Monday, April 22nd 2013
AMD Radeon HD 7990 Clock Speeds and Core Config Confirmed, Tested
Ahead of its April 24 launch, AMD board vendors has been distributing marketing materials to their retail partners. One such retailer in Japan revealed the flagship graphics card's specifications sheet, revealing details such as clock speeds and GPU core configuration.
To begin with, AMD isn't compromising much on clock speeds on the HD 7990 "Malta," in an effort to lower power draw. The card features GPU core clock speed of 1000 MHz, which puts it above the single-GPU Radeon HD 7970, but not much lower than the Radeon HD 7970 GHz Edition, with its 1050 MHz. The memory is clocked at 6.00 GHz, on par with the HD 7970 GHz Edition, which yields a cumulative memory bandwidth of 576 GB/s.
Moving on to the core configuration, the Radeon HD 7990 "Malta" doesn't disable anything on the "Tahiti" silicon. It uses a pair of "Tahiti" chips, with 2048 stream processors each, 128 TMUs each, 32 ROPs each, and 384-bit GDDR5 memory interfaces, each. The card features a total of 6 GB of memory, 3 GB per GPU.
In another slide, AMD gave retailers performance numbers for the Radeon HD 7990 "Malta" from its own testing. The HD 7990 is pitted against GeForce GTX 690 and GeForce GTX TITAN, and the three cards were put through 3DMark "Fire Strike" in performance and extreme presets. In performance preset, the Radeon HD 7990 scored 16 percent higher than GeForce GTX 690, and 29 percent higher than the GTX TITAN. In the extreme preset, it kept the trend up, scoring 15 percent higher than the GTX 690, and 31 percent higher than the GTX TITAN.
Source:
Hermitage Akihabara
To begin with, AMD isn't compromising much on clock speeds on the HD 7990 "Malta," in an effort to lower power draw. The card features GPU core clock speed of 1000 MHz, which puts it above the single-GPU Radeon HD 7970, but not much lower than the Radeon HD 7970 GHz Edition, with its 1050 MHz. The memory is clocked at 6.00 GHz, on par with the HD 7970 GHz Edition, which yields a cumulative memory bandwidth of 576 GB/s.
In another slide, AMD gave retailers performance numbers for the Radeon HD 7990 "Malta" from its own testing. The HD 7990 is pitted against GeForce GTX 690 and GeForce GTX TITAN, and the three cards were put through 3DMark "Fire Strike" in performance and extreme presets. In performance preset, the Radeon HD 7990 scored 16 percent higher than GeForce GTX 690, and 29 percent higher than the GTX TITAN. In the extreme preset, it kept the trend up, scoring 15 percent higher than the GTX 690, and 31 percent higher than the GTX TITAN.
62 Comments on AMD Radeon HD 7990 Clock Speeds and Core Config Confirmed, Tested
If these are Tahiti chips like the ones used in the 7950 en 7970 series, they should have a lower texture and pixel fillrate at 1GHz.
I wonder what they did to the chip for this to be possible(two typos seem highly improbable to me, unless the table is fake ofc)
Edit: Humansmoke gave me the somewhat obvious answer :D
Pixel fillrate is Core freq * ROP count
7970 is 925 x 32 = 29.6 GPixels/sec ( a GHz Edition would be 1000 x 32 = 32 GPixels/sec, or 33.6 GTex/sec under boost clock)
Likewise, texture fillrate is Core freq * TMUs
7970 is 925 x 128 = 118.4 GTexels/sec (GHz Edition would be 1000 x 128 = 128 GTex/sec, or 134.4 GTex/sec under boost clock)
as far as i know, amd are allowing their partner to custom its cooler and modified of its voltage to gain more clocks higher than average. :)
I'm surprised an article like that got pulled from TPU as censorship isn't something they do too much of around here I'm glad to say.
Finally, frame rating is a complex test methodology to explain and understand the results from, so my article summarizes it, with PC Perspective's original in depth version linked to at the bottom.
I can't speak for the rest of the folk that ditched crossfire for Titan but if Nvidia release a higher specced Titan as is rumoured (which i don't really believe) I'll not buy Nvidia again as long as AMD have competitive offerings. I left the AMD crossfire problems behind for a single super card. If Nvidia release something better a few months later they will not get my money again. AMD on the other hand have always said they'll bring out a 7990, just a bit late is all.
So if AMD finally iron out their software and release the 7990 with near perfect drivers and Nvidia release a higher specced Titan to boot, it is Nvidia who don't give shit about their customers. :shadedshu
First, AMD cards are cheaper at the high end...by a lot. They were not initially, but massive price drops have them squarely below NVIDIA whos prices haven't budged for the same exact performance.
Second, how is it a scandal when they never tested for it in the first place?
Please, TPU, stop making mountains out of molehills...the lemming just fall right off the cliff... :nutkick:
ooooh I cant wait to see some triple slot coolers and some supersized slap my bitch up coolers..... wish I was rich!! :p
I digress.
Do keep in mind there are a huge number of Crossfire users here on TPU that DO agree it's an issue, and as big of an issue as related, so you'll have a hard time convincing those that use Crossfire there's no problems, and that's it's no big deal.
See, I can be a broken record, just like you.
:slap:
EarthDog: Not a big problem. No I don't run Crossfire.
Xzibit: Yeah, it's an issue....but look, NVidia has the same problems!
Also keep in mind, that W1zz does relate the same issues as being evident, in his reviews, before the PCPer stuff came out. Frankly, nobody really cares about PCPer, as all they showed is WHY we have issues in some instances, but doesn't provide a fix.
Why not just put your opinion on the subject in your signature, and not post? :roll: The less you post about it not being an issue, the less you'll find others posting that it is.
Most of the worst issues are rather specific, with some examples being:
Crossfire (both scaling and stuttering/frametimes)
Bugs while overclocking
Bugs when using a multi-monitor set-up
Bugs with low power modes
Bugs with the use of OpenCL.
Bugs with the use of displayport
As you can tell by the nature of those problems, they do not apply to someone not using that specific feature, and furthermore, as is usually the case with bugs: their occurence is usually not pervasive, and sometimes unpredictable.
The fact of the matter is: There are problems, but they are simply not applicable to everyone, either because the person in question use their hardware in such a way that they never engage in bug-ridden useage, or they simply don't notice the fact that something is not working as intended.
I myself as a single card user have noticed a lot of bugs, mainly overclocking, displayport, and multi-monitor related ones, but also some OpenCL weirdness. Furthermore I also got a friend who's running crossfire, and sometimes he's better off just running on 1 card, plain and simple, and while i probably wouldnt mind dealing with some issues that arise, the state of things at the moment is that in peoples heads, they generally just have to jump through too many hoops in order to enjoy something that is advertised as working.
For people like Earthdog I've got only one tip: Try to look beyond your own situation, as you're only one person compared to the numerous people in this thread alone posting something different(although this tip will probably be in vain, judging by his repetitive posts).
Edit: While there are definitely problems, I can also see things changing, and i've already felt some of those changes; like the improvements they've made to games like skyrim and borderlands. I actually have quite a bit of confidence that things will get better, confidence i had a whole lot less of half a year ago.
:p
I have months and months of problems, and no properly working WHQL Win8 drivers. Frame latency can eat it, Crossfire simply causes my system to crash at random intervals, and THAT is what's really bugging me about AMD's drivers.
Frame latency only explains why playing games makes me physically ill. Now that I know why, I got rid of Crossfire, and can game again!
:roll:
However, AMD still has other problems, too. MANY of them. And, no the pictured system is NOT overclocked.
If the thing is powered by 2 8 pins, that makes it a 375watt TDP card (well, power draw anyhow). If they have managed to do that, what the hell magic have they performed on the same silicon?
2 Fully fledged 1GHz chips on 2x3GB memory on less than 400 watts. That's pretty bloody impressive. Very, very impatient for full, warts and all reviews to come out in two days....
Frankly, nobody cares about people blowing this out of proportion. As I said, is it an issue, yes it is, for some people, not all, not on all titles at or most even. CFx is not "useless" as some fearmongers have stated.
Here is my exact take on this in fact. As a team, instead of fearmongering like was done at many sites/articles...: www.overclockers.com/nvidias-fcat-gpu-testing-pursuing/
@ Math - I have always noted this is a problem, just not as bad as A LOT of people have made it out to be is all. :)