[GM5]

Adrian .......I entered 64, ..yet I don't understand why the XP64 icon doesn't show up ?? ----anyway, ......same lame time 1 hour 10 m 03 seconds.

DUMPING THE 64bit for 32bit now .........

__________________________________

Did you run the 32bit test yet? If not, make sure you don't have a bunch of stuff running in the background. I ran the benchmark again and knocked off 18 seconds just by closing my browser and email, etc.

I'm curious to see how much time you will save when running the 32bit version...

-Greg

[KurtS]

I think that the last position on the list belongs to me: it is something wrong with the benchmark for the last position now.

[ivox3]

I haven't run it yet Greg .......

I'll post when I do ......

...and good luck to you Kurt on capturing that last place title. A lofty goal indeed....

[dkessler]

So, I was thinking I'd install Windows XP 64-bit on my Mac Pro Octa to render as fast as possible. Apparently 64-bit is not necessary (as shown by aaron haye's post). I've already ordered XP-64; will be here in a couple of days. Keep it and install it, or return it for 32-bit? Advice?

[paxreid]

If you run the 32-Bit Maxwell on a 64-Bit OS system that has 8 MB ram...does the OS allow the 32-Bit application to address the memory over 3MB?

I am in the process of building a computer as well, and was planning on going with xp64

[ivox3]

So, I was thinking I'd install Windows XP 64-bit on my Mac Pro Octa to render as fast as possible. Apparently 64-bit is not necessary (as shown by aaron haye's post). I've already ordered XP-64; will be here in a couple of days. Keep it and install it, or return it for 32-bit? Advice?

Keep it, ....do a dual OS install: 32 for speed and 64 for large renders

Paxreid: No.

[b-kandor]

Well I just got to see the massive slowdown on quad core chips in xp64 - wow, that's depressing!

I fired up my new q6600 - ran benchwell in xp64 and it took 93mins. Then I rebooted into win32 and ran the same benchwell scene in 22:08 - approx. 4.22 times faster.

Kandor

ps. There are some other quad cores on the benchwell list that ran in 20 min. but they list xp64 as the os. Is there something I don't know about?

[paxreid]

Is there any official word or rationale from NL about this issue? Is it a reported bug...or even classified as a bug ?

[numerobis]

Is there any official word or rationale from NL about this issue? Is it a reported bug...or even classified as a bug ?

...not really official, but a statement anyhow :

JDHill is right, you don't expect speed from 64 bits versions (in general). The advantage is about being able to render and edit bigger scenes, bigger textures, more geometry, more output resolution... these kind of things.
Some 3d platforms do have speed improvements in 64 bits though.

In this case a loss of 40% of speed (first post in the thread) didn't seem reasonable/normal, and that's why we're making tests to see if there is a bug, and this last test of yours LeftSide might be a useful hint.
Thanks

from this thread
http://www.maxwellrender.com/forum/view ... w&start=30

[b-kandor]

numerobis: I see a speed difference of 422% on the benchwell test - this is a lot more than 40%!! Do you see the same?

On another mxi that I resumed in win64 it showed the next sl was 24 hours away - so I rebooted in win32 and resumed the same mxi and the next sl was only 8 hours away. (this was starting at 20, going to 21)

[-Adrian]

Btw, if you remember i had a slightly better time (~3min) on Maxwell 64bit with my Core2Duo, but now i ran the test again and it's the same for me. About 35m with 32bit, about 1h40m with 64bit.

[b-kandor]

Really? I thought this slowdown only affected quad cores and higher? I had done the original benchwell test on my e6400 with win64 and scored about 1:30 which was in line with everyone else and about the same speed as win32.

If this is true, then I have another computer to install win32 on (which will waste another 2 gb's of ram )

[numerobis]

i got nearly 60% decrease with the 64 bit mxw...

at 2,7ghz i had this values for the old 1.1 benchmark:

1.5 32bit bench ~180
1.5 64bit bench ~75

i removed the 64bit version after this result, so i can't test again at 3ghz atm...

[-Adrian]

If this is true, then I have another computer to install win32 on

I think WinXP64 is just fine, unless of course you installed it mainly for Maxwell and prefer XP32 in general. I'll stick to XP64, but for now with 32bit Maxwell.

[b-kandor]

I think this is where I'm confused, I didn't know you could install the win32 version of maxwell in the win64 enviroment. Or even how to do this?