment, computers, components, wires and other assorted geeky things that my home office was before the launch of SPCR. But 30 months later, the SPCR lab has taken over the downstairs kitchen and half of the adjoining TV/den. A lot of equipment, instrumentation and plain old stuff has been acquired. The most recent additions to the lab include various audio equipment acquired for the purpose of making sound recordings of computers and components. Here's a short tour through the SPCR lab.

Nexus PFT-3600 P4 Cooler

Cooling
The PFT-3600 is a P4 Cooler with a 70mm fan skivved from a single piece of aluminum. Compact, light and easy to install, it is from Nexus, one of quiet computing's few truly well-established brands. Read the Nexus PFT-3600 review here.

Antec Phantom 350: Super-efficient Fanless PSU

Power
Click here for the Antec Phantom 350 review. The Antec Phantom fanless PSU was rumoured about almost a year ago. It's finally been released. Its big claim to fame? Extremely high efficiency. Higher than any other PSU tested by SPCR -- by no small margin. Click here for the Antec Phantom 350 review.

Scythe NCU-2000 Fanless CPU Cooler

Cooling
Scythe continues its tradition of unusual innovation in silent computing components. The NCU-2000 is an update of a HS designed to run completely fanless. This huge model uses flat heatpipes, widely spaced thin fins and a copper base that can rotate so the fins are correctly oriented regardless of CPU socket orientation on socket 478 or A64. Yet it's just 505 grams, a hundred grams lighter than the original NCU-1000; is it better?

Thermalright XP-120: 1st 120mm fan CPU heatsink

Cooling
With Intel CPUs far exceeding the 100W mark, you knew it was going to come to this, sooner or later: A massive heatsink designed to work with a 120mm fan for a new level of cooling. Thermalright is the first out of the gate with their XP120. Thin aluminum fins, a very large radiant surface, copper base and heatpipes. Simply put: Its performance sweeps aside every other HS.

SilverStone ST30NF Fanless ATX12V PSU

Power
The SilverStone ST30NF is probably the most sophisticated fanless PSU we've examined thus far. It weighs 6 lbs, uses a heatpipe cooling system, has twin LEDs for operational and temperature status, Active PFC, and even looks really slick. Rated at just 250W (for 120VAC input) but priced at US$159. Hmmm...

Apple iMac G5: Super Small & Very Quiet

Apple's new iMac G5 unveiled today is built into the back of 17" and 20" LCD monitors just 2" and 2.2" in depth and feature a 1.6 or 1.8 GHz G5 processor. Although Apple have not claimed this, it qualifies for the world's smallest desktop computer: The PC portion of the iMac has no footprint to speak of, and the monitor is only marginally deeper than some LCD monitors. The iMac G5 is considerably smaller and sleeker than similar LCD monitor + computer integrations from the PC world. The features and connectivity offered compete well with the very best SFF PCs offer.

All of this would be moot for SPCR if it was noisy, but Apple claims to have paid close attention to acoustics once again:

"The speaker grill [at the bottom edge of the monitor/pc] lets a trio of ultra-quiet blowers draw cool air into the system. These custom heat dissipaters can rotate at speeds as low as a few hundred RPM. Advanced thermal software spins them as fast or slow as needed... the iMac G5 measures less than 25dB when idle (at the same distance of 50cm, a whisper in a quiet room measures more than 30dB). A slit in the back of the case allows heat to rise out the top."

If true, this is quieter than any SFF PC except fanless units such as those from Hush, NiveusMedia, etc. The iMac G5 seems like a clever adaptation and application of notebook technology; surely PC makers could do similar? Now for a review sample. .. Discuss this news in the SPCR forum.

X-bit Labs examines power consumption of current VGA cards

A follow-up to an earlier piece on ATI cards' power consumption, this new X-bit Labs article examines current nVidia cards and compares them with ATI cards for power consumption. Detailed analysis of heat sources in a PC is of interest to anyone concerned about thermal and noise management, which is at the core of silent computing. Actually measuring VGA cards' power is a challenge that few web sites have attempted in the past. Definitely worth a read.

CoolerMaster Vortex Dream Heatsink/Fan

Cooling
The CoolerMaster Vortex Dream is a new heatsink/fan by that offers many high-end features at a budget US$22 MRSP. All-copper one-piece skivved design, cross-platform (P4/A64) compatibility, and an integrated 70mm fan with built-in manual speed control. It's a lot for the money. We hustled the Vortex Dream to the SPCR heatsink torture test chamber to bring you the real goods.

New Arctic Cooling VGA coolers at InsaneTek

Internet News

A new site called InsaneTek has just posted a review of the entire line of new VGA coolers from Arctic Cooling. As regular visitors are probably aware, Arctic Cooling's VGA Silencer is strongly recommended by SPCR. Its prime innovations are a big waterwheel style fan combined with a large cooling fins and a design that pushes the hot air from the VGA card out of the case instead of spewing it all around the case. It is not too noisy at standard speed and has a switch to slow the fan to a whisper quiet mode. The downside is that the original fits only certain models of the ATI 9000 series and nVidia GF3s.

The new AC VGA cooler line maintains the same key features in a somewhat more streamlined design, adds clever cooling for the VGA RAM, uses copper in many models, and is divided into two series: NV silencer 1 through 5, and ATI Silencer, 1 through 4. The nine models cover just about every current mainstream VGA card. One change is that most models now feature temperature control for the fan with different top speeds for various models. InsaneTek's review is quite good in most ways and surprisingly complete despite its brevity, but does little more than just touch upon the acoustics. Still definitely worth a read.

Silverstone LaScala LC-04 HTPC Case

Cases|Damping
Silverstone's recently released La Scala series SST LC-04 is a slick beautifully styled all-aluminum case that fits a full size ATX motherboard yet has small exterior dimensions, especially the all-mportant (for a HTPC case) height . Is the LC-04 suitable for a quiet HTPC? Read Ralf's review.

Scythe FCS-50 heatsink/fan

Cooling
Heatpipes, dual fan capability, big and tall, blow-across airflow, hypro bearing fan with wide-range speed controller: These are the core features of Scythe's new multi-platform CPU cooler. The FCS-50 features many thin fins, the flat Heatlane heapipe, and some unique design features. It fits well in Scythe's eclectic HS stable. How cool & quiet is it?

Intel's Plans for 478 & T Socket processors

An X-bit Labs article posted last week says Intel will offer 90nm products for socket 478, and also introduce some 130nm (Northwood core) processors for socket 775 (socket-T). To summarize,

For socket 478, well get more high end P4s -- P4EE-3.6 (NW), P4E-3.6 & 3.8 (Prescott), and Celerons (w/256Kb cache) up to 3.46GHz. There's also new slower P4-2.26 & 2.4 (533MHz / 512KB cache Prescott w/o Hyperthreading).

For socket-T, there's low end NW: 2.8C, 3.0C & 3.2C (800MHz / 512Kb cache). And high end NW: P4EE 3.2 & 3.46 (1066MHz / 2Mb cache).

None of these models have been in previous processor roadmaps but were revealed to Intel's partners in an announcement about new packaging for tray processors. Finally, "It is not clear whether the “unexpected” central processing units will be supplied into retail market, or will be available in limited quantities to selected computer makers."

From our PoV, the expansion of "low end" (read: cooler) processors on both 478 and 775 platforms is a good thing, allowing for quieter systems, especially in SFF where the thermal challenges of the Prescott virtually eliminated 775 from the quiet race.