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AMD AthlonXP 2700+ 333 MHz FSB Processor Review
AMD AthlonXP 2700+ 333 MHz FSB Processor Review - PCSTATS
Today, AMD is releasing the new AthlonXP 2700+ at 2.17GHz, and AthlonXP 2800+ processor at 2.25GHz.
 92% Rating:   
Filed under: CPU / Processors Published:  Author: 
External Mfg. Website: AMD Oct 01 2002   C. Sun  
Home > Reviews > CPU / Processors > AMD AthlonXP 2700+

Overclocking the AthlonXP 2700+

The AthlonXP 2700+ is multiplier locked by default even though all the L1 bridges on the PCB are connected. I would have unlocked the processor via the last L3 bridge but I didn't have any conductive paint left in the lab, so we'll come back to that in few days.

The only way to overclock a locked processor is through the FSB and please remember that we're already starting at 166 MHz. The XP 2700+ uses the same AIUAB we found on the XP 2400+ we tested earlier but hopefully we'll be able to squeeze a bit more out of the XP 2700+ then we did the XP 2400+which topped off at 2.25 GHz .

The last letter of the first line signifies the FSB. A=100 MHz, C=133 MHz, D= 166 MHz

One thing I've noticed after playing with a few Thoroughbred processors is that overclocking is a much wilder ride. What I mean is that it's much harder to find the absolute maximum speed and keep 100% stability at the same time.

For instance, it's possible to overclock a Thoroughbred processor to a high value (say 2.4GHz) and at that speed it will run 3DMark, Quake III, Sandra and even SysMark perfectly, but crash in POVRay.

Keeping that in mind, it was a bit frustrating finding the true overclocking potential of the AthlonXP 2700+ we tested (which was incidently pre-production silicon).

After a few tries, we found a few sweet spots, and this time around I was a patient overclocker. I increased the FSB slowly about 3-4 MHz at a time and ultimately hit the first snag at 173 MHz FSB. I increased the VCore from 1.65v to 1.75v to stabilize the processor and then continued upward.

We began to encounter a few more overclocking bumps almost immediately once the processor hit 180 MHz FSB. To stabilize things this time I increased the Vcore to 1.85V! Stability looked good after this, and to my surprise, the system would complete a full run of 3DMark, Quake III and Sandra at 190 MHz FSB (which would give me a CPU speed of 2.47 GHz). For some reason, the AthlonXP 2700+ we tested would always fail SuperPi whenever it was pushed above 185MHz FSB - no matter what the voltage to the core.

In the end I settled with a stable 185 MHz FSB which gave us a maximum clock speed of 2.4GHz - still pretty impressive.

I have never seen these peculiar overclocking traits with any other processors we've tested from the Thunderbird Athlon's to Palomino's or even the Pentium 4, just with the Thoroughbred. Weird.

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Contents of Article: AMD AthlonXP 2700+
 Pg 1.  AMD AthlonXP 2700+ 333 MHz FSB Processor Review
 Pg 2.  — Overclocking the AthlonXP 2700+
 Pg 3.  Benchmarks: Bapco Sysmark 2002
 Pg 4.  Benchmarks: Winstone 2001
 Pg 5.  Benchmarks: Winstone 2002
 Pg 6.  Benchmarks: SpecviewPerf 6.1.2
 Pg 7.  Benchmarks: SuperPI, Sandra 2002
 Pg 8.  Benchmarks: PCmark 2002, 3Dmark2001SE
 Pg 9.  Benchmarks: QIII Arena
 Pg 10.  Final Conclusions

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