AVC #112C83

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OEM Socket A heatsink for “normal” cooling – Joe

SUMMARY: OEM Heatsink, OEM performance.

AVC Part #112C83

The good folks at AVC were nice enough to send a sample of their OEM heatsink, the AVC Part #112C83 (note: The link shows a 15mm fan). This is listed as an OEM heatsink – basically, a price item.

The fan is an AVC #F6010B12HS – a 60 x 11 mm unit rated at 18.5 cfm @ 4500 rpm. I found it to be tolerably quiet – I measured its noise at 56 dBA with a Radio Shack sound meter 8″ from the fan’s intake, substantially less than a Delta 38 (about 69 dBA). It’s also safe to use a motherboard fan header – rated at 2.3 watts.

The copper plug is well finished:

Base

When I ran my nail over it, I could not feel or hear any ridges. The clip is a good one – engages all three socket lugs – although considering it’s a light-weight heatsink, it borders on overkill. However, I’m sure you could drop a PC off a building with this heatsink and it would not come off. You must use a screwdriver to mount it.

In summary, a aluminum heatsink with a copper plug insert with a very secure clip – low noise.

THE TEST

The AVC #112C83 was first tested on the CPU Die Simulator which gives results that are unaffected by motherboard influences. I then tested it on a Shuttle AK31, modified to read AMD’s on-die diode, as an example of what users might see on their systems.

TEST RESULTS – CPU Simulator

Heatsink
Die Temp
Ambient Temp
Delta
C/W
AVC #112C83
50.4 C
21.7 C
28.7 C
0.42

TEST RESULTS – Motherboard
CPU/Motherboard

CPU Die Temp

Ambient Temp

Delta

C/W

CPU MBM Temp¹

XP @ 1333, Shuttle AK31

49.4 C

26.7 C

22.7

0.38

41 C

¹In socket thermistor temp.

Delta = CPU temp – Ambient Temp
C/W = Delta / CPU Watts

Interpreting C/W: For every watt (CPUw) that the CPU
consumes, the HSF will limit the CPU’s temperature rise to (C/W x CPUw)
plus the temperature at the HSF’s fan inlet. For example, at an ambient temp of 25 C, a C/W of 0.25 with a CPU radiating 50 watts means that CPU temp will increase 50 x 0.25 = 12.5 C over ambient temp, or 37.5 C. The lower the C/W, the better.

Die Simulator results place the AVC in the lower ranks of heatsinks (Heatsink Ranking).

CONCLUSIONS

About what you’d expect – maybe OK for mom, or maybe grandma.

Thanks again to AVC for sending this our way.

Email Joe

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