FLUX.2 Klein — 4B vs 9B (bf16 vs FP8) img2img on RTX 5090

Timings & VRAM

VariantCFGStepsLoad Avg gen / imgPeak VRAMSuccess
Flux.2 Klein 4B (bf16, 4-step) 1.0 4 3.0s 2.0s 18.54 GB 10 / 10
Flux.2 Klein 9B (bf16, 4-step, mmgp offload) 1.0 4 1.5s 6.8s 19.68 GB 10 / 10
Flux.2 Klein 9B (FP8) 1.0 4 1.1s 3.0s 21.57 GB 10 / 10

Drag the slider to compare A vs B; switch either dropdown to pick any variant. The number next to each dropdown is that variant's generation time for this example. Click the input thumbnail to view it full size.

example #01

promptSmooth out all wrinkles on the man's white button-up shirt, making it perfectly crisp and freshly pressed with no creases or folds anywhere, keeping its original color, collar, fit, and buttons unchanged. Keep the man's face, pose, expression, black pants, brown shoes, and the entire bar interior, lighting, background, and composition exactly as in the original, unchanged.
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example #02

promptEnhance the image to look like a clean, sharp, modern digital photo with natural lighting and realistic skin tones, preserving the original composition, facial expressions, clothing colors, and the "Happy Birthday Dennis" cake text exactly as-is. Keep all background elements including the wall clock and tablecloth unchanged.
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example #03

promptReplace the woman's current black top and blue jeans with a full safari guide outfit: khaki short-sleeve button-up shirt, matching khaki cargo pants, brown belt, and safari-style boots, keeping her glasses, pose, and position unchanged. The boy on the dinosaur keeps his exact red t-shirt, blue cap, and blue jeans, completely unchanged. Keep the desert background, dinosaur statue, lighting, and composition identical.
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example #04

promptAdd a tiny person, about the size of a thumb, standing on the sole of her right foot near the arch, wearing a miniature outfit matching the photo's realism, with natural lighting and shadows blending into the foot's texture; keep her face, pose, clothing, expression, background, and all other elements exactly as in the original, unchanged.
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example #05

promptRemove the purple and blue mechanical cyborg device on the character's back along with all glowing white energy trails and laser effects, restoring the character's natural back and clothing to match the surrounding dark forest outfit and silhouette, keeping the character's pose, face, hair, and all surrounding animals, trees, mushrooms, and glowing particles exactly as in the original, unchanged.
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example #06

promptRemove the Resident Evil 4 Original Soundtrack text entirely from the image, leaving the background behind it clean and seamlessly matching the surrounding dark, atmospheric forest scene with branches and ambient lighting. Keep all characters, their poses, expressions, clothing, weapons, and the overall composition, lighting, and photorealistic style exactly as in the original, unchanged.
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example #07

promptRestore the image to high quality: remove all wrinkles, cracks, tears, and dust; enhance resolution and sharpness while preserving the original style; apply natural, era-appropriate skin tones and colors; keep the woman's face, expression, glasses, hair, clothing, necklace, background, lighting, and composition exactly as in the original, unchanged.
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example #08

promptRemove the XelTrades logo and text at the top of the image, including the Instagram handle and X handle at the bottom-left. Also remove the small text block with handles at the bottom-right. Replace all removed areas with clean white background matching the surrounding design. Keep the main title 'Protected Swing', subtitle, and all other layout elements exactly as in the original, unchanged.
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example #09

promptRemove the green soap dispenser with white pump near the shoulder and the white toilet with silver flush handle visible in the mirror reflection, leaving clean tiled wall matching the surrounding bathroom tiles; keep the boy's face, jersey, pose, mirror frame, lighting, and all other elements exactly as in the original, unchanged.
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example #10

promptRemove the rectangular metal box visible in the mirror's reflection behind the person, replacing it with a clean continuation of the tiled wall that matches the surrounding texture and lighting; keep the woman's pose, expression, clothing, hair, the mirror frame, sink, faucet, wall sconces, and all other elements exactly as in the original, unchanged.
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