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  1. S

    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    I think you're right. I remember reading somewhere that the RX480 was supposed to have the VR performance of a 500$ card however.... (before clicking submit) Found it here: http://www.amd.com/en-us/press-releases/Pages/radeon-rx-480-2016may31.aspx I don't believe it currently has...
  2. S

    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    I haven't experienced such a large variability myself. Since the benchmark aggressively changes rendering quality depending on system load, it could be that CPU spikes caused by something else (e.g. the operating system's power management setting and background programs) affect the score more...
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    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    Nevertheless, I found it relatively consistent in roughly gauging the videocard's suitability for VR. An increase of ~0.8 in score through overclocking with the R9 390 I used for a brief period would indeed result in an overall better VR experience. I find a bit concerning that while the RX480...
  4. S

    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    The SteamVR Performance Test score is based primarily on the videocard's capability of keeping the framerate above 90 fps. The 3D engine used by the benchmark will also try changing the rendering quality (including the internal rendering target resolution) adaptively to reach the 90 fps target...
  5. S

    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    It looks like gasolina is using the ones that were bundled with the GPU. A different user tried them out and couldn't make them work with his AMD Fury X: http://www.techpowerup.com/forums/threads/rumor-rx480-aib-card-leaked-and-tested.223351/page-22#post-3479028 It's true that the driver...
  6. S

    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    I've used a non-X R9 390 for a short period on a weaker CPU than user gasolina, and I had better scores on the same benchmark with stock clocks. Overclocking would bring the card to R9 390X level. There are suggestions that the RX480 might indeed only have 32 ROPs, I wonder if this is having an...
  7. S

    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    A guy on TPU Forums received an RX480 in advance and while it does seem to perform well in Batman Arkham Knight (390X level, at least at 1080p), it doesn't seem to exactly have thrilling VR performance. Check out the posts on the last few pages by user gasolina...
  8. S

    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    ~110W might be hitting the default (0%) power limit. I remember others reporting about a similar power consumption.
  9. S

    AMD Polaris Thread: Radeon RX 480, RX 470 & RX 460 launching June 29th

    According to the previous screenshot voltage is 1150mV @ 1266 MHz, isn't this a bit high compared to the GTX 1070/1080?
  10. S

    850 wear leveling

    (the message was edited, but I'm keeping the reply here as it could be useful as a general information) On Samsung SSDs the normalized value ("Current" from CrystalDiskInfo as in the previously posted screenshot) shows wear as a percentage, while the raw value as the number of P/E cycles...
  11. S

    Samsung 850 Pro: TLC or MLC?

    3-bit MLC means "TLC". 2-bit MLC is what is popularly defined as "MLC". I wonder why they just aren't called 2LC, 3LC, 4LC and so on, that would be clearer in my opinion :hmm:
  12. S

    850 wear leveling

    This means that your SSD performed on average 1 program erase cycle out of 2000 on its NAND memory blocks. I would start worrying in 500 years.
  13. S

    8 vs 16 Gigs Of Ram?

    You're getting them because you disabled or severely limited your pagefile.
  14. S

    800GB of writes in 2 months with page file disabled? (SSD)

    I relatively often used hibernation in Windows 7 and 8 and measured the impact on host writes from SMART data every time I did it and I've never observed such a high amount of writes from it. The feature doesn't write the entire RAM content to the drive, and the compression it uses (which is...
  15. S

    800GB of writes in 2 months with page file disabled? (SSD)

    I would say yes. Have you realized that 2% in 6 months means 100% in 25 years? Hibernation only writes, after compressing it, the ram that is actively in use, excluding caches. So, if at any time your system is using 3 GB of ram, chances are that it will write 1 GB or so, perhaps even less, if...
  16. S

    Any in-depth testing to see if 850 Evo is really not prone to degradation (edited)

    I think this is wrong. I've experienced performance degradation on my 120GB and 250GB 1st gen Samsung 840 SSDs in much less time than that. I'll try performing a benchmark with HDTune later on a 840 250GB which had a Windows installation cloned on about a month ago and post results here. I...
  17. S

    Synthetic benchmarks for Linux?

    I've recently started using Linux and I noticed a general lack of SSD-specific synthetic benchmarks that are easy to use and do not involve fiddling with the command line. After investigating a bit I found out that there's a highly configurable benchmarking utility called FIO (Flexible IO...
  18. S

    Windows DOES defrag your SSD (article).. i don't get it

    Windows 7 will never defrag SSDs. However, Windows 8/8.1/10 will in some cases. This happens during the first maintenance window after installing the operating system for the first time, and very roughly, about once a month, regardless of the optimization interval set in the defragment/optimize...
  19. S

    The Destroyer chart with SSDs?

    According to its SMART parameters however, it looks like it's got NAND memory rated for 2000 P/E cycles. See: http://media.www.cdrinfo.com/Sections/Articles/Sources/C/Crucial%20BX100%201TB%20SSD/Tests/Snap15.jpg "168 - Max Erase Count of Spec"
  20. S

    840 EVO demise

    Thing is, wear leveling doesn't seem to occur at all on static data under normal conditions. I've tested this on one of my 840. I had several tens GB of static data stored there for a couple months, then I disabled trim, and tried again using the drive normally for a few more weeks (as a sort of...
  21. S

    Techreport's SSD endurance trial is over

    As far as I understand, after a more in-depth look and performing quick calculations, their endurance test was tailored to cause a low write amplification. TRIM was presumably also enabled. More OP wouldn't have helped significantly, if even at all. Besides, the number of P/E cycles one can...
  22. S

    Techreport's SSD endurance trial is over

    I don't think sector reallocation is necessarily a bad thing, unless it's due to uncorrectable errors. There have been suggestions that to keep the write amplification as low as possible, static wear leveling on TLC-equipped Samsung 840 SSDs is performed very conservatively. Since those sectors...
  23. S

    Techreport's SSD endurance trial is over

    Large sequential writes have a generally low write amplification, which means that the drive should last more; in theory at least, since they don't mention how many P/E cycles have been performed or what was the overall write amplification, so it's up to anybody's guess. This is why I've often...
  24. S

    Upgrading to SSD question/s

    On Windows you can disable trim through a command line statement if you want, but there aren't many reasons why one would want to do so except perhaps debugging or improving data recoverability.
  25. S

    [TR] SSD endurance experiment ends at 2.4 PB

    Putting the data retention issue aside (although at the rated P/E limit which all SSD can reach it's supposed to be at least 1 year of time for consumer drives) I can't really take write endurance tests seriously when the write amplification isn't also taken into account. It can be misleading to...
  26. S

    Samsung 850EVO owners... read speed okay?

    Why are people assuming it's a data retention problem, that of Samsung 840/840 EVO SSDs? Has anybody lost data yet because of this issue when their drive was turned off? I'm more inclined to think that since JEDEC doesn't specify a minimum performance level that the drive has to maintain to...
  27. S

    your 240GB SSD has 223GB.

    Space was not "lost to formatting". It wasn't there to begin with. 240GB = 240,000,000,000 bytes 240,000,000,000 bytes / (1024^3) = 223.52 GiB. http://en.wikipedia.org/wiki/Gibibyte
  28. S

    Samsung 850EVO owners... read speed okay?

    The confusing thing (for most people) is that on consumer SSDs the TBW rating is most often not related with actual NAND endurance. For that one should check out internal wear parameters (ie the amount of depleted P/E cycles). On those where the manufacturer's TBW rating actually has something...
  29. S

    Crucial MX100 vs. Samsung 850 EVO

    There have been reports of failing NAND on those SSDs: http://forums.sandisk.com/t5/SanDisk-Extreme-Pro-SSD/Sandisk-Extreme-Pro-240GB-7-retired-blocks-in-one-month/td-p/335531 http://forums.sandisk.com/t5/SanDisk-Extreme-Pro-SSD/6-month-old-SSD-extreme-pro-with-increasing-bad-sectors/td-p/337657
  30. S

    Is there any way to fix the Sarmsung 840?

    Making a system image and writing it back to the SSD works too, with the added benefit that you're backing up your data somewhere in the process.
  31. S

    Crucial MX100 vs. Samsung 850 EVO

    Yep, although keep in mind I really mean about that to start degrading in two weeks of time (=> drops in sequential read speed from HDTune occurring always in the same LBA ranges where static data lie), not reaching significant levels of degradation.
  32. S

    Crucial MX100 vs. Samsung 850 EVO

    By the way, on my non-EVO Samsung 840 250GB, which has had 93 P/E cycles performed on average so far, it takes about two weeks of time (on a PC powered on 24/7) for sequential read speed on static data to start degrading.
  33. S

    Crucial MX100 vs. Samsung 850 EVO

    Another possibility could be that Samsung "cheated" with their 19nm and 21 nm planar TLC NAND, which could be what allowed them to use it on their consumer SSDs much before other first-party manufacturers. What if these SSDs are actually working as intended and can only reliably show fast read...
  34. S

    SSD.. why garbage collection isn't as good as TRIM

    Sandforce-based drives perform data compression, which means that they write on their memory less data than the user requests. This lowers the write amplification and ultimately, NAND wear to a level which makes it irrelevant in practice whether TRIM is enabled or not. I seem to remember they...
  35. S

    SSD.. why garbage collection isn't as good as TRIM

    On many SSDs it takes more than 30 minutes to recover most of their speed through GC after thrashing them with writes. Eventually (on non-Sandforce ones), after a few hours of idling or light usage they will recover most of their write speed. I wouldn't call filling them two times their capacity...
  36. S

    Do Samsung 840 Evo or Crucial MX100 have a trim tool to uphold performance on VISTA?

    By the way, I just recalled that Samsung Magician (Samsung's SSD supporting software toolbox) has a "Performance Optimization" feature which enables Windows XP and Windows Vista users to send TRIM commands on the drive's free space, even though these operating systems do not natively support TRIM.
  37. S

    Do Samsung 840 Evo or Crucial MX100 have a trim tool to uphold performance on VISTA?

    This was probably true for old generation SSDs, but it looks it's not the case with modern ones. It appears they're smart enough to figure where is the data in most cases. To test this I tried to disable TRIM on purpose on my SSDs for a prolonged amount of time under Windows 8.1 (more than a...
  38. S

    Do Samsung 840 Evo or Crucial MX100 have a trim tool to uphold performance on VISTA?

    I can attest through extensive testing on my own SSDs that unless you are performing sustained writes rather frequently, you would be hard pressed to tell whether there's a difference between having and not having TRIM enabled. Write amplification will get higher during high stress usage cases...
  39. S

    Can I trust the new OCZ?

    @coercitiv: in the edited part, after giving a more detailed look at the data, I concluded that actually those SSDs fared better than I thought, although not as much as I would expect from premium Toshiba MLC NAND. Perhaps the latest "critical" firmware update for OCZ ARC100 SSDs improves error...
  40. S

    Can I trust the new OCZ?

    322 TB doesn't seem much for an endurance test made of sequential writes at a write amplification close to 1.0x, even if we're speaking of a 120GB model. But since the test was made on 240GB model, the that seems on the low side for an SSD to suddenly die. EDIT: seeing SMART data in some of the...
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