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Yeah, crossfire (and sli) have all sorts of issues, but it seems like with current APIs, AFR is about the best they can manage. And AFR with different cards is bad for obvious reasons. From what I could understand the dx12 change, it doesn't really see an extra gpu, instead it just sees an extra 1000 or whatever your gpu has processors. How this will work in practice with the gpu ram split between the cards remains to be seen, but if people can make engines that exploit this efficiently, multi gpu might end up being better than single gpu in pretty much every way.
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May 1, 2015 18:01
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Darkpriest667 posted:What version of VLC is it? Was the reinstall the newest version? I know the last two Nvidia drivers have given me some driver failures when I was doing certain things. ELITE keeps crashing unless you downclock to like 1100Mhz on a 980 SC. Apparently boost clocks on the maxwell cards don't play nice with some things I am finding out. I think there is a way to force a constant clock and disable the boost and the energy saver, but I've been so busy the last 3 weeks I haven't had the chance to look. It's the latest 64 bit release, not sure of the version number (not on the actual computer right now). I just reduced my OC on my GPU via Precision X as I had actually increased it recently, so perhaps that is what's been causing instability.
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May 1, 2015 18:17
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Truga posted:From what I could understand the dx12 change, it doesn't really see an extra gpu, instead it just sees an extra 1000 or whatever your gpu has processors. How this will work in practice with the gpu ram split between the cards remains to be seen, but if people can make engines that exploit this efficiently, multi gpu might end up being better than single gpu in pretty much every way. If DX12 is anything like Mantle (and it probably is), it's actually the exact opposite. Under Mantle the engine sees each GPU as a completely distinct entity much like how OpenCL or CUDA do things. Each GPU has its own command queue and any VRAM allocation only exists on one card, so the engine is responsible for splitting up the work and combining the results by issuing GPU-GPU memory copies. They might use simple methods like AFR or something more clever where each card does different tasks, causing less duplication across the cards VRAM and allowing higher utilization than SLi/CF did. So... DX12 might be amazing for multi-GPU but it depends. Implementations will range from "efficiently splits between GPU and IGP" to "chokes if the GPUs aren't matched" to "only uses the first GPU  "
repiv fucked around with this message at 19:03 on May 1, 2015 |
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May 1, 2015 18:36
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Turns out my Titan X is not in fact capable of running a 50% overclock  Started having issues and had to go back to the stock bios. Oh well, it's not like I'm really giving it more than it can handle with SW:ToR. Kind of sad though, as it ran perfectly fine for 3 weeks before starting to have driver crashes. Temps are perfectly reasonable at 40c, but I guess it still has too many voltage locks.
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May 1, 2015 19:10
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hmmm, should probably get another one then
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May 1, 2015 19:27
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THE DOG HOUSE posted:hmmm, should probably get another one then same
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May 1, 2015 20:07
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repiv posted:So... DX12 might be amazing for multi-GPU but it depends. Implementations will range from "efficiently splits between GPU and IGP" to "chokes if the GPUs aren't matched" to "only uses the first GPU The more practical use would probably be to use the IGP for compute tasks like physics or building indirect draw lists freeing up the discrete card to focus on rendering.
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May 1, 2015 23:32
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The_Franz posted:The more practical use would probably be to use the IGP for compute tasks like physics or building indirect draw lists freeing up the discrete card to focus on rendering. This is what I want to happen. igpu runs opencl well enough for basic physics these days.
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May 1, 2015 23:39
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I guess showing off comparisons with MOBAs is all the rage these days: https://www.youtube.com/watch?v=sV9aa_12Ap0 If anyone knows of a better source video fire away
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May 2, 2015 00:47
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I'm thinking about picking up another GTX 970 to SLI with for the Witcher 3, however the original card I have is one of those aftermarket overclocked ones (Zotac GeForce GTX 970 AMP Extreme Edition 4 GB GDDR5 PCI). Do I have to get the exact same card, or will a stock GTX 970 be compatible in SLI with my card?
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May 2, 2015 16:56
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Any 970 will work, but if the factory overclocks are different they will both run at the speed of the slower card by default.
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May 2, 2015 17:00
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More specifics on how DX12 multi-adapter works. tl;dr there's three modes developers can use: Implicit: Game sees one GPU, driver handles all load splitting as with SLi/CFX. Still requires driver profiles for good performance. Explicit Linked: Game sees a single psudo-GPU with multiple command queues and memory pools, each card can seamlessly access the others RAM over the SLi/CF bridge or XDMA. Explicit Unlinked: Game sees completely independent GPUs, allows mis-matched combinations like discrete+IGP or AMD+nVidia. Cross-GPU memory copies have to make a slow round-trip via the CPU. So don't go mixing AMD and nVidia cards in your machine just yet, games that actually support that won't be the norm 
repiv fucked around with this message at 15:06 on May 5, 2015 |
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May 5, 2015 14:45
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I gather the norm is gonna be a combination of intel HD and AMD or nvidia?
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May 5, 2015 16:40
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If they use Explicit Unlinked at all, it will be IGP+GPU yes. Nobody is going to buy AMD+NV setups until games can use it, and no developer is going to pay the performance penalty over Explicit Linked unless many users have mixed-vendor setups. Never going to happen IMO.
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May 5, 2015 16:52
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Especially with stuff like nvlink advantaging same-vendor multigpu setups.
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May 5, 2015 16:57
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The whole aspect of this mixed GPU stuff under DX12 doesn't make a whole lot of sense when nvidia are the dominant graphics vendor though, they're actively hostile to competition. I kinda feel like nvidia would put poo poo in their drivers to handicap or outright disable AMD cards under those multi adapter conditions. It just seems like something they'd do.
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May 5, 2015 17:27
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cat doter posted:The whole aspect of this mixed GPU stuff under DX12 doesn't make a whole lot of sense when nvidia are the dominant graphics vendor though, they're actively hostile to competition. I kinda feel like nvidia would put poo poo in their drivers to handicap or outright disable AMD cards under those multi adapter conditions. It just seems like something they'd do.
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May 5, 2015 17:36
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Given that pretty much everyone has iGPUs, though, if nVIDIA doesn't make their cards play nice AMD could always implement it as an incentive to go red over green.
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May 5, 2015 18:15
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Microsoft can just tell them to cut it out for WHQL certification if they try any shenanigans. Trying to get decent frame pacing with mis-matched discrete GPUs is problematic enough that nVidia shouldn't need to deliberately hinder it though 
repiv fucked around with this message at 18:54 on May 5, 2015 |
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May 5, 2015 18:44
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Darn, a new Nvidia bundle and I just got mine a couple weeks ago. Ah well, I already have more games than I have time for anyways.
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May 5, 2015 22:35
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Wow if those were two games you were going to buy anyways then drat thats a deal
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May 5, 2015 23:19
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repiv posted:Explicit Linked: Game sees a single psudo-GPU with multiple command queues and memory pools, each card can seamlessly access the others RAM over the SLi/CF bridge or XDMA. That's what I mean the other day. I guess it's confirmed now.
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May 5, 2015 23:28
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cat doter posted:The whole aspect of this mixed GPU stuff under DX12 doesn't make a whole lot of sense when nvidia are the dominant graphics vendor though, they're actively hostile to competition. I kinda feel like nvidia would put poo poo in their drivers to handicap or outright disable AMD cards under those multi adapter conditions. It just seems like something they'd do. Making laptop hybrid stuff work will be a lot easier in this model I think. It's a fragile nightmare of shimming and trickery right now, and even if the content isn't programmed against it things should be better with the improved driver model. Having the IGP do an AA pass once it's been given the frame for scan-out could be a nice win. (I wonder if you could fake gsync that way with the IGP resubmitting as needed, hmm.)
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May 5, 2015 23:47
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Glass of Milk posted:Darn, a new Nvidia bundle and I just got mine a couple weeks ago. Ah well, I already have more games than I have time for anyways. The new bundle is making me seriously consider a second 970 for sli, I need to crunch the numbers vs stepping up to a 980 or possibly a 980ti. There have been hints about something dropping this week from some press.
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May 6, 2015 00:18
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Glass of Milk posted:Darn, a new Nvidia bundle and I just got mine a couple weeks ago. Ah well, I already have more games than I have time for anyways. God dammit I literally bought my 970 on Sunday. Nm, Newegg was nice enough to hook me up. pr0zac fucked around with this message at 01:40 on May 6, 2015 |
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May 6, 2015 00:23
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That bundle is really making me consider getting a 970. I'm looking at this one http://www.amazon.com/MSI-GTX-970-GAMING-100ME/dp/B00TPLKR7Q/ref=cm_wl_huc_item is that a decent MSI one? It sort of sucks because I was planning on holding out until a consumer Vr headset is out and weigh my options then, but I was planning on getting these two games anyway. I have a 2gb 770 right now, so I'm assuming the difference won't be huge but it will probably help a bit in elite dangerous in Vr at least, right?
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May 6, 2015 07:17
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Poetic Justice posted:That bundle is really making me consider getting a 970. I'm looking at this one http://www.amazon.com/MSI-GTX-970-GAMING-100ME/dp/B00TPLKR7Q/ref=cm_wl_huc_item is that a decent MSI one? It sort of sucks because I was planning on holding out until a consumer Vr headset is out and weigh my options then, but I was planning on getting these two games anyway. I have a 2gb 770 right now, so I'm assuming the difference won't be huge but it will probably help a bit in elite dangerous in Vr at least, right? From what I recall you want the red 970 (the 4G) as all you get with this one is a backplate which is going to vanish if you ever need to RMA the card as it's a limited edition. Plus the 4g is cheaper by about 20 bucks.
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May 6, 2015 07:21
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Party Plane Jones posted:From what I recall you want the red 970 (the 4G) as all you get with this one is a backplate which is going to vanish if you ever RMA the card as its a limited edition. I thought someone mentioned the red was the older first run, and the other versions might be newer ( don't even know if that really matters)? Plus I don't mind spending the extra 15$ 20$ for the backplate either, really.
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May 6, 2015 07:23
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The backplate on my MSI 290 is actually pretty nice. Gives it more stability since it's a huge card and has some thermal tapes and pads attached for backside cooling. Probably not really necessary but after having cards sag over the years it's nice to have at least, and it looks a lot better than the 280X that lacked a backplate.
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May 6, 2015 07:33
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Poetic Justice posted:That bundle is really making me consider getting a 970. I'm looking at this one http://www.amazon.com/MSI-GTX-970-GAMING-100ME/dp/B00TPLKR7Q/ref=cm_wl_huc_item is that a decent MSI one? It sort of sucks because I was planning on holding out until a consumer Vr headset is out and weigh my options then, but I was planning on getting these two games anyway. I have a 2gb 770 right now, so I'm assuming the difference won't be huge but it will probably help a bit in elite dangerous in Vr at least, right? A 970 will be 20%-25% faster than the 770 at 1080p according to the benchmarks I've looked at, I'd expect that gap to widen over time due to increasing VRAM requirements.
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May 6, 2015 07:37
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Poetic Justice posted:That bundle is really making me consider getting a 970. I'm looking at this one http://www.amazon.com/MSI-GTX-970-GAMING-100ME/dp/B00TPLKR7Q/ref=cm_wl_huc_item is that a decent MSI one? It sort of sucks because I was planning on holding out until a consumer Vr headset is out and weigh my options then, but I was planning on getting these two games anyway. I have a 2gb 770 right now, so I'm assuming the difference won't be huge but it will probably help a bit in elite dangerous in Vr at least, right? I saw it and was about to pull the trigger when I realized my mobo supports crossfire, not sli. I was stupid and a "team red" buyer when I built it. I was positive I would only buy AMD cards forever. Are current motherboards supporting only one or the other or do they make most of the decent mobos with support for both? It's this http://www.newegg.com/Product/Product.aspx?Item=N82E16813131770 I really wish witcher 3 would hurry up and come out so I can see where my system stands. Im just looking for an excuse to upgrade. Fauxtool fucked around with this message at 07:48 on May 6, 2015 |
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May 6, 2015 07:45
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Neither crossfire or SLI need any form of licencing for motherboards. The only difference is that crossfire will run with the two cards at any PCI-E link speed, whereas SLI is limited to 8x or 16x links. As modern Intel CPUs have 16 PCIE lanes from the CPU, for a motherboard to support SLI it needs the additionally routing (more expensive) in the motherboard to run the slots at 8x/8x from the CPU. Ironically, this actually means that motherboards that only support crossfire are generally poor choices for crossfire, as they have the first slot at PCIE 3.0 16x and the second slot at PCIE 2.0 4x (an eight of the bandwidth) from the chipset. As the second slot is through the chipset, it shares the DMI link from the chipset to the CPU with the storage as well, so it can cause weird bottlenecks.
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May 6, 2015 07:58
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And if you *really* need the bandwidth, X99 can generally deliver quad 8x links. You may be in one or both of the "I have too much money and not enough sense" or "I have no financial planning and should not live on my own" categories if you are building something where you *need* quad PCIe 3.0 8x, though. That way leads madness (and a ridiculous power bill).
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May 6, 2015 08:19
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drat that's a nice 970 bundle, well played nVidia.
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May 6, 2015 09:44
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Of course I bought my computer a) just before they announced the first bundle (let alone this current one) and b) from the wrong retailer (since only one in Switzerland is part of the program), uncool guys 
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May 6, 2015 10:50
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In case you missed it, the Oculus Rift was announced to launch no earlier than Q1 2016 so please don't buy any hardware to 'prepare' for it. No specs or reqs afaik.
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May 6, 2015 13:03
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Poetic Justice posted:That bundle is really making me consider getting a 970. I'm looking at this one http://www.amazon.com/MSI-GTX-970-GAMING-100ME/dp/B00TPLKR7Q/ref=cm_wl_huc_item is that a decent MSI one? It sort of sucks because I was planning on holding out until a consumer Vr headset is out and weigh my options then, but I was planning on getting these two games anyway. I have a 2gb 770 right now, so I'm assuming the difference won't be huge but it will probably help a bit in elite dangerous in Vr at least, right? I just picked that one up a week ago when it was actually $5 cheaper than the red "gaming" edition version on Newegg after the rebate. FWIW the backplate is really nice looking. Hell of an upgrade from the old 6870 I had been using!
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May 6, 2015 14:50
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sauer kraut posted:In case you missed it, the Oculus Rift was announced to launch no earlier than Q1 2016 so please don't buy any hardware to 'prepare' for it. No specs or reqs afaik. If I was a betting man I'd say It'll be 1440p (likely a modified Samsung display) 90hz so my hardware recommendation is "lol".
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May 6, 2015 15:57
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My GTX980 arrived today, but I can't install it yet as I don't have a 6 pin -> 2 x 8 pin adapter  e: no wait I had one, new gpu installed! Sorbus fucked around with this message at 17:48 on May 6, 2015 |
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May 6, 2015 17:12
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I remember when the Oculus first looked like it was coming out nearly 2 years ago, they were talking up how a GTX 770 was the card you should be aiming for to get a quality gaming experience on it.
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May 6, 2015 17:13
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