On Modern Hardware the difference is minimal, aside from a very interesting result on a a quad core i5 with 16gb ram. This system was fully able to utilize the benefits of PAE, however did so with an unexpected side effect. Obviously on an modern system with more than 4Gb ram, a user should be using a 64bit release.Q5sys wrote: I was curious as to the results everyone here is speaking about. I would be interested in seeing the 'results' that people are basing their opinions on. Because the only results I have seen before show that PAE isnt quite as fast as non-PAE.
So i decided to spend some free time today (which I happen to have) and compare the newest Slacko 5.4 on 4 machines. I burned the PAE and the non-PAE ISOs, and booted them.
Each computer was tested the same way. Boot the system from the CD, load the OS into ram, and run Hard-info.
The worst result as I expected was on older hardware, where ram is minimal and is precious. The system had enough ram to boot and as such the ISO loaded into ram. The extra memory used for PAE, which is required, impacts older minimal hardware more than modern hardware. On older hardware running PAE is a severe drain of precious resources, and as such should NOT be encouraged.
Overall the results are mixed. On Modern hardware PAE is slower than non-PAE in some tasks but not others. However on older hardware it was slower across the board, and on older hardware a 2% performance decrease is much more noticeable in the user experience than on a modern system.
Toshiba 7200 Cte Laptop
Total RAM on PAE is 2% less than non-PAE.
Free RAM on PAE is 36% less than non-PAE.
Benchmarks -
Blowfish - PAE is 2% slower than non-PAE
CryptoHash - PAE is 1% slower than non-PAE
Fibonacci - PAE is 1.5% slower than non-PAE
N-Queens - PAE is 1% slower than non-PAE
FFT - PAE is 2.7% slower than non-PAE
RayTracing - PAE is 2.3% slower than non-PAE
Acer Aspire One D257 Netbook
Total RAM on PAE is 1% less than non-PAE
Free RAM on PAE is 1% less than non-PAE
Benchmarks -
Blowfish - PAE is <1% slower than non-PAE
CryptoHash - PAE is 2% faster than non-PAE
Fibonacci - PAE is <1% slower than non-PAE
N-Queens - PAE is 2% faster than non-PAE
FFT - PAE is 1% slower than non-PAE
Raytracing - PAE is 2% faster than non-PAE
Lenovo Y510 with 4gb ram
Total RAM on PAE is 1% less than non-PAE
Free RAM on PAE is 3% less than non-PAE
Benchmarks -
Blowfish - PAE is 1% faster than non-PAE
CryptoHash - PAE is 1% slower than non-PAE
Fibonacci - PAE is 7% faster than non-PAE
N-Queens - PAE is <1% slower than non-PAE
FFT - crashes hard-info - so no results
Raytracing - crashes hard-info when run - so no results
Custom Built Intel i5 system with 16gb ram
Total RAM on PAE is 530% greater than non-PAE (what we would expect)
Free RAM on PAE is 603% greater than non-PAE (what we would expect)
Used RAM on PAE is 1% higher than non-PAE (what we would expect due to how PAE works)
Benchmarks -
IMPORTANT DISCLAIMER: PAE system @ 2800Mhz compared to non-PAE running @ 1200Mhz
Blowfish - PAE is <1% faster than non-PAE
Cryptohash - PAE is 9% slower than non-PAE
Fibonacci - PAE is <1% slower than non-PAE
N-Queens - PAE is <1% slower than non-PAE
FFT - PAE is <1% faster than non-PAE
Raytracing - PAE is <1% faster than non-PAE
This is not what I expected. On this sytem I expected PAE to be much faster than non-PAE. The fact that PAE is only marginally faster than non-PAE when run at 233% processor speed is very suprising to me. Moreso considering that when Cryptohash on PAE was running the CPU at 2800Mhz it was 9% slower than the non-PAE running Cryptohash with CPU at 1200Mhz.
(I preformed this test 3 more times and got the same results, so its not a random result)
LINKS:
http://q5sys.info/pae/tests/hardinfo_re ... 00cte.html
http://q5sys.info/pae/tests/hardinfo_re ... 00cte.html
http://q5sys.info/pae/tests/hardreports ... 200cte.png
http://q5sys.info/pae/tests/hardreports ... 0cte-2.png
http://q5sys.info/pae/tests/hardreports ... 0cte-3.png
http://q5sys.info/pae/tests/hardinfo_re ... -D257.html
http://q5sys.info/pae/tests/hardinfo_re ... -D257.html
http://q5sys.info/pae/tests/hardreports ... e_D257.png
http://q5sys.info/pae/tests/hardreports ... D257-2.png
http://q5sys.info/pae/tests/hardreports ... D257-3.png
http://q5sys.info/pae/tests/hardinfo_re ... -t510.html
http://q5sys.info/pae/tests/hardinfo_re ... -t510.html
http://q5sys.info/pae/tests/hardreports-Lenovo_Y510.png
http://q5sys.info/pae/tests/hardreports ... Y510-2.png
http://q5sys.info/pae/tests/hardreports ... Y510-3.png
http://q5sys.info/pae/tests/hardinfo_re ... _16gb.html
http://q5sys.info/pae/tests/hardinfo_re ... _16gb.html
http://q5sys.info/pae/tests/hardreports-i5_16gb.png
http://q5sys.info/pae/tests/hardreports-i5_16gb-2.png
http://q5sys.info/pae/tests/hardreports-i5_16gb-3.png