Overclocking a HIS X1800GTO

B

Blinkme323

[H]ard|Gawd
Joined
Feb 8, 2005
Messages
1,666
Hi, I just bought a HIS X1800GTO IceQ for $150 since I couldn't spring the $240 for a 1900XT. I'm going to keep a log of my overclocking efforts because I think this card has a lot of potential. I appreciate any suggestions as I'm going through the process.

Testing setup, DHzer0point 6.8 Drivers with no CCC and ATI Tray Tools 1.2.6.930. System running on a Forton 450W powersupply, 24 Hour Prime stable. Micro ATX case with temps around 38-41C. Fan speed on card is currently locked at 68% for testing as this was the best compromise I found.

First step was to modify the stock bios to 16 pipes and I was successful in my attempt at unlocking. Next up, raise those clocks up from 520/500. Working on the core first:

1.1v (stock) ------- Artifacts at 610 (59C load)
1.15v ---------- Minor artifacting at 640 (60C Load)
1.2v ---------- Froze at 655 (60C Load)
1.225v ---------- Minor Artifacting at 675 (62C Load)
1.25v ---------- Minor Artifacting at 690 (63C Load)
1.275v ---------- Minor Artifacting at 700 (64C Load)
1.3v ---------- Minor Artifacting at 705 (66C Load)
1.325v ---------- Froze at 720 (67C Load)
1.35v ---------- Bad Artifacting at 725 (68C Load)
1.4v ----------- Froze at 730 (71C Load)

Now on to memory.

1.89v (stock) ----------- Froze at 625
 
I still can't figure out how to raise the memory voltage through ATI Tray tools, so I settled on 680/620 with 1.25v GPU. With 16 pipes, this card absolutely destroys my old 7600gt. And, I love having HQ AF back.
 
I reinstalled ATI Tray Tools and unchecked the box that said Enable old IC2 control system. Now the memory voltage adjustments work. And the memory is flying. Just bumping it up to 1.95v got it up to 680 stable and counting. Can't wait to see how high this stuff will go.
 
Despite how great the memory responded to a .05v memory increase, it didn't like too much more than that. Even 2.1v only netted 690mhz. So, I finally settled in on my everyday 100% stable overclock.

1.25v GPU
1.96v Memory
16 Pipes
675/675 Clocks
65C Load

Not bad for a $150 card. Downloading 3dmark05 now.
 
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