Personal computing discussed

Moderator: Starfalcon

 
meerkt
Graphmaster Gerbil
Topic Author
Posts: 1174
Joined: Sun Aug 25, 2013 2:55 am

Sidegrading C2D

Thu Jun 06, 2019 7:03 pm

For no good reason at all I toyed a bit with two similar C2D CPUs: an E7400 with 3MB cache, and a Pentium E6600 with 2MB (that's not the C2D E6600). I set them both to 306 x 10 = 3.06GHz, which is an overclock for the E7400's 2.8GHz and a sideclock for the E6600's default 266x11.5.

I benchmarked with WinRAR, 7zip, SuperPI, and AIDA64. They ended up practically the same. Only one specific AIDA test gained +7% on the E7400, maybe due to the cache. But there's one peculiar deficit: the E7400 is -4% in 7zip decompression. Any idea why that might be?

And ignoring RAM, any thoughts on FSB vs multiplier?

PS: Aren't mobos supposed to beep when the P4 12V is not connected? At first I thought the CPU was bad. :)

PS2: Did you know Intel CPUs might differ in features in the same model and stepping, just with a different sSpec? This E7400 is missing VT-x.
 
jihadjoe
Gerbil Elite
Posts: 821
Joined: Mon Dec 06, 2010 11:34 am

Re: Sidegrading C2D

Thu Jun 06, 2019 8:29 pm

IIRC the Pentium is Penyrn, whereas the C2D is Wolfdale.
Pentium has SSE4.1 but smaller cache, which probably causes the differences. Like 7z is more cache sensitive whereas the AIDA64 test might be using SSE4.1.
 
meerkt
Graphmaster Gerbil
Topic Author
Posts: 1174
Joined: Sun Aug 25, 2013 2:55 am

Re: Sidegrading C2D

Thu Jun 06, 2019 8:55 pm

They're both Wolfdale. The E7400 has both SSE4.1 and the larger cache, the E6600 has neither.

Who is online

Users browsing this forum: Waco and 2 guests