I got here a brand-new PowerColor Radeon HD5570 1Gb GDDR3 (model: AX5570-1GBK3-HV2) and putting it through benchmarks just to see how it compares.. I was surprised to notice that it scores nearly 20-50% than reference HD5570 benchmarks I can find on the web, so I decided to check more carefully... details as follows. GPU-Z info shows the following: These are the scores I got while running 3DMark03, 3DMark05, 3DMark06, 3DMark Vantage: Test Setup: Core 2 Duo E6420 Asus P5L-MX (945G chipset), 4Gb DDR2-667 (dual-channel) Win7 SP1 (32-bit) PowerColor Radeon HD5570 Catalyst 11.12 (default benchmark scores after a clean boot, no antivirus background tasks nor the like 3DMark03 (1024x768) = 15315 3DMark05 (1024x768) = 9779 3DMark06 (1280x1024) = 4613 (SM 2.0 score = 1550 ; HDR/SM3.0 score = 2146) 3DMark Vantage (Performance preset 1280x1024) = P3186 ; GPU score = 2986 When I compare the scores with HD5570 scores on the Internet, it seems a bit slower (sometimes much slower) -- I understand most benchmark reviews use a very fast CPU system (whereas here it's an old E6420 only), but then I don't think the E6420 should be bottlenecking the HD5570 a lot to have significantly slower scores. (compared for instance: http://www.techpowerup.com/reviews/Powercolor/HD_5570/25.html where the test setup used a Core i7-920 and got these scores: 3DMark03 = 24194 3DMark05 = 13798 3DMark06 = 7275 ) Differences in specs than reference HD5570: I notice this PowerColor Radeon HD5570 has a slightly slower memory clock than the reference HD5570: this HD5570 has only 667mhz GDDR3 memory (=1334mhz effective rate) whereas the reference Radeon HD5570 is supposed to be 800mhz = 1600mhz effective rate while some Radeon HD5570 actually have 900mhz = 1800mhz effective rate. (with regards to underclocking the video memory clock -- this may be acceptable, since I notice other budget-brands also tend to underclock the memory clocks compared to reference: one such unit I've tested before was a Sparkle brand GF9600GT 512Mb GDDR3 that had only 700mhz=1400mhz memclock rate whereas reference GF9600GT states 900mhz=1800mhz mem clock; but in this budget model, the actual memory chips they used were officially rated at 600mhz=1200mhz memclock only, so that 700mhz=1400mhz was already overclocking the actual memory chips used on that card... anyway that's a different story..) (also when video card memory is underclocked by the manufacturer, I notice that the manufacturer webpage fails to specify the memory clock on their specs webpage -- this goes true for PowerColor's HD5570 webpage where it lists the GPU clock mhz but Mem clock info seems purposely left blank. In the case of the Sparkle 9600GT I encountered before, I notice that its manufacturer webpage also purposefully didn't state the video memory clock speed...) Based on GPU-Z and other specs info, the Radeon HD5570 is supposed to have 400 stream / unified shader processors and 8 ROPs. Whereas this PowerColor HD5570 has only 320 stream / unified shader processors and 4 ROPs (assuming GPU-Z is correct). Another mysterious point: Isn't HD5570 supposed to be codenamed "Redwood", why is it "Turks" here? Or is there a "cut-down" version of HD5570, which is used in this budget-oriented PowerColor HD5570? And 320 stream processors / unified shaders is supposed to be Radeon HD5550, not the HD5570 (= 400 shaders) -- is PowerColor cutting corners here and overclocking/rebadging the HD5550 chips into HD5570 graphics cards? (The significant thing above is the 320 vs 400 stream processors. I notice from other web references -- mostly user reviews (unlike bigger hardware websites like TechPowerUp which seem to be provided with reference clocks of 800mhz or 900mhz video mem clock for their hardware testing) -- that someone got a PowerColor with a clocked down MEM clock (667mhz instead of 800mhz -- so this seems to be a "cutting corners" thing for PowerColor). Also, checking PowerColor's website, they do NOT list the MEM clock for their HD5570 (maybe because they are cutting corners here compared to other reference HD5570). I also tried firing up Aida64 v2.20 to see what GPU details can be gleaned from this PowerColor Radeon HD5570. Unfortunately, Aida64 also fails to give details of this video card, but it does state the card is "NI Turks LE", which I take it to mean Northern Islands Turks LE. (however, nowhere do I find a Turks LE -- from this wikipedia page: http://en.wikipedia.org/wiki/Comparison_of_AMD_graphics_processing_units It states that Turks Pro = HD6570 and Turks XT = HD6670; but there's no Turks LE.. Using GPU-Z to dump the BIOS of this video card shows the following info: we can make out these strings: Turks LE1 RV930_LE (TUL = PowerColor) GPU Caps Viewer 1.14.6 also gets stumped by this mysterious PowerColor Radeon HD5570 (GPU: unknown): Other (confusing) clues here: http://developer.amd.com/download/pc_vendor_id/pages/default.aspx The GPU-Z screenshot above of the PowerColor Radeon HD5570 says Device ID = 675F and String ID = "AMD Radeon HD 5500 series" (take notes HD5500 series could mean either HD5550 or HD5570 -- Catalyst Control Center also doesn't clearly identify the card and just says "HD5500 series" ; no indication that the card is actually an HD5570 apart from the PowerColor box packaging pictured below) So perhaps a "real" HD5570 (the one with 400 stream processing units) would have Device ID = 68DA and string ID = "ATI Radeon HD5500 series". Hmmm... an ATI Radeon HD5500 is superior to an AMD Radeon HD5500??