Duron 650 Overclocking Results

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SUMMARY: The flexibility of settings FSBs and multipliers gives the Duron some added performance benefits.

As I continue to play with the Duron 650/Asus A7V, I see some value in having the flexibility to vary both the CPU’s multiplier and FSBs. For example, it looks like the stable best I can do with this CPU is 927 MHz (water cooling). Now I can get 927 two ways – 9 x 103 and 8.5 x 109 with the following performance differences:

Benchmark

9 x 103

8.5 x 109

% Diff

Si Sandra CPU/FPU

2591/1292

2595/1292

0.2/NA

Si Sandra Mult Med

3159/4332

3159/4330

NA/NA

Si Sandra Memory

444/548

466/581

4.9/6.0%

3DMark 2000

7399

7532

1.8%

Quake

127.7/123.1

131.4/127.2

2.9/3.3%

Content Creation

33.9

34.2

0.9%

Pi Solver

846

818

3.3%

Duron 650, ASUS A7V, Leadtek GTS2, 128 MB HSDRAM, Monitor @ 800 x 600.

The difference in FSBs of 5.8% translates into 5-6% higher Si Sandra Memory scores – basically a 1-1 benefit. What is interesting is the relatively uneven impact it has on performance; it ranges from about 3% in Quake’s frame rates to less than 1% in Winstone Content Creation – I would have expected more improvement in this app-intensive benchmark.

Kevin Tam sent me a new (to me) benchmark – Pi Solver. What this does is stress the CPU by finding “X” places of Pi – up to 32 million. What’s nice about this one is it not only stresses the CPU but records how many seconds it takes to get “X” places. In this instance, for 4 million places, at 8.5 x 109 it took 818 seconds – 3.3% better than at 9 x 103 (Note: 32 million places @ 927 took 4 hours, 5 minutes and 19 seconds).

The bottom line is that memory intensive apps, like image or sound editing, will show a performance improvement without any penalties (assuming your peripherals like the higher FSB).

Just for giggles, I also benched the Duron 650 with W98SE and W2000 @ 800 MHz with the following results:

Benchmark

W98 SE

W 2000

% Diff

Si Sandra CPU/FPU

2256/1125

2248/1125

-0.4/NA

Si Sandra Mult Med

2750/3771

2684/3441

-2.4/-2.8%

Si Sandra Memory

436/537

446/522

2.2/-2.8%

3DMark 2000

6908

2971

-57.0%

Quake

117.7/113.9

96.8/90.1

-17.8/-20.9%

Content Creation

32.2

42.7

32.6%

Duron 650, ASUS A7V, Leadtek GTS2, 128 MB HSDRAM, Monitor @ 800 x 600.

Let’s chalk up the gaming gaps to “immature video drivers” and leave it at that. However, the Content Creation scores are a shocker – no doubt NT is “industrial grade”, but by this much?? We have seen similar results with the T-bird, so we will be doing more testing on this issue.

At this juncture, I am pleased with running a Duron 650 at what appears to be a stable 927 MHz (1.85 v) – a 50% overclock. I am going to set this up as one of my main systems, continue to use it in everyday apps and see how it behaves.

Email Joe


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