Fr@gsta
Legacy Member
goede goede morgen, goeiedag, blij dat ik dit hier even melden mag (ritmisch lezen, anders trekt het op niveel)
Toen ik xtremesystems.org voorpagina vluchtig bekeek kwam ik dit tegen.
Ik heb het zelf nog niet getest, maar ben dit wel zo snel mogelijk van plan.
ATi kaarten zouden performanceboost moeten krijgen door aanpassing van de
main shader zogezegd.
artikel Beyond3D
Humus from Beyond3D posted a tweak wich increases the Doom3 performence of ATi cards signifficantly without decreasing the image quality by manipulating the main rendering shader.
Most people report a 20% boost meassured in timedemo1, the actual in-game performence boost is reported to be higher though by all people who tried the tweak.
"Conclusion and discussion:
I don't want to complain about Carmack's work, I still consider him to be the industry leader in graphics engines. Though when I read the shader it striked me how many texture accesses it did compared to the relatively short shader, even for stuff that could just as well be done with math for a small cost in instructions. Using a dependent texture lookup for POW evaluation makes a lot of sense for R200 level hardware due to instruction set limits, but for R300 and up it's much better to just spend the three cycles it takes to evaluate POW with math instead of risking texture cache trashing with a dependent texture read, which may be much more costly, especially since the access pattern in this case will be far from linear. Also, using math improves the quality too, even though it may not be very noticable in this game."
here is o*ne example of the results people have with this tweak:
Before the Tweak:
1024x768 High NoAA/8XAF = 73.3fps
1024x768 High 2XAA/8XAF = 62.7fps
After the Tweak:
1024x768 High NoAA/8XAF = 88fps
1024x768 High NoAA/8XAF = 76.7fps
System Specs:
AMD FX-53 @ stock speed
ASUS A8V Motherboard
ATi x800 Pro @ 588(core)/558(mem) w/vmod
Corsair TwinX1024 3200XLPRO Before Humus:
-Humus
Toen ik xtremesystems.org voorpagina vluchtig bekeek kwam ik dit tegen.
Ik heb het zelf nog niet getest, maar ben dit wel zo snel mogelijk van plan.
ATi kaarten zouden performanceboost moeten krijgen door aanpassing van de
main shader zogezegd.
artikel Beyond3D
Humus from Beyond3D posted a tweak wich increases the Doom3 performence of ATi cards signifficantly without decreasing the image quality by manipulating the main rendering shader.
Most people report a 20% boost meassured in timedemo1, the actual in-game performence boost is reported to be higher though by all people who tried the tweak.
"Conclusion and discussion:
I don't want to complain about Carmack's work, I still consider him to be the industry leader in graphics engines. Though when I read the shader it striked me how many texture accesses it did compared to the relatively short shader, even for stuff that could just as well be done with math for a small cost in instructions. Using a dependent texture lookup for POW evaluation makes a lot of sense for R200 level hardware due to instruction set limits, but for R300 and up it's much better to just spend the three cycles it takes to evaluate POW with math instead of risking texture cache trashing with a dependent texture read, which may be much more costly, especially since the access pattern in this case will be far from linear. Also, using math improves the quality too, even though it may not be very noticable in this game."
here is o*ne example of the results people have with this tweak:
Before the Tweak:
1024x768 High NoAA/8XAF = 73.3fps
1024x768 High 2XAA/8XAF = 62.7fps
After the Tweak:
1024x768 High NoAA/8XAF = 88fps
1024x768 High NoAA/8XAF = 76.7fps
System Specs:
AMD FX-53 @ stock speed
ASUS A8V Motherboard
ATi x800 Pro @ 588(core)/558(mem) w/vmod
Corsair TwinX1024 3200XLPRO Before Humus:
-Humus
ook is ff proberen straks
ad: ik ben wel geintereseerd, want donderdag heb ik doom³ uit frs, en ik heb maar een 9200SE 