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    Home Unlabelled Hardware support: [TechSpot] Nvidia Ampere vs. AMD RDNA 2: Battle of the Architectures

    Hardware support: [TechSpot] Nvidia Ampere vs. AMD RDNA 2: Battle of the Architectures

    December 07, 2020

    Hardware support: [TechSpot] Nvidia Ampere vs. AMD RDNA 2: Battle of the Architectures

    [TechSpot] Nvidia Ampere vs. AMD RDNA 2: Battle of the Architectures

    Posted: 06 Dec 2020 08:14 AM PST

    [TweakTown] AMD Radeon RX 6800 XT in mGPU: 2 x Big Navi GPUs = Insane Performance

    Posted: 06 Dec 2020 10:49 PM PST

    (VideoCardz.com) ASUS unveils Radeon RX 6900 XT graphics card

    Posted: 06 Dec 2020 06:41 PM PST

    An analysis of the $82 million eBay Scalping Market for Xbox, PS5, AMD, and NVIDIA

    Posted: 06 Dec 2020 10:28 AM PST

    RTX 3060ti Eagle OC impressions (for anyone interested in how 2 fan 2 slot cards like this perform)

    Posted: 06 Dec 2020 09:15 AM PST

    I thought maybe this would be of interest for anyone who has ordered a 3060ti eagle or any other similar 2 fan card:

    ​

    ​

    My frame of reference: Upgrading from an asus strix gtx 970, the quietest 970 model at just 29dba under load, with fans rarely going over 800 rpm.
    Personally I am allergic to fan noise.

    ​

    Initial impressions:

    • it's a shorter card than my old strix gtx 970, and much lighter.
    • The heatsink inside is wider but shorter, fans are larger and cover the heatsink better
    • 1 8 pin connector
    • a bright blue LED strip on the side which wasn't advertised, I don't like LED personally

    Out of the box settings, clocks, voltage, noise and performance:

    • Power limit was set to 200-210 watts (it also allows for up to 110 percent power limit as it's the OC model, we'll soon see why this is pointless)
    • It ran into power limits HARD out of the box, boost clock varied between 1800-1950 mhz
    • Voltage went up to about 1.1v
    • Power draw 200-205 watts in Timespy
    • It fan stop out of the box (so fans don't spin when temps are low or there is no load)
    • It has an insanely agressive fan curve out of the box (we'll soon see why)
      -> Fans sit at 90-95 fanspeed stock, which translates to 1800 ish RPM
      -> Fans and bearings seem decent as there is no annoying bearing or fan noise
      -> At this rpm they are however loud regardless and you can hear them moving a ton of air
    • Temps at about 58-61 celcius (we'll soon see why)

    Timespy gpu score all stock: 11797

    ​

    Undervolting and clockspeeds:

    200+ watts and these kinds of temps and noise for a 2 fan card are unacceptable to me, time to see what effect a custom voltage curve has.

    VRAM clock untouched to rule it out as a factor, fan curve untouched to normalize for noise.

    ​

    Voltage / memory / core clock / power draw / core temp /pass or fail / timespy score

    Power draw varied depending on which benchmark step, I tried to eye the average it in the second and most demanding benchmark part, so the number I list will be +-5 watts

    ​

    • 0.975v / 0+ mem / 1985mhz / 200watts / 60c / pass / 12085
    • 0.950v / 0+ mem / 1985mhz / 195watts / 58c / pass / 12296
    • 0.925v / 0+ mem / 1985mhz / 190watts/ 55c / fail

    Clockspeed scaling above 1900 mhz is kinda poor on ampere, so this was to be expected, time to lower the core clock.

    • 0.925v / 0+ mem / 1950mhz/ 190watts/ 55c /pass / 12166
    • 0.900v / 0+ mem / 1860mhz/ 175watts/ 50c / pass /11797
    • 0.875v / 0+mem / 1860mhz/ 160 watts/ 48c / pass / 11768

    At this point I felt like I got the power draw under control and I was starting to question if timespy was a good stability test, so I stopped here and ran some different benchmarks and games to verify stability.

    Timespy score dropped ever so slightly at this point, which suggests I was pushing it with the clockspeed at this voltage. Another good reason to stop here.

    RDR2, ff15, horizon zero dawn, bf5, hitman 2016 tested. Seems stable (we'll see later why)

    What stood out was that power draw in games was about 10-15 watts lower than in timespy.

    In zero dawn the power draw stayed around 130-135watts, gpu load temp dropped to 41 degrees and didn't budge from there.

    ​

    Preliminary conclusion:

    • With a 200watt power limit and default voltage settings this card ran into the power limit pretty hard, lowering the voltage to 0.975v made boost clocks a lot more stable without changing the core clock, and added about 2 percent to the score.
    • 2ghz clocks require too much voltage to be worth it, a 100mhz downclock allows a much lower operating voltage, which in turn lowers temps, which in turn makes it more stable. Boost clocks being more stable means you don't lose any performance over stock.
    • If all you want is reference performance then you can get it at <150 watts, at least with a halfway decent bin. Results may vary obviously, if you have a real stinker of a chip it's going to need all of that voltage that it comes with out of the box to hit 2ghz.

    ​

    Did some more testing at this point for the next 3 hours. No crashes, no weirdness, no framepacing issues.

    ​

    Fan curve, temps, noise and stability

    Ok time to introduce another variable, temperatures

    I set a custom fan curve that aimed for the 68-70 degrees that my old gtx 970 was running at.

    Tested it in a few games.

    Fanspeed: 700 rpm

    Temp: 70-71 celcius

    At this point it was more quiet than even my old gtx 970, I was happy, but cheered too soon.

    Benchmarked a few more games to verify temps and after a few minutes of RDR2 it crashed.

    Ok so fanspeed can be brought under control, but ampere does not like high temps.

    That would explain the stupid default fan curve that aimed for 60c at stock voltage.

    ​

    At this point I'm going to set a new fan curve that aims at 60c (hopefully under 1000rpm) and see if the voltage is stable at that temp. If not I'm going to have to do a lot of fiddling to decide on a performance/noise balance I'm happy at.

    Low hanging fruit would be another 50mhz cut in clockspeeds, aiming for 55c with fan curve and leaving it at that, a memory overclock would more than make up for the minor loss in performance. But I'm not going to touch memory till everything else is stable for a week.

    ​

    Will update as I learn more.

    submitted by /u/Finicky02
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    Podcast interview with a senior manager at ASML (EUV lithography machines).

    Posted: 07 Dec 2020 01:02 AM PST

    Details on AMD Navi 22, Navi 23 and Navi 24 mobile GPUs have been leaked - VideoCardz.com

    Posted: 06 Dec 2020 07:43 AM PST

    Do PCs-on-a-card exist?

    Posted: 06 Dec 2020 03:17 PM PST

    (Not sure which subreddit is appropriate)

    I was commenting on a YouTube video about the new ARM-based Macs and how they don't support booting up Windows. I mentioned that there were DOS/Windows emulators on Mac pre-X and pre-Intel. Examples were SoftWindows (sequel to SoftPC) and RealPC. Before that, I think there was one Mac with a PC Card in it so it could run DOS. Did that ever become a general thing; i.e. an entire PC on a PCI (or similar) card that was installed in another (probably not WinTel) computer? If so, do they still exist?

    submitted by /u/CTMacUser
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    Gigabyte GP-P550B Review - Affordable But What About Its Performance & Build Quality?

    Posted: 06 Dec 2020 08:43 AM PST

    You will find the full video/review of this cheap Gigabyte PSU here:

    https://youtu.be/_ummGb8U1RI

    As expected, an outdated platform and low performance in almost all sections.

    submitted by /u/crmaris
    [link] [comments]

    The end for ISA x86?

    Posted: 06 Dec 2020 06:51 AM PST

    I have very little knowledge in this area, but I find it to be a most interesting subject.

    Do you think the ISA CISC that AMD or Intel is using in their processors today has hit a performance cap per Watt? I ask myself this question seeing the impressive performance of the Apple M1 with a TDP of 10-15W. Or the x86 ISA still has a bright future ahead of it, and it's only AMD and Intel that have fallen behind?

    submitted by /u/ZachiZachou
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