What is the Gigaflop of an AMD athlon XP2000 and 2700?

[nanyangview]

I tried searching everywhere but cannot find the data, maybe some of u guys know the answer. So please help me.
I just wanna see if apple's Dual G4 1.25GHz (18Gigaflops) machine can beat the athlons.

THanks!

 

[Bovinicus]

Look for just about any review on the CPUs. There should be some Sandra benchmarks contained in many of the reviews for these CPUs, which gives a synthetic performance estimate in terms of FLOPS (I might be wrong, but check it out).

 

[nanyangview]

i tried but without avail

 

[Random Variable]

I have no idea about the Athlon XP, but I remember reading recently that the 3.06GHz Pentium 4 has a theoretical peak of 12 GFlops.

 

[Accord99]

4xClockspeed for single precision and integer values, 2xClockspeed for double precision values. Of course, these values and the 18GFlops of the Apple system are theoretical numbers and not achievable in the vast majority of software. However, given the superior design and memory subsystem of a modern Athlon (and P4) system, they usually can come closer to their theoretical limits. And which is why the G4 is completely outclassed in nearly all computationaly intensive applications.

 

[imgod2u]

You should realize that that's the theoretical maximum FP operation rate. Hardly something to compare to Sandra scores.

Anyway, an AthlonXP is capable of:
4 single-precision FP operations per clock
2 double-precision FP operations per clock
Multiply that by whatever clockrate it's at and you've got the theoretical top FP throughput.

It should be noted that Apple's (18 Gflops) number is only when the FMAC instruction is used. Under most circumstances when FMAC is not used, it is half that.

 

[FishTankX]

Okay.

Theoretically the max is 6.6 GFLOPs for a 2000+. That would mean a dual AthlonMP 2000+ would be 13.2 GFLOPs
The theoretical max for the 2700+ is 8.7 GFLOPs. That means that if you managed to get 2 to work in 1 board you would get 17.4 GFLOPs. Within striking distance of the dual 1.25. Unfortunatley it's on a 333 FSB and you won't get the AMD 762 chipset up that high.

There are your numbers. Have fun.

Remember..

Signle G4 1.25 is 9GFLOPS
AthlonXP 2800+ is 9GFLOPS.

Thus they're theoretically equal.

In real world performance, the AthlonXP slaughters the G4. Unless you're running RC5. Then the G4 slaughters the Athlon.

Anyone who buys a dual G4 1.25 machine to get their team higher on the RC5 list is really [ H ]ard Core though. (Not ascosciated with ardOCP. But they're the one of the most hardcore group of guys out there. )

 

[imgod2u]

A little correction. The theoretical max for a 1.25 is 10 Gflops (FMAC) and 5 Gflops without FMAC. Dual would be 20 and 10 respectively. The 18 Gflop number was what Apple managed to reach with their own specialized benchmark (god knows what that is).

 

[FishTankX]

WHOAH! I've never seen a benchmark that managed to make 95% of a CPU's resources. That's scarry!

 

[imgod2u]

When you control the entire system and have teams of engineers that can specifically write software that'll achieve the most outta a platform that you control, it's not all that hard

 

[nanyangview]

guys what is RC5?
So you mean that our lovely athlons still thrash the G4 and so will the Opteron?

 

[Eug]

Originally posted by: nanyangview
guys what is RC5?
So you mean that our lovely athlons still thrash the G4 and so will the Opteron?

For RC5, check out the Distributed Computing forum. The G4 annihilates the Athlon. However, overall the Athlon is much faster for most things.

Furthermore, much software on the Mac side right now isn't truly SMP aware, so while the OS will benefit from dual processors, much of the software won't. Some CPU-intensive apps though will, such as some video encoders, etc.

My 1 GHz G4 Titanium laptop has a theoretical max of 7.5 Gigaflops, ie. faster than an Athlon 2000+, but in real life, it will be slower than the Athlon.

More importantly though, Mac's OS X is awesome. I can sacrifice some speed (esp. in a low power laptop CPU) to be able to use OS X and OS X software. It is unrivalled.

The main problem is that the G4 is essentially at the end of its life. We will have to wait until Q3 2003 for some IBM PPC970 goodness.

 

[microAmp]

Thought I would throw this in.

Ace's Hardware did some benchmarks with these CPU's.

Dual Athlon MP 2200+
Athlon XP 2800+
Pentium 4 3.06 GHz (HT on)
Pentium 4 3.06 GHz (HT off)
Dual P4 Xeon 2.4 GHz
Pentium 4 2.53 GHz
Single P4 Xeon 2.4 GHz
Apple PowerMac G4 Dual 1.25GHz

 

[thorin]

Originally posted by: FishTankX
Okay.
Signle Dual G4 1.25 is 9GFLOPS
AthlonXP 2800+ is 9GFLOPS.

Well which is it single or dual???

Thorin

 

[Eug]

Originally posted by: thorin

Originally posted by: FishTankX

Signle Dual G4 1.25 is 9GFLOPS

Well which is it single or dual???

Single. Like I said earlier, my 1 GHz G4 laptop (single CPU) is 7.5 GFLOPS (on paper).

BTW, the IBM PPC970 will be introduced in the fall hopefully. (They've been pretty good with target dates in the past, or so I've heard.) It will be intro'd at 1.4-1.8 GHz. Guesses are that the 1.8 GHz PPC970 will SPEC out to around the 2.6 - 3.06 GHz P4 level. Who knows how long it will take IBM to come out with a revision to push it past 1.8 GHz though.

 

[element]

Originally posted by: Eug

Originally posted by: thorin

Originally posted by: FishTankX

Signle Dual G4 1.25 is 9GFLOPS

Well which is it single or dual???

Single. Like I said earlier, my 1 GHz G4 laptop (single CPU) is 7.5 GFLOPS (on paper).

BTW, the IBM PPC970 will be introduced in the fall hopefully. (They've been pretty good with target dates in the past, or so I've heard.) It will be intro'd at 1.4-1.8 GHz. Guesses are that the 1.8 GHz PPC970 will SPEC out to around the 2.6 - 3.06 GHz P4 level. Who knows how long it will take IBM to come out with a revision to push it past 1.8 GHz though.

0-60 times? How many Gs cornering ability? How bout the 1/4 mile? I wanna compare it to something along the same lines in price. Yes that's right a car. hee hee hee. Oh come on smile I was just kiddin.

 

[FishTankX]

Oops. heh. Typo fixed.

 

[bfonnes]

Originally posted by: nanyangview
guys what is RC5?
So you mean that our lovely athlons still thrash the G4 and so will the Opteron?

Nothing to get worked up about. No one buys computers just to run an RC5 client. Terrorists or hackers maybe, I don't know.

Bfonnes