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A (Somewhat) detailed insight into Bulldozer Performance - Page 3

post #21 of 55
Quote:
Originally Posted by HothBase View Post
So... Piledriver next, another eternal wait begins?

Lol, I'm far from in a hurry, just bored and I hoped BD would bring some fun to the enthusiast crowd.
When are the high-end Piledrivers due anyway?
No projected date I've seen for Desktop Piledriver (Vishera). We should get a good idea of performance in Q1 2012 with the APU's (Trinity). Llano (based upon K10) performed about the same as Phenom/Athlon II just with lower clocks, so I expect Trinity to perform similar to Vishera but Vishera to obviously be clocked higher.
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post #22 of 55
Quote:
Originally Posted by Brutuz View Post
3) Power consumption: Now, this is a doozy of an issue, a CPU pulling easily nearly 500w alone?
The CPU doesn't pull 500w alone.

Any test that shows this has either been misinterpreted, or is not showing only CPU power consumption.

Nothing outside of very high-end water, heavy duty phase, or a DICE/LN2 pot is going to be able to move 500w of heat away from a CPU.

500w on air, or more modest water, would result in a CPU being far to hot to test.

Quote:
Originally Posted by MediaRocker View Post
We're already barely utilizing 4 cores! Why would we need 8?
"We" is a strange pronoun to use when speaking for yourself.

I regularly max out utilization on my Gulftown, and will likely do so when I can get my hands on an 8 core, 16 thread, SB-E Xeon.
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post #23 of 55
Maybe AMD should offer a buyback credit to those upgrading to a new Piledriver CPU from Bulldozer when they're released. Just a thought.
post #24 of 55
Quote:
Originally Posted by Blameless View Post
"We" is a strange pronoun to use when speaking for yourself.

I regularly max out utilization on my Gulftown, and will likely do so when I can get my hands on an 8 core, 16 thread, SB-E Xeon.
Lemme rephrase, the vast majority of users will never FULLY utilize their procs. (When Folding I fully utilize all 6 of my cores...) In addition, there's only a slight increase in performance per core addition... I wish I could find the article which notates that most games and apps released only have a minor increase in performance when more cores are added...

The only game that I know(there may be others of course...) that is capable of supporting full hexacore utilization is DiRT.
Edited by MediaRocker - 10/13/11 at 3:52pm
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post #25 of 55
the point of the bios has come up hard all the asus boards flop the bd then you see an asrock board and absolutely way better performance.... could only be that one manufacturer made a huge roost and in turn burned the partner.

"nothing" is impossible
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post #26 of 55
Quote:
Originally Posted by capitaltpt View Post
the names make more sense: Bulldozer does the dirty work, is slow, but clears the way. Piledriver hammers down the foundation. Steamroller paves the road to the future. Excavator demolishes the competition.
Love it not sure about the last one tho. Yes well from some of the good points I have seen made on here I do think AMD can and will improve by how much only time will tell,
post #27 of 55
if you want AMD to improve don't buy Bulldozer, you'll just encourage them to make something just as bad.
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post #28 of 55
Quote:
Originally Posted by HothBase View Post
So... Piledriver next, another eternal wait begins?

Lol, I'm far from in a hurry, just bored and I hoped BD would bring some fun to the enthusiast crowd.
When are the high-end Piledrivers due anyway?

Q3 of 2012
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post #29 of 55
Wait... Bulldozer? You mean dumptruck?
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post #30 of 55
Great post OP, I was thinking almost exactly the same thing. There is so much impact the new architecture has. They made very big changes and it is only natural that they are not very well suported yet.

This for example:
Quote:
Originally Posted by Anandtech
Compared to Sandy Bridge, Bulldozer only has two advantages in FP performance: FMA support and higher 128-bit AVX throughput. There's very little code available today that uses AMD's FMA instruction, while the 128-bit AVX advantage is tangible.
From Anandtech's review. Bulldozer's FPU is at a disadvantage for FP heavy loads. This is something they said is supposedly not heavily used in most situations (and it costs a lot of resources, which is their reasoning for cutting the count in half), but for the situations that it is they have their new FMA and XOP instructions that should help ease the load. Unfortunately, it is hardly supported right now, if at all.

The scheduling thing is a big one as well. The results of the 4 module/4 core tests show that the module-shared resources approach is hindering the performance of BD for some reason (link to the source of the Xtemesystems post here, source of what you linked). 30-50% increase is significant! If this is the case, IPC would be an improvement over Phenom II. Also, considering the changes to the pipeline (which would inherently lower IPC while increasing clock speed), that is pretty amazing.

There was also a review somewhere talking about scheduler optimization that would help as well. I cannot find it right now, but it talked about putting threads that shared information into the same module, and moving other threads into their own modules until there are no modules without a thread. I looked for half an hour but I can't find it, but I'll look again tomorrow. Of course, this is not the case in Windows 7.

In the end, I think with everything that is stacked up against it, it is amazing that it achieved the results that it did, and when they overcome those obstacles (whether its soon in Zambezi or in future revisions) it can turn out to be quite a decent chip. Unfortunately, in the current state of things, the final performance is underwhelming, although some people blow it out of proportion.
    
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