| | Emotion Engine, FPU, Vector Units, and GS GFLOPS | | Question | Hank. sos! haha. I've searched all over the web regarding the power of ps2 & gc. I found an article on igncube that respectable software companies such as naughtydog,bioware,ect.has stated that the ps2 does in fact put out more polys ( after t&l, texture & all effects on )but they will be prettier polys on gc because of hardwired s3tc on flipper chip resulting in smaller textures.It was also stated that for cut scenes or what not gc will not be able to do as many cool things as ps2 with those polys because the cpu is weaker. Now, 485mhz gekko looks better than 300mhz EE. But that is only the core. The speed boost in EE gained by tapping the vectors fully can be 20%-100%. So if ps2's cpu is being used 100 % before tapping smart developers can drop that number to approx. !% allowing EE to run at speeds of approx. 590mhz. It's floating point performance is more than twice what gekko's is 6.2 gflops EE 1.9 gflops gekko even the P3 only puts out 3. So the EE & vuo are more powerful in alot of ways than gekko & the P3. But not in all ways such as the tiny 16k level 2 cache or the integer performance of 450 mips EE compared to 1125 mips gekko. But over all, the Gflop rating is a very good benchmark for graphic power. Everything thats done on flipper like misc. rendering fetures can be done on ps2 if handwritten in software mode if vu1 is tapped. ps2 also has higher fill rates, a larger v ram bandwidth 48 gb/sec, a larger main ram with a bigger bandwidth of 3.2gb to gekko's 2.6gb, ram speeds run at 400mhz two way 800mhz effective on ps2 compared to gc's 325mhz. Plus I have both ps2 & xbox and graphics I've seen on gc don't even come close to anything I've played on ps2 or the x.
Thanx for being so patient but my biggest question of all is all graph cards supposedly are higher capabillities than cpu's? So if ati's @ 8.6, gekko @ 1.94. Here is just my theory,EE + vectors 6.2 total, vu1= 3 vu0= 2 fpu= 1.2. If just the fpu on EE is 1.2 & fpu on gekko is 1.94, flipper @ 8.6. This means the GS must put out at least 4 gflops I mean if it has a higher raw poly rate than EE, but GS isn't as advanced due to rendering capabillities so I figure 4 gflops for sony gs. I've looked all over for this spec. PLEASE help, ur my only hope! PEACE OUT!!! By: RAGING GAMER | | Answer | Your theory for Emotion Engine GFLOPS distribution is commended for the effort, but your chosen numbers are unfortunately incorrect.
Emotion Engine at 300MHz
FPU = 0.64 GFLOPS
VU0 = 2.44 GFLOPS
VU1 = 3.08 GFLOPS
Total = 6.16 GFLOPS (~6.2 GFLOPS)
The PlayStation 2 Graphics Synthesizer (GS) puts out zero GFLOPS. It does not support floating point operations.
To save my precious clock cycles, the rest of your gibberish will be ignored and placed in the amatuer basket.
HANK
Date: 2004-10-09
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