4 ms·

Preorders for the 9900K are 578$ USD. For that you can get a Ryzen 2700X, a nice motherboard and a 256GB SSD. Performance delta shouldn't be more than 15% defi

Preorders for the 9900K are 578$ USD. For that you can get a Ryzen 2700X, a nice motherboard and a 256GB SSD. Performance delta shouldn't be more than 15% deficit for the Ryzen for a few specific games.

vinw 8y ago
Keep seeing this 'delta' word. From context it is basically like 'difference'. But is there a delta between difference and delta?
- berbec 8y ago
  Delta makes you sound smarter.
  - gameswithgo 8y ago
    it is less typing, and less data. save the planet.
    - dboreham 8y ago
      'd' works too, or did for Leibniz..
    - berbec 8y ago
      'Δ' must be a sign of Greenpeace membership, then.
      - marvin 8y ago
        Only if you've memorized how to type it. If you have to Google it beforehand, it serves as cheap signaling at best and an environmental transgression at worst.
  - holstvoogd 8y ago
    #iamverysmart
    - umvi 8y ago
      Speaking of reddit, there is a subreddit called /r/changemyview where you can award deltas (Δ) to people that have changed your view or provided a particularly compelling insight.
- Geforce8472 8y ago
  'difference' can be subjective, 'delta' is a measurement of an amount of difference.
- neolefty 8y ago
  It comes from mathematical writing — the greek letter delta ∆ is often a variable used for the difference between two values. So maybe you could translate it as "quantified difference".
- Symmetry 8y ago
  'Delta' has connotations of being quantitative that 'difference' doesn't have.
- Covzire 8y ago
  Delta = numerical comparisons only, or at least that's the only context I've ever seen delta used in.
gameswithgo 8y ago
If you have a program that uses AVX instructions much the delta will hit ~2x
- nalllar 8y ago
  AVX512 on downclocks, you won't see the full 2x scaling. Cloudflare ran into some trouble with this: https://blog.cloudflare.com/on-the-dangers-of-intels-frequency-scaling/ https://blog.cloudflare.com/on-the-dangers-of-intels-frequen...
  - gameswithgo 8y ago
    AVX512 would be ~4x, but this intel CPU doesn't have it. AVX2 is ~2x, Ryzen/AMD fakes AVX2 instructions with multiple SSE instructions. Some AVX2 instructions downclock but not much, I see very close to 2x speedup over SSE2 with some workloads. Some of the downclock loss is made up for because there are more instructions available (gather, etc) AVX512 might hit more than 4x improvement over SSE on some workloads despite the downclocks, due to all of the masking features. I have seen results consistent with this, 2nd hand. (I don't own an AVX512 cpu) Anyway all of these things depend on workload, cpu, compiler etc. But it does happen!
    - dragontamer 8y ago
      > AVX512 would be 4x AVX2 is 2x, Ryzen fakes AVX2 instructions with multiple SSE instructions. Not quite. Everything is fake, because everything is encoded into micro-ops first. Ryzen's internal micro-op engine is 128-bit wide. But it has 4x pipes... each handling 128-bits at a time. So any 256 bit instruction will simply use two-pipes at a time. ------- So the 256-bit instruction does in fact, execute at once. The difference is that Intel has 3-pipelines, each of which can do a 256-bit instruction by itself. ------- In effect: Ryzen is 4x128-bit pipelines, with the ability to merge pipelines together to do a 256-bit instruction. Intel is 3 x 256-bit pipelines, with the ability (on Skylake-X) to merge pipelines together to do a 512-bit instruction In any case, Intel has wider pipes than Ryzen. Intel Skylake is effectively a 256-bit CPU, while Ryzen is only a 128-bit CPU.

vinw 8y ago

Keep seeing this 'delta' word. From context it is basically like 'difference'. But is there a delta between difference and delta?

berbec 8y ago
Delta makes you sound smarter.
- gameswithgo 8y ago
  it is less typing, and less data. save the planet.
  - dboreham 8y ago
    'd' works too, or did for Leibniz..
  - berbec 8y ago
    'Δ' must be a sign of Greenpeace membership, then.
    - marvin 8y ago
      Only if you've memorized how to type it. If you have to Google it beforehand, it serves as cheap signaling at best and an environmental transgression at worst.
- holstvoogd 8y ago
  #iamverysmart
  - umvi 8y ago
    Speaking of reddit, there is a subreddit called /r/changemyview where you can award deltas (Δ) to people that have changed your view or provided a particularly compelling insight.
Geforce8472 8y ago
'difference' can be subjective, 'delta' is a measurement of an amount of difference.
neolefty 8y ago
It comes from mathematical writing — the greek letter delta ∆ is often a variable used for the difference between two values. So maybe you could translate it as "quantified difference".
Symmetry 8y ago
'Delta' has connotations of being quantitative that 'difference' doesn't have.
Covzire 8y ago
Delta = numerical comparisons only, or at least that's the only context I've ever seen delta used in.

gameswithgo 8y ago

If you have a program that uses AVX instructions much the delta will hit ~2x

nalllar 8y ago
AVX512 on downclocks, you won't see the full 2x scaling. Cloudflare ran into some trouble with this: https://blog.cloudflare.com/on-the-dangers-of-intels-frequency-scaling/ https://blog.cloudflare.com/on-the-dangers-of-intels-frequen...
- gameswithgo 8y ago
  AVX512 would be ~4x, but this intel CPU doesn't have it. AVX2 is ~2x, Ryzen/AMD fakes AVX2 instructions with multiple SSE instructions. Some AVX2 instructions downclock but not much, I see very close to 2x speedup over SSE2 with some workloads. Some of the downclock loss is made up for because there are more instructions available (gather, etc) AVX512 might hit more than 4x improvement over SSE on some workloads despite the downclocks, due to all of the masking features. I have seen results consistent with this, 2nd hand. (I don't own an AVX512 cpu) Anyway all of these things depend on workload, cpu, compiler etc. But it does happen!
  - dragontamer 8y ago
    > AVX512 would be 4x AVX2 is 2x, Ryzen fakes AVX2 instructions with multiple SSE instructions. Not quite. Everything is fake, because everything is encoded into micro-ops first. Ryzen's internal micro-op engine is 128-bit wide. But it has 4x pipes... each handling 128-bits at a time. So any 256 bit instruction will simply use two-pipes at a time. ------- So the 256-bit instruction does in fact, execute at once. The difference is that Intel has 3-pipelines, each of which can do a 256-bit instruction by itself. ------- In effect: Ryzen is 4x128-bit pipelines, with the ability to merge pipelines together to do a 256-bit instruction. Intel is 3 x 256-bit pipelines, with the ability (on Skylake-X) to merge pipelines together to do a 512-bit instruction In any case, Intel has wider pipes than Ryzen. Intel Skylake is effectively a 256-bit CPU, while Ryzen is only a 128-bit CPU.