150 MHz QS Bus Speed!

[aBc]

Please provide specific configuration details of the Quicksilver in use here. Was this with the simple150 MHz System bus tweak AND an overclocked 1.0 GHz DP CPU… and with a modified GPU?

“…the system will run and bench mark just fine with some memory combinations but when running newer games - instabilities creep in. Doom 3 is an example of this, when playing that game on my quicksilver i get lockups or stutters on sticks that were totally stable for days while web browsing or light multimedia.” - Ncc74656


Rember memory testing program -

Current version requires Mac OS X v.10.5
Alternate download: Rember v.0.3.4b (Mac OS X, v.10.3.9-10.4.x)
Legacy downloads: Rember v.0.3b (Mac OS X, 10.3.8 and lower)
Deprecated: Rember v.0.2.1b (Mac OS X, 10.2.x)

https://www.kelleycomputing.net/rember/


Excerpts from Macworld - March 2, 2005
(Suggest that gamers read the entire article.)

•Doom 3 has very demanding system requirements — the highest we’ve seen on a Mac game to date. A 1.5GHz G4 is the minimum, along with an ATI Radeon 9600 or Nvidia GeForce FX 5200 graphics system with at least 64MB VRAM. These specs aren’t wildly out of sync with Doom 3’s PC counterpart, either — this game really asks a lot of hardware regardless of platform.

•Our test setup
First, a little bit on our gaming rig: It’s a Power Mac G5 2.5 GHz dual processor model, equipped with 2.5GB of RAM and ATI’s new Radeon X800 XT Mac Edition graphics card — the fastest ATI card you can get on the Mac, equipped with 256MB VRAM.

https://www.macworld.com/article/174720/doom3-7.html


I’ve experienced zero problems here with the 150 MHz System Bus tweak… but I've not yet tested it with an overclocked single (or dual) Quiksilver CPU - nor have I used a modified GPU. AND I don’t run games. Perhaps there are certain performance / tasking & modification limitations to be considered? Especially in regards with the basic stated system requirements… for DOOM 3?

As always... YMMV.

[Ncc74656]

thats a good writeup on doom. i used it because i wanted something that was os X native and could really stress the system - so id have good benchmark data from one to the next.  quake III didnt work for that anymore.


https://i.imgur.com/l8zN2jW.jpeg

System:  G4 quicksilver 877Mhz
modification: front side bus clocked to 150
dual 1.0ghz cpu board swaped on with external voltage mod and overclock to 1.13ghz at 2.15v    this leads to a final clock of 1.275Ghz per die.
memory is dual 512mb hynix chip SD
added fans for cooling cpu board were required, thermal grizzly paste.
Radeon X800 pro PC.  flashed to X800 mac, clocked to 535Mhz core, 610Mhz memory

https://i.imgur.com/XwlxNaE.jpeg

running Mac os 10.5.9

the memory will run in desktop just fine. i never had a crash or issue with synthetic benchmarks, browser, movies, or what ever else.  however in games that loaded heavy ram - it would lock up most of the time.  in using REMEMBER to test each stick, one by one, i found one stick was bad out of my pile.  i then took a small 256mb single stick and added a 512 to test with two banks. i found the off brand memory would error early on when paired with the 256 but the hynix did not.  i then paired two 512 hynix together and htey passed memory test.

after that i tried all my other ram with those two hynix and none of them cleared the memory test with all 3 populated to 1.5gb. i found one stick that did work but it was a 256 so i used 1.25gb of ram. when doing this i found a solid 10-15 fps when entering a new room in doom3, in halo it would also drop when rapidly turning around or cresting a hill to load new textures. with the 1gb dual stick it did not do this. i would at most see a few frames less while it loaded new textures.

i did find the X800 runs better (by a good 6-9fps) in 10.5 as opposed to 10.4 under doom3

temps were not an issue: https://i.imgur.com/2x0ZcyS.png
https://i.imgur.com/zOFyEhS.png