Page 1:Was It Worth The Wait?
Page 2:Food For Thought: Reasons For This Design
Page 3:Meet The Entire Family
Page 4:Command Processor (CP)
Page 5:Setup Engine
Page 6:Ultra-Threaded Dispatch Processor
Page 8:SIMD Arrays
Page 9:Texture Units
Page 10:Memory Read/Write Cache
Page 11:Render Back-Ends - AA To Z
Page 12:Z Buffers And HiZ
Page 13:Memory Interface And Distribution
Page 14:Tessellation - Needed Or Preemptive?
Page 15:Real World For Games
Page 16:AVIVO-A Lot Of New Hardware
Page 17:AVIVO-A Lot Of New Hardware (Continued)
Page 18:Show Me The Benchmarks!
Page 19:Test Setup
Page 20:Benchmarks Results
Page 21:F.E.A.R. - XP Pro
Page 22:Dude! Where's My Driver?
Page 23:3DMark05 - Vista Ultimate
Page 24:Doom 3 - Vista Ultimate
Page 25:Pricing, Game Bundles And Availability
"It's about time," is my first reaction. Six months of dragging this out has lost a lot of face with your consumers and with guys like myself. While we can only hope that ATI would come up with an alternative to GeForce 8800 and now 8600, the reality is that some markets get lopsided. Nvidia was first to market and now has a strong head start. Even some ATI fanboys have changed their tune with such a long dry spell.
Personally, I like all of the advanced hardware inside of R600. I am very happy with the implementation of the AVIVO hardware with its audio controller, embedded HDCP key and new HDMI adapter. I have always been a fan of the memory ring. It is advanced. A threaded design with 512-bits in each direction is a memory solution that can deliver some serious bandwidth. The organization of some of the units could have been done a little better. In particular, the number or texture units could have been higher and more importantly, why not build a purely scalar design? Not that it is imperative, but why not? Other than those two items, it should have been faster, more powerful and here a long time ago (wait, I said that last one already **hint, hint **).
Based on the 80-nm process, one can conclude that this is the product we should have had the first time we were told R600 was coming. That being said, it does not put it past speculation that a faster card is coming soon at 65 nm. The only issue there is that Nvidia could have another card available with improved hardware before this next set is here.
Source: Sapphire Technologies - The HD2900XT Toxic is water cooled.
For now, if you were waiting for R600, it is a good thing you did. There are some really nice advances incorporated into the HD 2900XT and the Vista performance of the 1 GB GDDR4 cards have made it the choice of boutique system builders (I just wish we had them in house). At $400 for the version we have in the lab, it is a good price as it has more to offer than the GeForce 8800GTS. The sweet spot is still the 320 MB version of the 8800 GTS but that could change as other versions of the R600 family emerge. Until then, if you were sitting on the fence, you can either keep riding or finally spend you money on something. Versions like the Sapphire HD2900XT Toxic will come factory overclocked with a stand-alone water cooling solution.
Overall, HD2900XT is more forward looking than GeForce 8800 and it should be; it took an extra six months getting it to market. If you are leaning towards longevity of a card, R600 looks more attractive with a dedicated tessellator, programmable filters, high-clock speeds and crazy amounts of bandwidth. It is a hot and a little loud. It is hot enough that a warning label might soon accompany cards and systems. We can only hope that it will become more cool and quiet as more cards hit the market.
We are going to look a little more into the power consumption of the cards as we found some interesting behaviors within GeForce 8800GTX and R600. To wet your appetite, here are a few of the findings. For starters, R600 drew less overall system power than GeForce 8800GTX in the game tests. I personally want to try more applications and settings to see why this happened.
|No Cards - ATI||HD2900XT||HD2900XT CF|
|OS Idle 2||250||428|
|3DM06 HDR1 - GT3||358||549|
|3DM06 HDR2 - GT4||343||527|
|No Cards - Nvidia||8800GTX||8800GTX SLI|
|OS Idle 2||227||233|
|3DM06 HDR1 - GT3||343||569|
|3DM06 HDR2 - GT4||347||519|
There is a lot to discuss regarding R600 vs. G80/84/86. Does internal bandwidth affect the performance of Nvidia's texture units? "Does the five-scalar VLIW hinder performance because there is only one SIMD per block of ALUs? No, it should not, but this and many other questions are being answered through testing and conversations with the manufacturers. Our AVIVO testing needs an update and we need more cards to compare HD 2900 to. We will definitely have more on these subjects over the coming weeks.
- Was It Worth The Wait?
- Food For Thought: Reasons For This Design
- Meet The Entire Family
- Command Processor (CP)
- Setup Engine
- Ultra-Threaded Dispatch Processor
- SIMD Arrays
- Texture Units
- Memory Read/Write Cache
- Render Back-Ends - AA To Z
- Z Buffers And HiZ
- Memory Interface And Distribution
- Tessellation - Needed Or Preemptive?
- Real World For Games
- AVIVO-A Lot Of New Hardware
- AVIVO-A Lot Of New Hardware (Continued)
- Show Me The Benchmarks!
- Test Setup
- Benchmarks Results
- F.E.A.R. - XP Pro
- Dude! Where's My Driver?
- 3DMark05 - Vista Ultimate
- Doom 3 - Vista Ultimate
- Pricing, Game Bundles And Availability