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[Anandtech] AMD Launches Excavator on Desktop: The 65W Athlon X4 845 for $70 - Page 2

post #11 of 147
Interesting... I am wondering if this is actually a cut down excavator chip. Since the rumors point to AM4 and Bristol Ridge APU's (excavator based) supposedly releasing around March/April, i wonder if this is a small sample/preview of some (slightly) beefier chips that will come out then.
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post #12 of 147
Quote:
Originally Posted by Petykemano View Post

These chips are true Carrizo chips (2MB L2) that I suppose couldn't make it to fit into 35W TDP.

Long time lurker, I see? wink.gif

You probably aren't that far off the mark. Excavator is like AMD's version of Broadwell: designed primarily for low-power and embedded systems. But, at its core, it's still a modified version of good ol' Bulldozer. It's an APU that ran hot and had faulty graphics.

Quote:
Originally Posted by tpi2007 View Post

It seems that they really want to differentiate it from the higher end Steamroller based APUs. Cutting PCIe lanes from 16 to 8 seems like that extra step to make it clear, when not even the dual core 7470K gets that treatment.

I suspect that's due to Carrizo being Carrizo and not to differentiate the new SKU. Does anybody know how many lanes full Carrizo supports? It's a SoC for low-power laptops, so I'm not really sure it needs anything.

And I'm not kidding about the SoC part. It's one step beyond an APU: the CPU, the FPU, the memory controller, the northbridge, and even a cut-down version of the southbridge are all integrated onto a single die. Compare this to Intel's Core M where the southbridge is a separate die, albeit on the same package. Compare it to LGA-115# platforms and AMD's prior FM chips where the southbridge is a separate die. Compare it to Intel's LGA-2011 chips where there is no GPU. Then compare it to Intel's LGA-1366 and AMD's AM3+ and earlier where the northbridge isn't even on the die. There's been a lot of integration of a lot of components in just a few years.
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post #13 of 147
Benchmarks?
post #14 of 147
Quote:
Originally Posted by ku4eto View Post

I second that.
Also, no L3 cache?
No FM2/FM2+ Athlons have L3. APU parts didn't have room for it on the die. And truth be told, the L3 on all K15h uarch parts is so slow and with such high latency that its usefulness is limited anyway. It made more of a difference on Phenom II as compared to K10 Athlons.

I suspect that these parts are nothing more than AMD's way of getting rid of mobile Carrizo chips that have flaws in the GPU section. It's not hard to put them in a desktop package and sell them as Athlons, and they'll probably all go 3.5/3.8 if you're willing to run them in a 65W thermal envelope. For people who are concerned with performance, getting desktop Godavari (870K) available somewhere other than China would be better.
     
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post #15 of 147
Quote:
Originally Posted by jsc1973 View Post

No FM2/FM2+ Athlons have L3. APU parts didn't have room for it on the die. And truth be told, the L3 on all K15h uarch parts is so slow and with such high latency that its usefulness is limited anyway. It made more of a difference on Phenom II as compared to K10 Athlons.

I wonder why Amd never built 6-8 core "Athlons" (no L3, no Igp ) from SR or XV. Those chips would have been cheap, being smaller than an apu or a Vishera, yet bringing the performance of a vishera.
post #16 of 147

Can't wait to see benchmarks.

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post #17 of 147
Quote:
Originally Posted by jsc1973 View Post

No FM2/FM2+ Athlons have L3. APU parts didn't have room for it on the die. And truth be told, the L3 on all K15h uarch parts is so slow and with such high latency that its usefulness is limited anyway. It made more of a difference on Phenom II as compared to K10 Athlons.

I suspect that these parts are nothing more than AMD's way of getting rid of mobile Carrizo chips that have flaws in the GPU section. It's not hard to put them in a desktop package and sell them as Athlons, and they'll probably all go 3.5/3.8 if you're willing to run them in a 65W thermal envelope. For people who are concerned with performance, getting desktop Godavari (870K) available somewhere other than China would be better.

I compared Athlon X4 vs PII and really L3 does not make much difference.
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post #18 of 147
Thread Starter 
If it OC ~ 4,5GHZ+ would mach lower clocked Core i5 CPU's. Great opton for FM2 users that use discrete graphics. thumb.gifthumb.gif
post #19 of 147
Quote:
Originally Posted by Pro3ootector View Post

If it OC ~ 4,5GHZ+ would mach lower clocked Core i5 CPU's. Great opton for FM2 users that use discrete graphics. thumb.gifthumb.gif

i3 6100 would still crush it though.
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post #20 of 147
Quote:
Originally Posted by ZealotKi11er View Post

i3 6100 would still crush it though.

I wasn't aware that the 6100 was $75. What a steal!
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