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Partial Depth Buffer problem with ATI cards?

Anakaro

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#1
Hey guys. I installed Simcity 4 recently and as always got an annoying jerkiness when scrolling. According to the SC4 documentation earlier ATI cards (before 9500) had this problem...

" # The Radeon series has a very slow path for partial
# depth buffer copies. This has apparently been
# fixed for 9500 and later models in the latest drivers,
# but cannot be fixed on previous Radeons because of
# hardware limitations."

I have the 9800SE and suspect that the above may still be a problem which will explain the annoying jerkiness in any game where scrolling is required. Does anyone know something about this or if there is a fix for it?
 

peta01

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Location
Prague
Processor AMD Athlon 64 3000+ Venice (OC 2500 MHz)
Motherboard Abit AN8 Ultra - passive northbridge cooling via heatpipe
Cooling Cooler Master Hyper 48 (almost 1 kg of copper :) )
Memory 1GB RAM (2x512 DDR, CL2, running at 137 MHz)
Video Card(s) Sapphire X800GTO2 (510/585, 16p) AC ATI Silencer
Storage 320 GB Seagate, 200 GB Western Digital, 120 GB Seagate
Display(s) LG 22" LCD Panel
Case Chieftec blue bigtower with additional cooling
Audio Device(s) AC97 raiser card on mainboard
Power Supply Chieftec 360W
Software WinXP SP2, sometimes Vista Ultimate x64
#2
Did you try to enable vertical synchronization?
 

Anakaro

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#3
Yeah that does not help. It's strange because my old MX440 worked much better on older games like Diablo 2 etc. Scrolling was always smooth. I think this an ATI design flaw.
 

peta01

New Member
Joined
Sep 10, 2005
Messages
387 (0.09/day)
Likes
0
Location
Prague
Processor AMD Athlon 64 3000+ Venice (OC 2500 MHz)
Motherboard Abit AN8 Ultra - passive northbridge cooling via heatpipe
Cooling Cooler Master Hyper 48 (almost 1 kg of copper :) )
Memory 1GB RAM (2x512 DDR, CL2, running at 137 MHz)
Video Card(s) Sapphire X800GTO2 (510/585, 16p) AC ATI Silencer
Storage 320 GB Seagate, 200 GB Western Digital, 120 GB Seagate
Display(s) LG 22" LCD Panel
Case Chieftec blue bigtower with additional cooling
Audio Device(s) AC97 raiser card on mainboard
Power Supply Chieftec 360W
Software WinXP SP2, sometimes Vista Ultimate x64
#4
And did you try different drivers? You can also apply the newest patch for tha game.