Here it is:the picture is gone... is it available anywhere else?
thx
http://forum.beyond3d.com/showthread.php?p=1136325#post1136325
Here it is:the picture is gone... is it available anywhere else?
thx
Hmm, there's now mention of Rv770 having a split clock domains ala G8x and G9x?
Considering that rumors now are that it has 480 SPs and 32 texture units on 16 ROPs, wouldn't a higher shader clock just keep the bottleneck in the texturing units?
Regards,
SB
What if the TUs would also work at shader domain clock? Maybe instead of 6 clusters with 16x5 shader units and 32 tmus, 4 clusters with 24x5 shader units and thus 24 tmus? The texel fillrate numbers would be different, but close at the rumoured clock speeds. Sure the 6 cluster version sounds better, but also significantly more complex, and as you pointed out would be quite a bit more different to rv670.I'm dubious about a clock domain for the ALUs because of the use of the register file. Both ALUs and TUs appear to work directly with the register file which makes me sceptical about the timing of reads and writes if ALUs and TUs are clocked independently.
One of the interesting comments in that article is "According to our sources, AMD is no longer clocking the cards towards performance, but towards power efficiency instead." .
It seems to me a subtle change that would come from the "AMD" portion of the company where the importance of being the absolute fastest at whatever costs, is now being directed to make the best card for a Platform. ATI as a separate company competed against nVidia only and as such the nature of the competetion always had the goal of being the fastest. With AMD at the helm it seems that there is more emphasis on price and balance.
While for some this is bad in that it does not seem to push the envelope for speed, the new direction is aiding all of us in pricing. If we had kept going in the old direction, the costs of the top end graphics card would have been astronomical whereas its getting reasonable. Those of us that never would have bought the top end are now first the first time in ages allowed to buy at reasonable price pretty performant cards from both nVidia and AMD.
At least from my perspective, that is good.
Hmm, there's now mention of Rv770 having a split clock domains ala G8x and G9x?
Considering that rumors now are that it has 480 SPs and 32 texture units on 16 ROPs, wouldn't a higher shader clock just keep the bottleneck in the texturing units?
Regards,
SB
ATI has had split clock domains for a long time in current chips.
Heh, that reminds me, when I saw one of those at Newegg's site the other day, I thought "that's not a powersupply, that's a heater."A friend of my son who has built his super power machine, 1000Watt power supply and nVidia 8800GTX over clocked made me laugh when he said that he can't leave his computer on anymore overnight because his room gets so heated up that it kept waking him up.
Intel-based system (Power Draw 442 Watts):
- Quad-core Core 2 Extreme QX6700 CPU (Kentsfield) overclocked to 3.5GHz
- Two Foxconn GeForce 8800GTX graphics cards in SLI mode
- ASUS Striker Extreme mainboard (LGA775, NVIDIA nForce 680i SLI)
- 2GB DDR2-800 SDRAM (Mushkin XP2-6400PRO, 4 x 512MB)
- Two Western Digital WD1500AHFD hard disk drives in a RAID0
- Various trifles like a DVD-ROM, fans, etc
We installed Windows XP SP2 on these systems and ran Stress Prime 2004 / Orthos for the CPU and 3DMark 2006 for the graphics card; these two programs were running simultaneously in the third test mode. Here are the PSU power consumption numbers (using a Tagan TurboJet TG1100-U96; we measured its power draw from the wall outlet and multiplied the result by this PSU’s efficiency factor, about 0.83):