AVC Tundra 2

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An OK heatsink for “normal” cooling – Joe

SUMMARY: An OK cooler for non-aggressive cooling.

Tundra 2

Size: 70 x 63.5 x 37 mm; Fan: 34 cfm @ 3800 rpm.

The kind folks at AVC were nice enough to send a sample of their latest heatsink, the AVC Tundra 2. This is a copper skived unit with a 70 mm AVC fan featuring transparent hub and blades. The fan blades (9) feature an angled tip:

Blade

It’s an effort to prevent the formation of tip vortex as a means to reduce noise.

The fan is an AVC Model #F7015R12UY – a 70 x 15mm unit rated at 34 cfm @ 3800 rpm. I found it to be tolerably quiet – I measured its noise at 63 dBA (4348 rpm) 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.

The fan sits on four legs and is raised above the heatsink – another effort to reduce noise.

The base is well finished but not highly polished:

Base

The clip is a good one – it engages one lug on each side of the socket and can be mounted by hand – no screwdriver required.

In summary, a copper skived heatsink with a very easy to use, secure clip.

PS: Included with the Tundra 2 is this magnet:

???

You can use it to hang something on your refrigerator; under NO circumstances use it around your PC – the magnet is a good one and can probably wipe a drive if it gets close enough.

THE TEST

The Tundra 2 was first tested on the CPU Die Simulator which gives results that are unaffected by motherboard influences. I then tested it on an Iwill KK266+, 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
Tundra 2
53.9 C
24.5 C
29.4 C
0.39

TEST RESULTS – Motherboard
CPU/Motherboard

CPU Die Temp

Ambient Temp

Delta

C/W

CPU Back Temp

Palomino 1200, Iwill KK266+

40.2 C

25.9 C

14.3

0.26

41.6 C

In-socket thermistor per MBM: 33 C

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 Tundra 2 in the mid rank of heatsinks (Heatsink Ranking). With the more tolerable YS Tech, the Tundra 2 ranks among the best of heatsinks tested.

CONCLUSIONS

The AVC Tundra 2 is an OK cooler for non-aggressive cooling. The magnet is a good one, but keep it away from your PC.

Thanks again to AVC for sending this our way.

Email Joe

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