Archived from groups: alt.comp.hardware.overclocking.amd,comp.sys.ibm.pc.hardware.chips,uk.comp.homebuilt,alt.comp.hardware,alt.comp.hardware.pc-homebuilt (
More info?)
Since the Athlon XP chips may start disappearing pretty soon, this might
not be an issue for very long.
Michael Brown wrote:
> Lachoneus wrote:
> >> If the Sempron 2600+ at £64 is the equivalent power of the Athlon
> >> 2200+ (see earlier this thread) which is £50 then the Sempron is 28
> >> percent more expensive.
> >
> > Keep in mind, though, that the Sempron 2600+ is on a 333MHz FSB,
> > whereas the Athlon 2200+ is on a 266MHz FSB. That doesn't give it
> > quite enough of a boost to justify its higher price, but the
> > real-world PR rating difference is probably closer to 300 than 400.
>
> FWIW, the slowest 256KB L2, 166MHz FSB Athlon XP was the 2600 at 2083MHz.
> The highest Sempron (absolutely identical to the 256KB L2, 166MHz Athlon
> XPs), the 2800, has a speed of 2000MHz, which pretty much exactly equates to
> a 2500 (if it esisted with the 256/166 spec) under the old scheme. So in
> this particular case the rating on the Sempron is very close to 300 points
> too high.
>
> At the lower end, we have the Sempron 2200 at 1500MHz. 1500MHz would put you
> at an 1800 rating with a 256/100 config, ~1750 (yeah, it's backwards) with a
> 256/133 config, ~1950 with a 512/100 config, and ~1950 with a 512/133
> config. So it looks as though at this speed, AMD thinks that the bus speed
> has very little impact on the performance of the CPU, so a 256/166 part at
> 1500MHz would be somewhere around 1850 rating or so at the most. This means
> the Sempron is overrated by about 350 points. Now, there is some variation
> at each speed, due to the requirements that the speed must be a half-integer
> multiple of the bus speed (hence why the 133MHz FSB part is "slower" than
> the 100MHz FSB part at 1500MHz). However, I would say that overall, the
> Sempron is over-rated by something in the range of 300 to 350 points.
>
> As for the prices in New Zealand (in order from cheapest to most expensive,
> skipping those where the lower rated part is more expensive, and including
> the two closest-in-price Athlon XP chips):
>
> Sempron 2400+: $106
> XP 2000+: $100
> XP 2200+: $116
> Should be XP 2100+ at ~$108 (-2%)
>
> Sempron 2500+: $124
> XP 2200+: $116
> XP 2400+: $133
> Should be XP 2200+ at $116 (+7%)
>
> Sempron 2600+: $145
> XP 2400+: $133
> XP 2500+: $148
> Should be XP 2300+ at ~$125 (+16%)
>
> Sempron 2800+: $187
> XP 2600+: $155
> XP 2700+: $190
> Should be XP 2500+ at $148 (+26%)
>
> So, the Sempron 2400+ is priced "about right". However, the 2500, 2600, and
> 2800 Semprons are clearly overpriced, coming close to the price of an Athlon
> XP with a 100 point lower rating.
>
> --
> Michael Brown
> www.emboss.co.nz : OOS/RSI software and more
> Add michael@ to emboss.co.nz - My inbox is always open