Poor memory Scores with Athlon XP and Epox 8Kha+

[Compnerd0977]

I am trying to figure this out. Currently i am getting 900 ALU and 870 FPU. I know the reference board gets 850 and 1000. I am trying to figure out why my FPU scores are so low and my ALU is so high. More importantly why my FPU is so low. I have a XP 1800 with 512 Pc2100 from crucial. Mem settings are at turbo and set to CAS 2.

 

[lane42]

Did you set the 4 way in the Bank interleave.

 

[Compnerd0977]

Yea

 

[Mikewarrior2]

Have you tried updating your Sisoft Sandra? Early XP mem benchmarks were *lower* than Athlon benchmarks, probably due to differences in hardware prefetch, etc.

The updated version puts XP chips a bit higher than Athlon chips.


Mike

 

[Compnerd0977]

Yep I have the newest version

 

[lane42]

This is what ia'm getting on my 8KHA+ and xp 1900 on a 142 fsb

834 ALU
922 FPU

 

[Compnerd0977]

It is just weird since i am getting lower then the reference and lower then most of the tests i have seen.

 

[Compnerd0977]

Does anyone else have scores from this board

 

[Pabster]

The high numbers everyone drooled over on KT266A were only with Thunderbird cores. XP cores do not score nearly as high, partially due to the hardware data prefetching of the Palomino core.

 

[Versus]

Is there a correlation between processor speed and memory performance? Also, do you benchmark on a fresh installation?

 

[LocutusX]

I can tell from the scores you are getting, that you are NOT using the real "latest" version of Sandra.

The real latest one (001b - xx.53 version number) is only available for registered users and has a fully revamped memory b/w checker, which fully takes into account hardware prefetch (sp) on the XP's and also doesn't falsely inflate Pentium 4's memory results.

I get 2100 MB/s ALU and 2050 MB/s FPU on my rig.

I'm just 7% slower than a Pentium 4 2.0ghz on i850 using dual-channel RDRAM (sp).

Now THAT's more like it.

(For reference, I'm also 18% faster than the AMD760 on ALU and 20% faster on FPU... this is all with respect to MEMORY BANDWIDTH performance).