Poster | Thread |
pavlor
| |
AmigaOne XE-G4 L3 cache? Posted on 28-Mar-2015 11:43:11
| | [ #1 ] |
|
|
|
Elite Member |
Joined: 10-Jul-2005 Posts: 9591
From: Unknown | | |
|
| Do G4 CPUs in AmigaOne XE (7451 and 7455) have L3 cache? I think yes, as models without L3 cache are 7441 and 7445, but AmigaOne article on Wikipedia states otherwise. Anyone with G4 XE? I rather ask before removing that nonesense from article. |
|
Status: Offline |
|
|
tonyw
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 28-Mar-2015 11:50:34
| | [ #2 ] |
|
|
|
Elite Member |
Joined: 8-Mar-2003 Posts: 3240
From: Sydney (of course) | | |
|
| @pavlor
IIRC the L3 cache was external to the chip. I have seen a couple of G4 processors (I think) with some SIMMs soldered to the reverse side of the CPU daughter board. Most modules don't have them.
IIRC (again) the L3 cache was found to make no great improvement, so was not installed on later models of the CPU modules.
_________________ cheers tony
Hyperion Support Forum: http://forum.hyperion-entertainment.biz/index.php |
|
Status: Offline |
|
|
pavlor
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 28-Mar-2015 11:57:31
| | [ #3 ] |
|
|
|
Elite Member |
Joined: 10-Jul-2005 Posts: 9591
From: Unknown | | |
|
| @tonyw
So there were modules with L3 and without L3? Then better to leave article as it is. Thanks for info! |
|
Status: Offline |
|
|
evilFrog
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 28-Mar-2015 12:55:32
| | [ #4 ] |
|
|
|
Regular Member |
Joined: 20-Jan-2004 Posts: 397
From: UK | | |
|
| @tonyw
Interesting stuff, you learn something new every day.
Any idea if I can find out which version I have without opening up the case and digging around again? I do know I have the motherboard without the onboard sound, so it'd be pretty likely I don't have the L3 as well, I guess. _________________ "Knowledge is power. Power corrupts. Study hard, be evil." |
|
Status: Offline |
|
|
pavlor
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 28-Mar-2015 12:57:22
| | [ #5 ] |
|
|
|
Elite Member |
Joined: 10-Jul-2005 Posts: 9591
From: Unknown | | |
|
| @evilFrog
L3 should show eg. in Ranger, I think. |
|
Status: Offline |
|
|
Severin
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 28-Mar-2015 13:11:29
| | [ #6 ] |
|
|
|
Elite Member |
Joined: 19-Aug-2003 Posts: 2740
From: Gloucestershire UK | | |
|
| |
Status: Offline |
|
|
pavlor
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 28-Mar-2015 13:31:19
| | [ #7 ] |
|
|
|
Elite Member |
Joined: 10-Jul-2005 Posts: 9591
From: Unknown | | |
|
| @Severin
Quote:
Open a shell and type cpu{return} |
Well, yes. |
|
Status: Offline |
|
|
DWolfman
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 29-Mar-2015 2:27:41
| | [ #8 ] |
|
|
|
Super Member |
Joined: 18-Jun-2003 Posts: 1442
From: Leavenworth, KS USA | | |
|
| @thread
Yup, and I happen to have one.
To see what it looks like with the chips on the CPU module board, look at Hypex's avatar. The two big chips at the top of the board are the L3 cache chips.
I've had two A1 XE-G4 systems, the first one did not have those chips on it, and it had the 933 MHz 7455 CPU. This one with the L3 chips is the same CPU. I don't know that it makes that much difference in how everything runs on it, which is probably why not many have those chips installed. Might be like the on-board audio codec chip that they left off of later boards since they thought it would never work. _________________ This posting, in it's entirety, is the opinion and/or statement of the author and does not reflect the views and/or position of this site. |
|
Status: Offline |
|
|
DWolfman
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 29-Mar-2015 2:56:09
| | [ #9 ] |
|
|
|
Super Member |
Joined: 18-Jun-2003 Posts: 1442
From: Leavenworth, KS USA | | |
|
| Oddly enough, the CPU command and Ranger do not show any L3 cache, even though it is there.
_________________ This posting, in it's entirety, is the opinion and/or statement of the author and does not reflect the views and/or position of this site. |
|
Status: Offline |
|
|
Geri
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 29-Mar-2015 9:54:41
| | [ #10 ] |
|
|
|
Elite Member |
Joined: 7-Oct-2003 Posts: 2038
From: ST/AT | | |
|
| @tonyw
Quote:
tonyw wrote: @pavlor
IIRC (again) the L3 cache was found to make no great improvement, so was not installed on later models of the CPU modules. |
Yes, the L3 cache only uses 133MHz single data rate RAMs, even if the CPU's L3 interface could actually connect to DDR RAMs. Thus the L3 cache will only have the performance of the normal system memory - ok, maybe a little bit better, because the CPU doesn't have to go through the northbridge._________________ A1SE: G3@600MHz, 2GB, 1GBit network card A1XE: G4@933MHz, 2GB, refitted AC'97 codec microA1: G3@800MHz, 1GB
- A1 Linux support - |
|
Status: Offline |
|
|
Severin
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 29-Mar-2015 13:35:17
| | [ #11 ] |
|
|
|
Elite Member |
Joined: 19-Aug-2003 Posts: 2740
From: Gloucestershire UK | | |
|
| @DWolfman
Try Ragemem:
CPU: P.A. Semi PWRficient PA6T-1682M B1 @ 1800 Mhz Caches Sizes: L1: 64 KB - L2: 2048 KB - L3: none Cache Line: 64
Last edited by Severin on 29-Mar-2015 at 01:36 PM.
_________________ OS4 Rocks X1000 beta tester, Sam440 Flex (733)
Visit the Official OS4 Support Site for more help.
It may be that your sole purpose is to serve as a warning to others. |
|
Status: Offline |
|
|
DWolfman
| |
Re: AmigaOne XE-G4 L3 cache? Posted on 29-Mar-2015 16:52:25
| | [ #12 ] |
|
|
|
Super Member |
Joined: 18-Jun-2003 Posts: 1442
From: Leavenworth, KS USA | | |
|
| @Severin
Hmm, even that says none. Now I wonder if it really is there and working? Next time I take it apart, I'll check it. _________________ This posting, in it's entirety, is the opinion and/or statement of the author and does not reflect the views and/or position of this site. |
|
Status: Offline |
|
|