Higher Clock Speeds, No TLB Issues and Better Pricing: The New Phenom
by Anand Lal Shimpi on March 27, 2008 12:00 AM EST- Posted in
- CPUs
The Test
| CPU: | AMD Phenom 9850 (2.5GHz) AMD Phenom 9750 (2.4GHz) AMD Phenom 9550 (2.2GHz) AMD Phenom 9600 (2.3GHz) AMD Phenom 9500 (2.2GHz) Intel Core 2 Quad Q9300 (2.50GHz/1333MHz) Intel Core 2 Quad Q6600 (2.40GHz/1066MHz) Intel Core 2 Duo E8200 (2.66GHz/1333MHz) Intel Core 2 Duo E6750 (2.66GHz/1333MHz) |
| Motherboard: | ASUS P5E3 Deluxe (X38) MSI K9A2 Platinum (790FX) |
| Chipset: | Intel X38 AMD 790FX |
| Chipset Drivers: | Intel 8.1.1.1010 (Intel) AMD Catalyst 8.3 |
| Hard Disk: | Western Digital Raptor 150GB |
| Memory: | Corsair XMS2 DDR2-800 4-4-4-12 (1GB x 2) Corsair XMS3 DDR3-1066 7-7-7-20 (1GB x 2) |
| Video Card: | eVGA GeForce 8800 GT SSC |
| Video Drivers: | NVIDIA ForceWare 169.25 |
| Desktop Resolution: | 1920 x 1200 |
| OS: | Windows Vista Ultimate 32-bit |
Our Stance on Testing with the TLB Bug
The B2 stepping Phenoms suffer from the infamous TLB erratum which, if left unpatched, could potentially result in system instability or silent data corruption. Thus far AMD has only seen negative after effects from unpatched B2 processors in very isolated cases, described to AnandTech as the following:
1) Windows Vista 64-bit running SPEC CPU 2006
2) Xen Hypervisor running Windows XP and an unknown configuration of applications
While these are both isolated cases, they are by no means the only scenarios in which the TLB bug could rear its ugly head. All of the latest Socket-AM2+ motherboards have been updated to fix the TLB bug, at the expense of sometimes significant performance degradation. The table below summarizes our findings in our initial B3 stepping article:
| SYSMark 2007 | DivX | CineBench R10 | 3dsmax 9 | WinRAR | |
| AMD Phenom 9600 (B2 Stepping) - TLB Fix Disabled | 117 | 74.3 fps | 7396 | 7.20 | 1348 KB/s |
| AMD Phenom 9600 (B2 Stepping) - TLB Fix Enabled | 105 | 72.0 fps | 7031 | 6.47 | 367 KB/s |
| Performance Impact | -10.3% | -3.1% | -4.9% | -10.1% | -72.8% |
Since the bug could prove to be a problem in usage scenarios that haven't yet been discovered, we feel that it's best to test these B2 stepping chips with the TLB fix enabled (the default state on all motherboards now). Obviously this doesn't impact the new xx50 CPUs since they aren't plagued by the TLB erratum.
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ap90033 - Thursday, March 27, 2008 - link
What!!!! How darest though speak such blasphemy!AMD is your king! Bow to PHENOM!!! :) LOL
sorry feeling a little silly today.
hvypetals - Thursday, March 27, 2008 - link
Why are the Intel core 2 duo's outperforming the intel quad core cpus?Is it because the games cant see beyond a dual core?
ap90033 - Thursday, March 27, 2008 - link
Thats why I got the E8400 and clocked it to 3.6 ghz, it was cheap and it does very well for gamers....ap90033 - Thursday, March 27, 2008 - link
Oh wait I could have saved 20 bucks and got a much slower AMD. Crap...ap90033 - Thursday, March 27, 2008 - link
Then I would have had an AWESOME slow CPU instead of a CRAPPY much faster CPU....Roy2001 - Monday, March 31, 2008 - link
Wow, that's superb logic!fitten - Thursday, March 27, 2008 - link
Most games can't "see beyond" one core, much less two, three, or four.nycromes - Thursday, March 27, 2008 - link
This is what I expected from AMD and from all of you here making comments. It has always astounded me that people will act like these chips are the equivalent of a 500mhz chip compared to Intel's chips. Its like saying my car has 375hp and yours only has 370, my car is soo much better than yours. The difference is there, but for most people, the difference is quite negligable.The differences amount to almost nothing depending on application. Sure there are better parts out there, but competition drives markets to innovate and will bring down prices. Oh how awful. The intel fanboys can ride their high horses still, but AMD releasing better products benefits us all. Try taking your heads out of that little box and looking at the big picture.
I like to see AMD working on new products and hopefully they can get more competitive. We all need to be hoping for this so we don't see slowdowns in development and skyrocketing chip prices. I mean, look at the GPU industry compared to a few years ago and tell me that the situation is great for consumers. More competition = happier consumers. nuf said.
ap90033 - Thursday, March 27, 2008 - link
you are right, and you obviously dont game. Intel=FPS=FTWmark3450 - Thursday, March 27, 2008 - link
What a complete strawman. Look at the data, the best Phenom chip is getting beated by the q6600 by 20% in real world performance, not the 1% in your idotic horsepower strawman attack.Yes everyone understands that the lack of competion isn't good. The reason people bitch at AMD is that they want AMD to have a competative offereing, but that data clear says they don't. They know because of that there isn't going to be any competition in the CPU market for a long time. Yes that isn't good, but sticking your head in the sand and denying the reality of the situation doesn't help.