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  1. W

    Discussion Speculation: Zen 4 (EPYC 4 "Genoa", Ryzen 7000, etc.)

    Sunny Lake in addition to Port 5 512-bit unit can combine the units of Port 0 and 1 into a second AVX-512 unit.
  2. W

    Discussion Speculation: Zen 4 (EPYC 4 "Genoa", Ryzen 7000, etc.)

    Zen 1 has 64KB of L1 instruction cache instead of 32KB that the rest of the line has.
  3. W

    Question Alder Lake - Official Thread

    I'm certain that they mixed up the score with the 5950x.
  4. W

    News AMD Q3 Earnings Results

    AMD doesn't have any long-term debt (the last notes are due in less than a year). If they need the cash in the future they can just borrow it.
  5. W

    Question What's preventing AMD and Intel from widening their pipelines?

    It's pretty clear that both Intel and AMD are going to rely on op Caches to bypass x86 decoder limitations. (Intel even calls the x86 decoders as the "Legacy Decode Pipeline").
  6. W

    Question Should Intel or AMD break backward compatibility and do a clean x86-64 reboot?

    I'll note that SSE5 was never adopted rather it was separated into XOP, FMA4, and F16C with the first 2 deprecated by AMD while the last one was adopted by both Intel and AMD.
  7. W

    Question Should Intel or AMD break backward compatibility and do a clean x86-64 reboot?

    To me the obvious path forward is with large op-caches after all the caches in the Zen architectures can already issue 8 decode instruction per clock. Wouldn't be surprised if Zen 4 went to 16K op cache and maybe even cut back on the x86 decoders.
  8. W

    Question Should Intel or AMD break backward compatibility and do a clean x86-64 reboot?

    They don't want to do that because Intel and AMD want the freedom to change the internal ISA for optimization purposes.
  9. W

    Question Bloomberg: Apple testing SoCs with 16 and 32 high performance cores

    https://forums.macrumors.com/threads/mac-mini-m1-h-265-encoding.2269815/post-29332887 https://forums.macrumors.com/threads/mac-mini-m1-h-265-encoding.2269815/post-29347040
  10. W

    Question Bloomberg: Apple testing SoCs with 16 and 32 high performance cores

    Seems to be the consensus that the M1 hardware encoders produce mediocre output compared to software which is pretty much consistent with most non-professional hardware encoders. The casual user who going to encode their videos is going to get much value going from their camera/phone's hardware...
  11. W

    Discussion Speculation: Zen 4 (EPYC 4 "Genoa", Ryzen 7000, etc.)

    Backlogs aren't uncommon in capital intensive industries. For example when the 787 backlog fell to 546 planes or about a 3 year backlog Boeing responded by slashing production. ASML backlog in contrast looks to be just 2 years.
  12. W

    Discussion Apple Silicon SoC thread

    x86-64 has 16 Vector registers. The EVEX prefix that was introduced alongside AVX-512 extends that to 32.
  13. W

    Discussion Apple Silicon SoC thread

    Here's a laptop with 3950x which is a full size desktop processor. https://www.eurogamer.net/articles/digitalfoundry-2020-xmg-apex-15-review-ryzen-9-3950x-in-a-laptop
  14. W

    Discussion Apple Silicon SoC thread

    We have our first M1 Cinebench R23 courtesy of Bits and Chips. 990 CPU encoders usually produce better quality output than hardware encoders. I occasionally do a bit of encoding an I use x264.
  15. W

    Discussion Apple Silicon SoC thread

    The Zen 3 review noted that the prefetchers managed to foil the TLB+CLR thrash test which is designed to bypass prefetchers so better prefetchers are pretty debatable. Also something to note while Apple's cache has great latency they lag quite a bit in bandwidth. In fact clock for clock Zen 2 L2...
  16. W

    Discussion Apple Silicon SoC thread

    I'll note that on the SIMD floating point/integer side AMD and Intel still has a significant advantage due to vector size and cache bandwidth.
  17. W

    Discussion Apple Silicon SoC thread

    There are lots of lower scoring 4900HS so I suspect users are playing around with TDP. The higher scoring 4900HS go up 1200 Single and around 8000 Multi.
  18. W

    Apple A12 & A12X *** Now A12Z as well *** Now in a Mac mini

    Not surprising at all as x264 and x265 have a ton of assembly code for x86.
  19. W

    Radeon 4850 without 6 pin connector ok for 2D?

    That was only true for 4870 cards because they didn't downclock the GDDR5 memory at idle because it would briefly cause on-screen corruption when the memory clock changed. That wasn't a problem with the 4850 because it used GDDR3 (and one card from Sapphire used GDDR4) which could downclock.
  20. W

    [THW] Review Samples vs Retail R9290x boards(large differences)

    The HD 5870 ref HSF is considerably different from the R9 290X HSF.
  21. W

    NV 780 GTX buyers remorse from AMD 290X card

    It's only about 40-50W higher in average system power consumption over a stock 780 so likely you're OC 780 ACX is in the same ballpark as R9 290x heatwise, and I wouldn't be surprised if it was actually higher.
  22. W

    R260/270/280/290/290x Review thread

    It's pretty clear that the card settles into an equilibrium, and also note that most reviewers perform multiple runs per benchmark which is important since CPU and GPU have boosts that are non-deterministic. Also note that there are no base clocks.
  23. W

    [Xbitlabs]AMD Excavator Core May Dramatic Performance Increases.

    Exactly how is AMD trying to bring attention to Excavator with a patch to a open-source programing tool? You're wrong about the Pentium Pro which introduced the P6 microarchitecture.
  24. W

    AMD Q313 Results

    The gain was worth $22 million to the bottom line.
  25. W

    AMD Q313 Results

    http://phx.corporate-ir.net/External.File?item=UGFyZW50SUQ9MjA2NTkwfENoaWxkSUQ9LTF8VHlwZT0z&t=1
  26. W

    HP OEM Radeon HD 8570 limited to 1929x1200?!?

    Your monitor probably doesn't have a built-in scaler, so in order to use any resolution other than 1280x800 or 2560x1600 you have to go into the Catalyst control panel and enable GPU scaling under My Digital Flat-Panels/Properties tab. However have you actually tried a dual-link DVI cable? My...
  27. W

    HP OEM Radeon HD 8570 limited to 1929x1200?!?

    DVI single and dual link connectors are different looking. http://en.wikipedia.org/wiki/Digital_Visual_Interface
  28. W

    HP OEM Radeon HD 8570 limited to 1929x1200?!?

    You are wrong about the Dual Link DVI, you do need dual link DVI 2560x1600.
  29. W

    Verizon cloud to design servers in partnership with AMD.

    If the Verizon is using Opteron then it's probably because for things like Memcached since the Opterons used by Seamicro have a capacity of 64GB while the Xeons have a capacity of 32GB. I also suspect that the ARM A57 will replace the Piledriver core for this purpose as well as the now outdated...
  30. W

    Verizon cloud to design servers in partnership with AMD.

    Some articles indicate that it's all Opteron, while others seem to suggest that it's a mix of Xeons and Opteron. Opteron's main advantage would be it's higher memory capacity over 1p Xeons. http://venturebeat.com/2013/10/07/verizon-builds-its-cloud-with-amd-micro-servers/ Even if they're...
  31. W

    The AMD Mantle Thread

    Is it really true though after all an nVidia warp is still 32 threads and a AMD wavefront is still 64 threads. Also the vibe I'm getting from the developers that are commenting about Mantle is that much of the benefit comes from having control over memory which is often a neglected aspect of...
  32. W

    The AMD Mantle Thread

    1. There's a big difference between the Glide, DX7/8 era and the current generation. If you're writing a shader during the Glide era you're basically writing ASM. Now you're writing with high level shading languages such as HLSL, GLSL, Cg, PSSL. 2. There's also far less games being made from...
  33. W

    AMD Radeon HD 9970 Specifications Leaked – Twice as fast as GTX 780 (ChipLoco rumor)

    I'm assuming that BF4 will be added to the Never Settle Gold tier so you can pick a different game if you choose to.
  34. W

    AMD Radeon HD 9970 Specifications Leaked – Twice as fast as GTX 780 (ChipLoco rumor)

    The chiphell poster appears to have stolen the pics from the Korean site that leaked the AMD ES card sample which now have benchmarks. http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fudteam.tistory.com%2F539&act=url
  35. W

    Skylake teaser...

    The PCH is mostly I/O which means that it's doesn't benefit that much from shrinks so using a separate chip allows Intel to use a older process node.
  36. W

    [Digitimes] AMD updates product roadmap for 2014 and 2015

    I'll assume it's for their SeaMicro line, and is aimed at customers who currently run virtualized servers on existing rack or blade servers.
  37. W

    Iris pro benchmarks are in, and........they're VERY GOOD

    I would seriously doubt that Intel would release sub-optimal release day drivers for BF3 and Skyrim games which have been released for almost 2 years AND are two of the most used benchmarks on review sites. On the topic of GDDR5 prices bkillian on the beyond3d has commented that cost of...
  38. W

    [AnandTech] Atom Z3770's Cinebench performance

    The Intel Optimization guide clearly states that instructions within each FP Reservation stations are schedule in-order, but instruction in different Reservation stations can be schedule out of order. i.e an later FADD instruction can go in front and earlier FMUL instruction.
  39. W

    Atom Z3370-D 3Dmark Cinebench11.5 etc

    I believe Cinebench uses scalar FP so Jaguar's increase in FP width isn't really a benefit in this application.
  40. W

    (8-17-13) AMD 9970 28nm vs. 20nm Poll

    Both of them are derived from the existing RV790 and RV770 generation, and if AMD really wanted to replace the HD 4770 with those chips they would have just have called them the HD 4770.
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