"Corretly OC Crucial Ballistix 1866 Memory on AM3+" aka "Journal of an Overclocking Addict" - Page 11

I have a XFX 4870 1GB XXX Edition.







Alright I've figured a few things out.



The reason the video card flickered wasn't because of the 950 DRAM speed.....it was because of how it was setup.
clock ids
00 = boot (doesn't matter I will leave it alone)
01 = low (single monitor?)
02 = medium (single monitor?)
03 = high (single monitor?)
04 = UVD (video decode)
05 = UVD (video decode)
06 = UVD (video decode)
07 = low (dual monitor?)
08 = medium (dual monitor?)
09 = high (dual monitor?)



Defaults clocks on original XXX BIOS:
01 = 600 core / 900 dram
02 = 600 core / 900 dram
03 = 775 core / 950 dram

04 = 775 core / 950 dram
05 = 775 core / 950 dram
06 = 775 core / 950 dram

07 = 600 core / 900 dram
08 = 600 core / 900 dram
09 = 775 core / 950 dram



Rule #1 all dram speeds in a set
(01-03, 04-06, 07-09)
MUST match to avoid flicker.

Rule #2 if the core / clock speeds of clock id 04, 05, and 06 match 03 and 09 then performance will increase.

01 = 600 core / 950 dram
02 = 600 core / 950 dram
03 = 775 core / 950 dram

04 = 775 core / 950 dram
05 = 775 core / 950 dram
06 = 775 core / 950 dram

07 = 600 core / 950 dram
08 = 600 core / 950 dram
09 = 775 core / 950 dram



So....set clock id 01 through 09 DRAM speed to the same number.....it just makes life simpler.
And....set clock id 03, 04, 05, 06, 09 CORE speed to the same number....it improves performance. They got this right in the original BIOS.

Currently I am running 830 CORE and 1025 DRAM speeds and I adjusted the fan profile for 45C to 101C.

I tested 820 core speed with 900, 925 (medium improvement), 950 (medium improvement), 975 (medium improvement), 1000 (small improvement), 1025 (large improvement), 1050 (almost no improvement).
So I ended up with 1025 DRAM speed.

The original fan profile was 58C to 101C. In a Furmark test the maximum temperature dropped from 72C to 68C.
The fan speed gets to about 42% at 70C. This is enough to make the fan audible.
Only at 50% does the fan start to become annoying.

In a 3dmarkvantage test the temperature does not go above 65C (even better).
I already disassembled the card and applied new Prolimatech PK1 heat dope.

I'm not sure how much higher the core speed will go on this model.
I don't want to push it too hard.
I reached my goal already of just over 12,000P in 3dmarkvantage.
Edited by Cancer - 3/10/13 at 9:01pm

Hmmmmmmmmmmmmmmmmm.......well that's not a bad idea.
But I wouldn't use an Asetek....I'd probably go custom as to weed out any undesirable components.
I cherry-picking components.

I have kicked around the idea of giving a first try at watercooled OC with this machine because it is NOT my main rig but it is pretty fast.
Most of the parts are leftovers so the total cost of the system makes for a lessened risk should something go wrong.

But before I do that I want to finish the LED fan project on the main rig.